Position switches FR series

Transcription

1 B Position switches FR series Selection diagram 0 A A A 0 A external rubber gasket external rubber gasket for electrical panels external rubber gasket external rubber gasket external rubber gasket 0 9 stainless steel round rod square rod fiber glass rod porcelain roller WITH RESET 0-W 0-W 0-W 0-W -W 0-W -W -W ACTUATORS CONTACT BLOCKS 9 slow action slow action slow action snap action snap action snap action slow action overlapped slow action shifted and spaced slow action shifted E NO+ NC +NC x() slow action slow action slow action slow action slow action snap action independent closer slow action shifted electronic PNP CONDUIT ENTRY product option Threaded conduit entry PG, (standard) A PG M Mx, M Mx, With assembled cable gland for Ø to Ø mm K cables range for Ø to Ø mm K cables range With M plastic connector assembled and wired K0 poles from bottom K poles from bottom With M metal connector assembled and wired K0 poles from bottom K0 poles from bottom accessory sold separately page / General Catalog 09-

2 A 0 A - stainless steel stainless steel stainless steel Rope external Ø mm Ø mm Ø mm Ø mm Ø mm switches for rubber gasket roller roller roller roller roller signalling B A B 0 adjustable lever safety adjustable lever without actuator LOOSE ACTUATORS See page / C D E A -W -W -W -W -W without actuator Code structure Attention! The feasibility of a code number does not mean the effective availability of a product. Please contact our sales office. article options FR 0-WXGMK0 B C Housing FR polymer housing, one conduit entry, snap action, slow action, slow action overlapped Actuators 0 short plunger 0 roller lever 0 offset roller lever Suffix no suffix (standard) with stainless steel roller: - Ø mm for actuator A, - Ø mm for actuators A, 0, A, 0 - Ø mm for actuators 0,,,,,,, with Ø mm polymer roller (see special loose actuators on page /) with Ø 0 mm rubber roller (see special loose actuators on page /) with Ø 0 mm overhanging rubber roller (see special loose actuators on page /) General Catalog 09- Contacts type silver contacts (standard) G silver contacts gold plated µm (contact block excluded) External metallic parts zinc plated steel (standard) X stainless steel Reset hooking without reset (standard) W normal reset hooking Preinstalled cable gland or connectors no cable gland or connector (standard) K with assembled cable gland suitable for Ø to Ø mm cables range K0 with poles M plastic connector For the complete list of all combinations, please contact our technical office. Threaded conduit entry PG, (standard) A PG M Mx, M Mx, page / A B C D E F G H

3 B Position switches FR series Technical data Housing Made of glass-reinforced polymer, self-extinguishing, shock-proof thermoplastic resin and with double insulation One threaded conduit entry Protection degree: IP according to EN 09 General data Ambient temperature: from - C to +0 C Version for operation in ambient temperature from -0 C to +0 C on request Max operating frequency: 00 operations cycles /hour Mechanical endurance: million operations cycles Assembling position: any Driving torque for installation: see pages /-/ () One operation cycle means two movements, one to close and one to open contacts, as foreseen by EN 09-- standard. Main data Polymer housing, one conduit entry Protection degree IP contact blocks available actuators available External stainless steel parts versions M assembled connector versions Silver contacts gold plated versions Markings and quality marks: Approval IMQ: EG Approval UL: E Approval CCC: Approval EZU: Cross section of the conductors (flexible copper wire),,,, : min. x 0, mm ( x AWG ) max. x, mm ( x AWG ),,, 9,,,,,,,, : min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) Contact block : min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) In conformity with standards: IEC 09--, EN 09--, EN 00, IEC 0-, EN 0-, EN, EN ISO 0-, EN ISO 0-, IEC 09, EN 09, NFC -0, VDE 00-0, VDE 0, CENELEC EN 00. Approvals: IEC 09--, UL 0, GB0.-0 In conformity with requirements requested by: Low Voltage Directive 0/9/EC, Machinery Directive 0//EC and Electromagnetic Compatibility 0//EC. Positive contact opening in conformity with standards: IEC 09--, EN 09--, VDE 00-. Installation for safety applications: Use only switches marked with the symbol. The safety circuit must always be connected with the NC contacts (normally closed contacts: -, - or -) as stated in the standard EN 09--, encl. K, par.. The switch must be actuated with at least up to the positive opening travel shown in the travels diagrams on page /. The switch must be actuated at least with the positive opening force, shown in brackets, underneath each article, near the value of the min. force. If not expressly indicated in this chapter, for the right installation and the correct utilization of all articles see requirements indicated from page / to page /. Electrical data Utilization categories without connector with poles M connector Thermal current (Ith): Rated insulation voltage (Ui): 00 Vac 00 Vdc 00 Vac 00 Vdc for contact blocks,,,, Conditional shot circuit current: 00 A according to EN 09-- Protection against short circuits: fuse 00 V type am Pollution degree: Thermal current (Ith): A Rated insulation voltage (Ui): 0 Vac 00 Vdc Protection against short circuits: fuse A 00 V type gg Pollution degree: Alternate current: AC (0...0 Hz) Ue (V) Ie (A) Direct current: DC Ue (V) 0 Ie (A), 0, Alternate current: AC (0...0 Hz) Ue (V) 0 Ie (A) Direct current: DC Ue (V) 0 Ie (A), 0, with poles M connector Thermal current (Ith): A Rated insulation voltage (Ui): 0 Vac Vdc Protection against short circuits: fuse A 00 V type gg Pollution degree: Alternate current: AC (0...0 Hz) Ue (V) Ie (A) Direct current: DC Ue (V) Ie (A) page / General Catalog 09-

4 Data type approved by IMQ, CCC and EZU Rated insulation voltage (Ui): 00 Vac 00 Vac for contact blocks,,,, Thermal current (Ith): Protection against short circuits: fuse 00 V type am Protection degree: IP MV terminals (screw clamps) Pollution degree Utilization category: AC Operation voltage (Ue): 00 Vac (0 Hz) Operation current (Ie): A Forms of the contact element: Za, Zb, Za+Za, Y+Y, X+X, Y+Y+X, Y+Y+Y, Y+X+X Positive opening of contacts on contact block,,, 9,,,,,,,,,, In conformity with standards: EN 09-, EN 09-- and subsequent modifications and completions, fundamental requirements of the Low Voltage Directive 0/9/CE and subsequent modifications and completions. Please contact our technical service for the list of approved products. Data type approved by UL Utilization categories Q00 (9 VA, -0 Vdc) A00 ( VA, -00 Vac) Data of the housing type, X indoor use only,, For all contact blocks except and use 0 or C copper (Cu) conductor and wire size No. - AWG. Terminal tightening torque of, lb in (0. Nm). For contact blocks and use 0 or C copper (Cu) conductor and wire size No. AWG. Terminal tightening torque of lb in (. Nm). In conformity with standard: UL 0 Please contact our technical service for the list of approved products. A B A B Adjustable levers Overturning levers Rotating heads C In switches with revolving lever it is possible to adjust the lever with steps for the whole 0 range. The positive movement transmission is always guaranteed thanks to the particular geometrical coupling between the lever and the revolving shaft as prescribed for safety applications by the German standard BG-GS- ET-. It s possible to fasten the lever on switches on straight or reverse side, maintaining the positive coupling. In this way it is possible to obtain two different work plans of the lever. In all switches, it is possible to rotate the head in 90 steps. D E A B C Working operation of contact block with independent contacts The contact block has two NC contacts, both with positive opening activated independently according to the lever turning direction. Lever turned to left Lever not turned Lever turned to right Contacts diagram Contacts diagram Contacts diagram A B C D E F G H General Catalog 09- page /

5 B Position switches FR series With external rubber gasket With stainless steel roller on request With external rubber gasket Contacts type: With stainless steel roller on request R = snap action L = slow action LO = slow action overlapped LS = slow action shifted LV = slow action shifted and spaced LI = slow action independent LA = slow action closer = electronic PNP R L LO 9 L L R R LV LS LS LA L L L R E Max speed Min. force Travel diagrams.9. FR 0 FR 0 FR 0 FR 90 FR 0 FR FR FR FR 0 FR 0 FR 0 FR 0 FR FR FR FR E Ø NO+ NC +NC x() page / - type N ( N ) page / - group. FR A FR A FR A FR 9A FR A FR A FR A FR A FR A FR A FR A FR A FR A FR A FR EA Ø Ø NO+ NC +NC page / - type N ( N ) page / - group FR 0 FR 0 FR 0 FR 90 FR 0 FR FR FR FR 0 FR 0 FR 0 FR 0 FR FR FR FR E NO+ NC +NC. x() page / - type N ( N ) page / - group FR A FR A FR A FR 9A FR A FR A FR A FR A FR A FR A FR A FR A FR A FR A FR A FR EA NO+ NC +NC. x() page / - type, N ( N ) page / - group With external rubber gasket With Ø mm stainless steel roller on request With stainless steel roller on request With external rubber gasket With stainless steel roller on request R L LO 9 L L R R LV LS LS LA L L L R E Max speed Min. force Travel diagrams. FR A FR A FR A FR 9A FR A FR A FR A FR A FR A FR A FR A FR A FR A FR A NO+ NC +NC FR EA page / - type N ( N ) page / - group 9 0. FR 0 FR 0 FR 0 FR 90 FR 0 FR FR FR FR 0 FR 0 FR 0 FR 0 FR FR FR FR E. NO+ NC +NC x() page / - type N ( N ) page / - group FR A FR A FR A FR 9A FR A FR A FR A FR A FR A FR A FR A FR A NO+ FR A NC FR A +NC FR A x() FR EA page / - type, N ( N ) page / - group. FR 0 FR 0 FR 0 FR 90 FR 0 FR FR FR FR 0 FR 0 FR 0 FR 0 FR FR FR FR E NO+ NC +NC x() page / - type N ( N ) page / - group Accessories See page / All measures in the drawings are in mm page / General Catalog 09-

6 Contacts type: R = snap action L = slow action LO = slow action overlapped LS = slow action shifted LV = slow action shifted and spaced LI = slow action independent LA = slow action closer = electronic PNP R L LO 9 L L R R LV LS LS LA L L L R E Max speed Min. force Travel diagrams With external rubber gasket FR A FR A FR A FR 9A FR A FR A FR A FR A FR A FR A FR A FR A NO+ FR A NC FR A +NC FR A x() FR EA page / - type N ( N ) page / - group. With external rubber gasket. 0. FR 0 FR 0 FR 0 FR 90 FR 0 FR FR FR FR 0 FR 0 FR 0 FR 0 FR FR FR FR E Ø NO+ NC +NC x() page / - type N ( N ) page / - group Fixed only by threaded head in vertical position.. FR FR FR FR 9 FR FR FR FR FR FR FR FR FR FR FR FR E Mx NO+ NC +NC x() page / - type N ( N ) page / - group Ø FR FR FR FR 9 FR FR FR FR FR FR FR FR FR FR FR FR E M x NO+ NC +NC x() page / - type N ( N ) page / - group Ø A B A B C D E A B Ø mm polymer roller Ø mm stainless steel roller C R L LO 9 L L R R LV LS LS LA L L L R E Max speed Min. force Travel diagrams 0... FR FR FR FR 9 FR FR FR FR FR FR FR FR FR FR FR FR E M x NO+ NC +NC x() page / - type N ( N ) page / - group FR FR FR FR 9 FR FR FR FR FR FR FR FR FR FR FR FR E R NO+ NC +NC x() page / - type N ( N ) page / - group. FR FR FR FR 9 FR FR FR FR FR FR FR FR FR FR FR FR E NO+ NC +NC. x() page / - type N ( N ) page / - group. FR - FR - FR - FR 9- FR - FR - FR - FR - FR - FR - FR - FR - FR - FR - FR - FR E- NO+ NC +NC. x() page / - type N ( N ) page / - group A B C D E F G H Items with code on the green background are available in stock General Catalog 09- page /

7 B Position switches FR series Contacts type: Fixed only by threaded head in vertical position With external rubber gasket With external rubber gasket R = snap action L = slow action LO = slow action overlapped LS = slow action shifted LV = slow action shifted and spaced LI = slow action independent LA = slow action closer = electronic PNP R L LO 9 L L R R LV LS LS LA L L L R E Max speed Min. force Travel diagrams FR FR FR FR 9 FR FR FR FR FR FR FR FR NO+ FR NC FR +NC FR x() FR E page / - type N ( N ) page / - group FR FR FR FR 9 FR FR FR FR FR FR FR FR FR FR FR FR E. NO+ NC +NC x() page / - type N ( N ) page / - group Mx. FR FR FR FR FR FR FR FR FR E Ø NO+ NC +NC x() m/s 0,0 Nm page / - group 9. FR FR FR FR FR FR FR FR FR E NO+ NC +NC x() m/s 0,0 Nm page / - group Ø. With external rubber gasket With Ø mm stainless steel roller on request Other rollers available. See page / x mm square rod R L LO 9 L L R R LV LS LS LI LA L L L R E Max speed Min. force Travel diagrams. FR FR FR FR FR FR FR FR FR E NO+ NC +NC x() m/s 0, Nm page / - group Ø.. 9 FR 0 FR 0 FR 0 FR 90 FR 0 FR FR FR FR 0 FR 0 FR FR 0 FR 0 FR FR 0 FR 0 FR E.. NO+ NC +NC x() page / - type 0,0 Nm (0, Nm ) page / - group FR FR FR FR 9 FR FR FR FR FR FR FR FR FR NO+ FR NC FR +NC FR x() FR E page / - type 0,0 Nm (0, Nm ) page / - group FR FR FR FR 9 FR FR FR FR FR FR FR FR FR FR FR FR FR E xx. NO+ NC +NC x(), m/s 0,0 Nm page / - group Accessories See page / page / General Catalog 09-

8 Ø mm stainless steel round rod Other rollers available. See page / Other rollers available. See page / Contacts type: R = snap action L = slow action LO = slow action overlapped LS = slow action shifted LV = slow action shifted and spaced LI = slow action independent LA = slow action closer = electronic PNP R L LO 9 L L R R LV LS LS LI LA L L L R E Max speed Min. force Travel diagrams. 9 FR FR FR FR 9 FR FR FR FR FR FR FR FR FR FR FR FR FR E Ø... NO+ NC +NC x(), m/s 0,0 Nm page / - group FR 0 FR 0 FR 0 FR 90 FR 0 FR 0 FR 0 FR 0 FR 0 FR 0 FR 0 FR 0 FR 0 FR 0 FR 0 FR 0 FR E0 Øx. NO+ NC +NC x(), m/s 0,0 Nm page / - group. 9 9 FR FR FR FR 9 FR FR FR FR FR FR FR FR FR FR FR FR FR E. NO+ NC +NC x() page / - type 0,0 Nm (0, Nm ) page / - group FR FR FR FR 9 FR FR FR FR FR FR FR FR FR NO+ FR NC FR +NC FR x() FR E page / - type 0,0 Nm (0, Nm ) page / - group A B A B C D E A B R L LO 9 L L R R LV LS LS LI LA L L L R E Max speed Min. force Travel diagrams 0. Porcelain roller Ø 9 FR -E0V9 FR -E0V9 FR -E0V9 FR 9-E0V9 FR -E0V9 FR -E0V9 FR -E0V9 FR -E0V9 FR -E0V9 FR -E0V9 FR -E0V9 FR -E0V9 FR -E0V9 FR -E0 FR E-E0V9.. NO+ NC +NC x() 0, m/s 0,0 Nm (0, Nm ) page / - group Other rollers available. See page /. 9 9 FR FR FR FR 9 FR FR FR FR FR FR FR FR FR FR FR FR FR E NO+ NC +NC x() page / - type 0,0 Nm (0, Nm ) page / - group Other rollers available. See page / FR () FR () FR () FR 9 () FR FR () FR FR () FR () FR FR () FR () FR () NO+ FR () NC FR () +NC FR x() FR E page / - type 0,0 Nm (0, Nm ) page / - group Other rollers available. See page / FR FR FR FR 9 FR FR FR FR FR FR FR FR FR FR FR FR FR E 9 0 NO+ NC +NC x() page / - type 0,0 Nm (0, Nm ) page / - group C A B C D E F G H () Positive opening only with lever adjusted on the max. See page / General Catalog 09- Items with code on the green background are available in stock page /

9 B Position switches FR series Other rollers available. See page / Fiber glass rod Rope switches for signalling Contacts type: R = snap action L = slow action LO = slow action overlapped LS = slow action shifted LV = slow action shifted and spaced LI = slow action independent LA = slow action closer = electronic PNP R L LO 9 L L R R LV LS LS LI LA L L L R E Max speed Min. force Travel diagrams. 9 FR FR FR FR 9 FR FR FR FR FR FR FR FR FR FR FR FR FR E 9 NO+ NC +NC 0 x() page / - type 0,0 Nm (0, Nm ) page / - group X. Øx0. FR 9 FR 9 FR 9 FR 99 FR 9 FR 9 FR 9 FR 9 FR 9 FR 9 FR 9 FR 9 FR 9 NO+ FR 9 NC FR 9 +NC FR 9 x() FR E9, m/s 0,0 Nm page / - group... FR FR FR FR 9 FR FR FR FR FR FR FR FR +NC FR NO FR NO+ FR x() 0, m/s initial N - final 0 N page / - group. FR 0- FR 0- Ø. This switch can be installed on doors of electrical boards. It is used to switch on possible signal devices, once the door is open (e.g. three-phase flashing devices, etc.) The operator assigned to the board maintenance may simulate the closing of the door by pushing the blue push button. At the end of the maintenance the functionality of the switch will be automatically restablished easily by closing the door of the board. page / - type N ( N ) page / - group Position switches FR series with reset Pizzato Elettrica has developed an innovative reset device code W to make perfectly simultaneous the actuator and the contact block tripping. The new device is a block inserted between the switch body and the head, and could be rotated independently from this last one. This new device has following advantages: * The reset device integrate in any standard actuation head * with snap action are no more necessary because the tripping movement is made by the reset device itself * Unlike some previous versions, the reset device can be rotated independently from the head for the maximum flexibility during the assembling. With stainless steel roller on request With stainless steel roller on request Ø L 9 L L L L L R Max speed Min. force Travel diagrams FR 0-W FR 90-W FR 0-W FR 0-W FR -W FR -W FR -W NO+ NC +NC + page / - type N ( N ) page / - group FR 0-W FR 90-W FR 0-W FR 0-W FR -W FR -W FR -W NO+ NC +NC + page / - type N ( N ) page / - group FR 0-W FR 90-W FR 0-W FR 0-W FR -W FR -W FR -W NO+ NC +NC + page / - type N ( N ) page / - group FR 0-W FR 90-W FR 0-W FR 0-W FR -W FR -W FR -W NO+ NC +NC + page / - type N ( N ) page / - group Accessories See page / page /9 General Catalog 09-

10 Contacts type: With stainless steel roller on request With Ø mm stainless steel roller on request Other rollers available. See page / Other rollers available. See page / R = snap action L = slow action A L 9 L L L L L R Max speed Min. force Travel diagrams 9. FR -W FR 9-W FR -W FR -W FR -W FR -W FR -W. NO+ NC +NC + page / - type N ( N ) page / - group. FR 0-W FR 90-W FR 0-W FR 0-W FR -W FR 0-W FR 0-W NO+ NC +NC + page / - type 0,0 Nm (0, Nm ) page / - group. FR -W FR 9-W FR -W FR -W FR -W FR -W FR -W NO+ NC +NC + page / - type 0,0 Nm (0, Nm ) page / - group. FR -W FR 9-W FR -W FR -W FR -W FR -W FR -W 9. NO+ NC +NC + page / - type 0,0 Nm (0, Nm ) page / - group Other rollers available. See page / Other rollers available. See page / Other rollers available. See page / Other rollers available. See page / B A B C D E A B C L 9 L L L L L R Max speed Min. force Travel diagrams FR -W FR 9-W FR -W FR -W FR -W FR -W FR -W NO+ NC +NC + page / - type 0,0 Nm (0, Nm ) page / - group FR -W FR 9-W FR -W FR -W FR -W FR -W FR -W NO+ NC +NC + page / - type 0,0 Nm (0, Nm ) page / - group FR -W FR 9-W FR -W FR -W NO+ FR -W NC FR -W +NC FR -W + page / - type 0,0 Nm (0, Nm ) page / - group FR -W FR 9-W FR -W FR -W FR -W FR -W FR -W NO+ NC +NC + page / - type 0,0 Nm (0, Nm ) page / - group A B C D E F G H Items with code on the green background are available in stock General Catalog 09- page /0

11 B Position switches FR series Position switches with revolving lever without actuator Contacts type: R = snap action L = slow action LO = slow action overlapped LS = slow action shifted LV = slow action shifted and spaced LI = slow action independent LA = slow action closer = electronic PNP R L LO 9 L L R R LV LS LS LI LA L L L R E Min. force Travel diagrams FR FR FR FR 9 FR FR FR FR FR FR FR FR FR NO+ FR NC FR +NC FR x() FR E 0,0 Nm (0, Nm ) page / - group with manual reset knob. FR -W FR 9-W FR -W FR -W FR -W FR -W FR -W 0.9 NO+ NC +NC + 0,0 Nm (0, Nm ) page / - group IMPORTANT For safety applications: join only switches and actuators marked with symbol. For more information about safety applications see page /. Loose actuators IMPORTANT: These loose actuators can be used with items of series FR, FM, FX, FZ, FK only Ø mm roller Ø mm roller Adjustable square rod xx mm Flexible rod actuator Adjustable round rod Ø x mm Polymer roller Ø mm pcs pack xx.. Øx0 9 Ø M Ø x. M VF LE0 VF LE VF LE VF LE VF LE0 VF LE Polymer roller Ø mm Porcelain roller Polymer roller Ø mm Adjustable actuator with polymer roller Adjustable safety actuator with polymer roller Polymer roller Ø mm Adjustable fiber glass rod 9-9 VF LE VF LE () VF LE VF LE () VF LE VF LE VF LE9 - Only orders for multiple quantities of the packs are accepted. - () Actuator VF LE suits to safety applications only if adjusted to its max length, as you can see in figure beside. If you need an adjustable lever for safety applications, use the adjustable safety lever VF LE. - () The position switch obtained by assembling the switch FR (e.g. FR, FR ) with the actuator VF LE will not present the same travel diagrams and actuating forces as the position switch FR -E0V9 (e.g. FR -E0V9, FR -E0V9...). - () The actuator cannot be oriented to inside direction because it will mechanically interfere with the switch head. 9 Accessories See page / page / General Catalog 09-

12 Special loose actuators IMPORTANT: These loose actuators can be used with items of series FR, FM, FX, FZ, FK only Ø mm stainless steel rollers pcs pack 0. M A B. VF LE- VF LE- VF LE- VF LE- VF LE- () VF LE- VF LE- Ø mm polymer rollers M 9.. M. 9. M. VF LE- () VF LE- () VF LE- VF LE- () VF LE- () VF LE- VF LE- Ø 0 mm rubber rollers 0 M M M M M A B C D E A B C () () () () () VF LE-R VF LE-R VF LE-R VF LE-R VF LE-R VF LE-R VF LE-R Ø 0 mm rubber rollers VF LE- () VF LE- () VF LE- () VF LE- () VF LE- VF LE- () 0 A B C D Ø 0 mm overhanging rubber rollers E F G VF LE- () VF LE- H Items with code on the green background are available in stock General Catalog 09- page /

13 Utilization requirements Installation of single switches for safety applications Use only switches with the symbol (see figure on the side). Connect the safety circuit to the NC normally closed contacts (-, - or -). The NO normally open contacts (-, -, -) should be used only for signalling; these contacts are not to be connected with the safety circuit. However, if in the same protection two or more switches are used, it is possible to connect the contact NO to safety circuit. The switch must be actuated with the minimum positive opening travel indicated in the travel diagrams with symbol. The switch must be actuated with the minimum positive opening force indicated in brackets below every article, near the value of the min. force. When the machine guard has been open and during the whole opening travel, the switch must be triggered directly (fig. ) or through a rigid connection (fig. ). Only in this way the positive opening of the NC normally closed contacts (-, -, -) is guaranteed. Mechanical stop Fig. FD 0 FD 0 FD FD Fig. In the safety application with only one switch for each guard, the switches should not be applied to activate by release (fig. and ) or through a non rigid connection (i.e. by a spring). Fig. Fig. page / General Catalog 0-0

14 0 Utilization requirements Mechanical stop In accordance with the EN standard, paragraph..., the position sensors should not be used as mechanical stop. Mechanical stop Mechanical stop The actuator must not exceed the max. travel as indicated in the travel diagrams. The guard should not make a mechanical stop on the switch head. The actuator must not strike directly against the switch head. Mechanical stop 0 0 The actuator must not strike directly against the magnetic sensor. The opening angle of hinged safety switch HP and HC series must not go over 0. Actuation modality Recommended application Application to avoid Possible application but with mechanical stress for the switch higher than expected, mechanical endurance is not guaranteed Forbidden application General Catalog 0-0 page /

15 Utilization requirements Maximum and minimum actuation speed: switches for heavy duty FD-FL-FP-FC series Type Lever with roller ϕ Vmax (m/s) L, 9 0, 0 0, R 0,0 Type Plunger with roller ϕ Vmax (m/s) L R 0,0 0 0, 0,0 0, 0,0 Type Lever with roller Type Plunger ϕ Vmax (m/s) L R 0,0 0 0,, 0,0 0,, 0,0 Vmax (m/s) L R 0, 0,0 Contacts type: R = snap action L = slow action Screw driving torques: switches for heavy duty FD-FL-FP-FC-FG-FS-FT series Cover screws Head screws Lever screws Protection plugs screws M screws or the housing fastening with washer (FP-FS-FT series) 0,..., Nm 0,..., Nm 0,..., Nm,...,0 Nm 0,... 0, Nm... Nm page / General Catalog 0-0

16 Utilization requirements Travel diagrams table: position switches for heavy application FD - FP - FL - FC series Snap action R D C A B Pushing the switch NC opening and NO closing Max travel - A C D B Positive opening travel Differential travel Releasing the switch Closed contact Opened contact Slow action L D A A D D E C A NC opening Max travel A C D - E - NO closing Positive opening travel Closed contact Opened contact Contact block Group Group Group Group Group Group inverted contacts R x() R L LO L L R R 0.9. LV L 0. L. NO L NC L. +NC L. L All measures in the drawings are in mm or degrees General Catalog 0-0 page /

17 Utilization requirements Maximum and minimum actuation speed: switches for normal duty FR-FM-FX-FZ-FK series Type Lever with roller Type Plunger with roller ϕ Vmax (m/s) L, 9 0, 0 0, R 0,0 ϕ Vmax (m/s) L R 0,0 0 0, 0,0 0, 0,0 Type Lever with roller Type Plunger ϕ Vmax (m/s) L R 0,0 0 0,, 0,0 0,, 0,0 Vmax (m/s) L R 0, 0,0 Contacts type: R = snap action L = slow action Screw driving torques: switches for normal duty FR-FM-FX-FZ-FK-FW series For FR, FX, FK and FW series only: Cover screws Head screws Lever screws Protection plugs screws M screws or the housing fastening with washer (FR-FX-FK series) M screws or the housing fastening with washer (FW series) 0,... 0,9 Nm 0,... 0,9 Nm 0,... 0,9 Nm,...,0 Nm 0,... 0, Nm... Nm... Nm For FM and FZ series only: Cover screws Head screws Lever screws Protection plugs screws M screws or the housing fastening 0,..., Nm 0,..., Nm 0,..., Nm,...,0 Nm 0,... 0, Nm... Nm page / General Catalog 0-0

18 Utilization requirements Travel diagrams table: position switches for normal application FR - FM - FX - FZ - FK series Snap action R D C A B Pushing the switch NC opening and NO closing Max travel - A C D B Positive opening travel Differential travel Releasing the switch Closed contact Opened contact Slow action L D E C A NC opening Max travel A C D - E - NO closing Positive opening travel Closed contact Opened contact Contact block Group Group Group Group Group Group Group inverted contacts x() NO NC NC All measures in the drawings are in mm or degrees General Catalog 0-0 page /

19 Utilization requirements Travel diagrams table: position switches for normal application with reset W, FR - FX series Contact block Group c Group c Group c Group c 0 R 0.. R R. 0 0 R 9 0. R 0.. R. 0.. R. 0 9 R 0 R 0. R. 0. R. 0 R NO+ 0 R 0.. R R. 0 0 R NC 0 R 0.. R R. 0 0 R +NC 0 R 0.. R R. 0 0 R 0 R 0.. R R. 0 0 R 0. R 0.. R. 0.. R. 0 9 R Maximum and minimum actuation speed: prewired switches FA-FB-FF series Type Lever with roller Type Plunger with roller ϕ Vmax (m/s) L, 9 0, 0 0, R 0,0 ϕ Vmax (m/s) L R 0, 0,0 0 0, 0,0 0,0 0,0 Type Lever with roller Type Plunger ϕ Vmax (m/s) L R 0,0 0 0,, 0,0 0,, 0,0 Vmax (m/s) L R 0, 0,0 Contacts type: R = snap action L = slow action All measures in the drawings are in mm or degrees page / General Catalog 0-0

20 Utilization requirements Screw driving torques: prewired switches FA-FB-FF series For FF series only: Head screws 0,... 0, Nm For FA and FB series only: Head screws Lever screws 0,... 0,9 Nm Lever screws M screws for the housing fastening.... Nm M screws for the housing fastening. 0,..., Nm 0,..., Nm... Nm Travel diagrams table: prewired switches FA - FB - FF series Snap action R D C A B Pushing the switch NC opening and NO closing Max travel - A C D B Positive opening travel Differential travel Releasing the switch Closed contact Opened contact Slow action L D E C A NC opening Max travel A C D - E - NO closing Positive opening travel Closed contact Opened contact Contact block Group Group Group Group General Catalog 0-0 page /

21 Features The contact blocks developed by the company Pizzato Elettrica contain the experience gained in 0 years of technological development and in millions of pieces sold. The contact blocks range available shown in this chapter is one of the widest in the world in the sector of position switches. This chapter introduces to some features of Pizzato Elettrica contact blocks, in order to give the final user a better understanding of the technologies behind that element simply named contact. We underline that contact blocks are not available for sale (to the public) separately from switches, both because some of them are mechanically connected to the switch and because some technical features may change in accordance with the switch and its function. The following data intend to be a selection of all contact blocks, but cannot be used to determine complete characteristics of the switch equipped with that contact block. For example, when a contact block with positive opening is used in a switch with a not rigid actuator, the result is a switch that on the whole is not one with positive opening. The complete list of contact blocks currently in production is visible on page /, and contacts operation points in accordance with the switches family and actuator type are visible on pages /, / and /. On page /9, the features of the electronic contact block E, which can be used on position switches for a series of surveys, otherwise complex even with electronic sensors, are explained in detail. On the market doesn t exist an electronic sensor that at the same time has the characteristics of operation precision and repeatability, ability of the switching point adjustment, working temperature and price of this unit. 9 Description Page Retained screws / Description Classification of the contact blocks according to the standard IEC 9--: X, Y, C, Za, Zb Page /9 Finger protection terminals / 9 Contact type: Slow action / snap action / snap action with steady pressure / Clamping screw plates for different diameter cables / Self-lifting clamping screw plates / Force on the contacts / Positive opening of the contacts /9 Contact material: Silver alloy or gold-plated silver alloy / Contact block technology and reliability: Single, double / Operation voltage and current for reliable switching / page /9 General Catalog 0-0

22 Retained screws Switches with this characteristic have clamping screws that remain in seat even if completely unscrewed. This feature reduces wiring time, since the operator does not have to be careful not to unscrew the screws completely and does not risk to lose them by mistake, which is very useful in case of wirings in uncomfortable position. Finger protection terminals Retained screws Finger protection terminals All terminals in the contact blocks have a protection degree IP, in accordance with the standard IEC 9, therefore they are protected against access to dangerous parts with diameter over mm. Clamping screw plates for different diameter cables These clamping screw plates have a particular roofing tile structure and are connected loosely to the clamping screw. In this way, during the wires fixing, the clamping screw plate is able to suit to cables of different diameter (see picture) and tends to tighten the wires toward the screw instead of permitting them to escape towards the outside. Self-lifting clamping screw plates Switches with this feature have clamping screw plates that go up or down turning the clamping screw, permitting an easy and quick wiring. Contact material: gold-plated silver alloy The contact blocks can be supplied with silver electric contacts with a special gold-plated surface, with total gold thickness of one micron. This type of treatment can be useful in environments which are aggressive against silver (very humid or sulphurous atmospheres) and in case of very small electric charges, usually with low voltages and supply currents. The gold thickness used has been studied for resistance to millions of mechanical cycles. General Catalog 0-0 page /

23 Contact block technology and reliability Sometimes, hardly ever, an electric contact may not work. A commutation failure is a typical consequence of an occasional presence of a high resistance on the contacts due to dust, a slight layer of oxidation, or impurity of any kind that remains inside the switch during its wiring. The repeatability of this type of phenomena depends not only on the switch, but also on the environmental working conditions and the type of load the switch drives. These effects are more evident with low electrical loads, when the electric voltage does not succeed in perforating thin layers of oxide or small dust grains. This type of malfunction may be accepted in the hand-operated devices, because it is enough to repeat the operation in order to make everything work again. This is not the case with position switches, where a failure in a switch could cause considerable damage to the machinery. In the following table we refer to two typical contact structures (type A and B) normally used in the industry and the ones which have been used by Pizzato Elettrica for several years in most of the switches: movable contacts with double interruption and twin (type C). As you can see from the table below, this last structure (type C) features the same contact resistance (R ) of the simple mobile contact (type A), but with a much lower probability of failure (fe). In fact, defined x the probability of a single interruption failure, it results that in the contact type A the commutation failure probability fe=x, in the type B fe x, whereas in the type C it is fe x. This means that if in a certain situation the probability of a single interruption failure x is equal, for instance, to x - ( failed interruption every.000) we will have: - In type A one failed commutation every In type B one failed commutation every In type C one failed commutation every Type Figure Description Contact resistance R Probability of failure fe A simple contact R=Rc fe=x B contacts with double interruption R= Rc fe=x-x C contacts with double interruption and twin R= Rc=Rc fe=x -x +x page / General Catalog 0-0

24 Operation voltage and current for reliable switching The electric contact reliability depends on a lot of elements that change their effect in accordance with the load type. For high power loads it is essential that the contact should be able to eliminate the heat created during switching. For low power loads, instead, it is important that oxides or other impurities do not obstruct the passing of the electric signal. The choice of the electric contacts material is a compromise between different and sometimes opposing requirements. For position switches contacts it is usually used a silver alloy that has resulted suitable for switching of loads in the range between about KW and 0, W. Moving below this power range, it is possible to have some effects because of the oxide naturally created by silver on contact with the air; just as possible contaminations or impurities in the contact switching chamber, for example the talc powder in wires sheathes that an installer could accidentally insert in the switch, become very important. It is not possible to define a fix threshold beyond which the missing switching phenomenon does not appear, because there are a lot of mechanical end electric parameters that influence this value. For example, a good twin electric contact in laboratory is able to switch without signal loosing loads of about microw for dozens of millions of handling operations. However, this does not mean that the same contact is able to provide the same services when the switch operates in an area with sudden changes of temperature (condensate formation) or with few switchings (oxides formation). To avoid part of this type of problems, for very low loads are used gold plated contacts, profiting from the non-oxidability of this material. The thickness of the gold-plating should be adequate to be mechanically resistant to switching and to be electrically resistant to possible sparks that may vaporize it. It is for this reason that Pizzato Elettrica uses micron thickness gold plating suitable for millions of working cycles. Gold platings with lower thickness have simply an aesthetic function, suitable only for protection of the product against oxidation when kept in stock for long time. The minimum current and voltage values suggested by Pizzato Elettrica are readable on the diagram below, divided in two areas defined by a steady power limit. These values identify voltage and current combinations with high commutation reliability in most industrial fields. The lower voltage and current limits shown in the diagram are typical minimum values in industrial application that may also be reduced in not generical conditions. It is recommended, however, to always evaluate that the power signal to commutate should be at least one magnitude order higher than the noise produced in the electric circuit, in particular when circuit cables are long and pass through areas with high electromagnetic fields, especially with signal powers lower than mw. Application field for contacts made of gold-plated silver alloy contacts Application field for silver alloy contacts 00 V 00 V Insulation voltage limit Operating voltage (V) 0 V 0 mw 0 mw Thermal current limit V V ma ma 0 ma A Operating current (A) 0 mw Suggested limit for general applications with snap action contact blocks with silver alloy contacts. 0 mw Suggested limit for general applications with slow action contact blocks with silver alloy contacts. General Catalog 0-0 page /

25 Classification of the contact blocks according to the standard IEC 9-- Form Figure Symbol Description X Y Contact component having double gap with two terminals. C Change-over contact component having simple gap with three terminals. Za Shifting contact component having double gap with four terminals. Contacts have the same polarity Zb Shifting contact component having double gap with four terminals. Moving contacts are electrically separated Electrically separated contacts Symbol + between contact forms (e.g. X+X, Za+Za, X+X+Y, etc.) indicates the combinations of simple contact blocks electrically separated between each other. The electrically separated contacts allow the application of different voltages on the contacts and the connection of loads on different polarities (figure ). Prescriptions and restrictions for Za contacts Electrical loads must be connected to the same phase or polarity. The contacts are not electrically separated, connection of different voltages between the NC contact and the NO contact is not allowed. Also, as prescribed by the standard IEC 9-- paragraph K..., if Za contacts with positive opening for safety applications are used, the following restrictions have to be adopted: If the control accessory has shifting contacts components with form C or Za, you have to use only one contact component (closure or cutoff). In case of shifting contact with form Zb, both contacts may be used... Zb form contact 0 V VAC Za form contact 0 V VAC 0 V VAC load A load A load A load B load B load B 0 V VDC figure : correct figure : correct figure : incorrect page / General Catalog 0-0

26 9 Contact block with dependent action: slow action and snap action with slow action: component where the speed of the contact movement (V) depends on the speed of the switch actuation (V). The contact armature advances at a rate proportional to the actuation speed. The slow action contact block is suitable for applications having low to medium currents and quick actuation movements. It has no differential travel. Contact block with snap action: component where the speed of the contact movement (V) doesn t depend on the speed of the switch actuation (V). After reaching a predetermined point in travel, the contact armature snaps causing the contacts switching. The snap action contact block is suitable for applications having high currents and/or slow actuation movements. This kind of contact block has a differential travel. Contact block: diagrams of the force on the contacts The following diagrams shows the relationship between of the force exerted on the contacts (F) compared to the switch armature travel. Force (F) Force (F) NC opening NO closing 0 Travel (mm) 0 Travel (mm) with slow action Force (F) Force (F) Differential travel Differential travel NC opening travel NC closing travel NC opening travel NC closing travel 0 Operation Reset point point Travel (mm) with snap action,,. The pressure on the contact remains constant while approaching to the snap point. 0 Travel (mm) Operation Reset point point with snap action,. The pressure on the contact decreases while approaching to the snap point. General Catalog 0-0 page /

27 Contact block Contact diagram Linear travel diagram Contact form Contact type Positive opening Contact technology Retained screws Finger protection terminals x() x Za+Za snap action no Double gap no no Za snap action no Double gap no no Zb snap action Zb slow action Zb slow action NC 0. S. Y slow action Y+Y slow action 0. X+X slow action no 0 0. Y+Y snap action 0.9. X+X snap action no Y+Y slow action Y+Y slow action 0. X+X slow action no 0 Y+Y slow action NO Zb slow action Y+Y+X slow action NC 0. Y+Y+Y slow action +NC NO Y+X+X slow action Y+Y+X slow action 9 NC 0.. Y+Y+Y slow action 0 +NC 0.. Y+X+X slow action 0. Zb slow action 0. Y+Y slow action Zb snap action no Double gap / / Zb snap action Double gap / / Zb slow action Double gap / / Zb slow action Double gap / / 0 Contact block with poles, with multiple forms of contact. See page / slow action Double gap, simple and double bearing E 0 x PNP electronic no electronic no no page / General Catalog 0-0

28 Contact block Gold-plated contacts Cross section of the conductors Rated insulation voltage Ui Thermal current Ith Utilization categories AC DC Not available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, Not available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, 9 Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, vailable min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) 0 00 Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) 0 00 Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) 0 00 Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) 0 00 Ie (A) Ue (V) 0 Ie (A), 0, 9 Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) 0 00 Ie (A) Ue (V) 0 Ie (A), 0, 0 Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) 0 00 Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) 0 00 Ie (A) Ue (V) 0 Ie (A), 0, Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 00 VAC 00 VDC Ue (V) 0 00 Ie (A) Ue (V) 0 Ie (A), 0, Available / 00 VAC 00 VDC Ue (V) 0 00 Ie (A) Ue (V) 0 Ie (A), 0, 0, Available / 00 VAC 00 VDC Ue (V) 0 00 Ie (A) Ue (V) 0 Ie (A), 0, 0, Available / 00 VAC 00 VDC Ue (V) 0 00 Ie (A) Ue (V) 0 Ie (A), 0, 0, Available / 00 VAC 00 VDC Ue (V) 0 00 Ie (A) Ue (V) 0 Ie (A), 0, 0, 0 Available min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) 0 VAC 00 VDC Ue (V) 0 Ie (A) Ue (V) Ie (A), E / min. x 0, mm ( x AWG ) max. x, mm ( x AWG ) / / Ue (V)... 0 Ie (A) 0, General Catalog 0-0 page /