Capacitive BEROs. 6/2 Introduction. 6/4 DC 10 to 65 V. 6/6 AC 20 to 250 V

Transcription

1 /2 Introduction / DC 0 to 5 V / AC 20 to 250 V

2 Introduction Area of application Design The BEROs are available in DC or AC versions. 7 The DC versions can activate electronic controllers (SIMATIC) or relays directly. 7 With the AC version, the load (contactor relay, solenoid valve) is connected directly to the AC supply network (preferably 20 V, 50 Hz) in series with the BERO. Functions The sensing face of a capacitive sensor is formed by two concentrically arranged metal electrodes that are equivalent to the electrodes of an unwound capacitor. The electrode surfaces A and B are connected into the feedback branch of a high-frequency oscillator that is tuned such that it does not oscillate when the surface is free. A+ BERO RG capacitive proximity switches are position switches that operate without contact. They detect electrically conductive or non-conductive materials that are in a solid, powder or liquid state, e.g. glass, ceramics, plastic, wood, oil, water, cardboard and paper. The BERO switches when the material is at a specific distance from the sensor. Standard applications for BERO capacitive proximity switches are 7 evel control in plastic or glass containers 7 evel monitoring in transparent packaging 7 Winding wire breakage signaling 7 Tape breakage signaling 7 Bottle counting 7 Tape loop control and tape tension control 7 Item counting of any kind. Examples When an object approaches the active face of the sensor, it enters the electric field in front of the electrode surfaces and causes a change in the coupling capacitance. The oscillator starts to oscillate; the amplitude is recorded by an evaluation circuit and converted into a switching command. Switching frequency The build-up characteristics specific to other pulse/interval conditions may result in higher switching frequencies than those specified. Operating distance The stated values are applicable to a target of metal which is grounded and whose area corresponds to the sensing face of the BERO. The real operating distance s r for non-conductive targets is dependent on the relative dielectric constant ε r and the characteristic value (see characteristic curve). 80 r 0 B- NSD0072 Recognition of milk in cartons %00 s r NSD00722 evel control for bulk material in vessel Standards The same standards are applicable as for the inductive BEROs. /2

3 Introduction Dielectric constants of various materials Material ε r Material ε r Alcohol Araldite Bakelite Glass Mica Vulcanized rubber Hard paper Wood Cable insulating compound Air, vacuum Marble Oiled paper Paper Paraffin Petroleum Plexiglas Polyamide Polyethylene Polypropylene Polystyrene Polyvinylchloride Porcelain Pressboard Quartz glass Quartz sand Silicone rubber Teflon Turpentine oil Transformer oil Vacuum, air Water Soft rubber Celluloid Built-in protection The protective circuits built into the DC versions make them easy to handle and protect the devices from damage. Spurious signal suppression Short-circuit and overload protection Polarity reversal protection for connections Inductive interference protection Type DC AC Operating voltage (0) V V Residual ripple Max. 0 % No-load supply current I ma Max..7 ma Switching frequency f 00 Hz 20 Hz Repeat accuracy R Max. 2 % Differential travel H 0.02 to 0.2 s r Outputs: Rated operating current I e For DC 200 ma For AC 20 V (contactor up to size S) - Continuous 500 ma - Up to 20 ms 5 A Smallest operating current I m Mainly inductive load 0 ma Mainly resistive load 5 ma Residual current I r... 2 ma Max..7 ma Voltage drop Max..8 V Max. 7 V ead length, max. permissible 00 m Degree of protection IP7 Ambient temperature Operation C Storage C Shock resistance 0 g, ms duration Resistance to vibration Hz, mm amplitude Circuit diagrams DC AC Fig. Fig. Fig. 5 NSD0072 K BN BK BU BN K BK E WH E2 BU oad E2 deactivated (NC function) oad E deactivated (NC function) e.g. contactor relays, solenoid valve NO or NC function according to type Fig. 2 Fig. Fig. NSD00727 K E E NSD0072 E 2 E2 oad E2 deactivated (NC function) NSD0072 K K / 2/ NSD00725 NSD00728 K BN BU E N GNYE PE/S E N(2) oad E deactivated (NC function) NO or NC function, programmable /

4 DC 0 to 5 V No. of onnecting wires Design M 8 Cubic 20 mm 2 mm M 0 Embeddable in metal Shielded Shielded Shielded Rated operating distance s n ) 5 mm 5 mm 0 mm Real operating distance s r 2) Adjustable Fixed comparison Adjustable Enclosure material Molded plastic Metal Metal with molded-plastic head Operational voltage (DC) V Rated operating current I e ma Displays Switching status Red ED Yellow ED Red ED Operating voltage range Green ED Degree of protection IP7 IP7 IP7 Type RG 0AB00 RG 7.AG00 RG 0AC00 ) For target made of earthed metal. 2) With an alignment s r > s n, the differential travel can increase significantly. Selection and ordering data Switching output Circ. diag. No. Connector type kg kg kg With 2 m cable, iyy 0.5 mm mm 2 0. mm 2 NO contact, pnp A RG 0AB00 unit 0.2 A RG 7 0AG00 unit NO and NC contacts, A RG 0AC00 unit 0.28 pnp (antivalent) With connector, Ø 8 mm NO contact, pnp 2 A, C A RG 7 7AG00 unit 0.02 Dimension drawings RG 0AB00 & RG 7 0AG RG 0AC00 # ED 2 NSD007 5, % = # 5 9 % ø,, RG 7 7AG ED 2 NSD0072 5, % ' = 5 9 & ø,, 8 Wherever you find the abbreviation SW in dimension drawings please note that SW means spanner width and Sg means connecting thread. Characteristics metal, 20 mm 20 mm mm, metal, 20 mm 20 mm mm, metal, 0 mm 0 mm mm, /

5 DC 0 to 5 V No. of connecting wires Design M 0 Ø 0 mm Cubic 0 mm 0 mm Embeddable in metal Shielded Shielded Shielded Rated operating distance s n ) 0 mm 20 mm 20 mm Real operating distance s r 2) Adjustable Adjustable Adjustable Enclosure material Molded plastic Molded plastic Molded plastic Operational voltage (DC) V Rated operating current I e ma Displays Switching status Yellow ED Yellow ED Yellow ED Operating voltage range Green ED Green ED Green ED Degree of protection IP7 IP7 IP7 Type RG AC00 RG 55 AC00 RG 0 AC00 ) For target made of earthed metal. 2) With an alignment s r > s n, the differential travel can increase significantly. Selection and ordering data Switching output Circ. diag. No. Connector type kg kg kg With terminal compartment Up to 2.5 mm 2 Up to 2.5 mm 2 Up to 2.5 mm 2 NO and NC contacts, A RG AC00 unit 0.27 A RG 55 AC00 unit 0.7 A RG 0 AC00 unit pnp (compatible) Dimension drawings RG AC00 M 0x,5 RG 55 AC00 ø0 RG 0 AC00 Characteristics ED SW NSD ED NSD Mounting clamp Ø 0 mm included in delivery % # # 2 C # 5, # % = metal, 0 mm 0 mm mm, metal, 0 mm 0 mm mm, metal, 0 mm 0 mm mm, /5

6 AC 20 to 250 V No. of connecting wires 2 + PE Design M 0 Ø 0 mm Cubic 0 mm 0 mm Embeddable in metal Shielded Shielded Shielded Rated operating distance s n ) 0 mm 20 mm 20 mm Real operating distance s r 2) Adjustable Adjustable Adjustable Enclosure material Metal with molded- Molded plastic Molded plastic Molded plastic plastic head Operational voltage (DC) V Rated operating current I e ma Displays Switching status Red ED Red ED Red ED Red ED Operating voltage range Green ED Green ED Green ED Degree of protection IP7 IP7 IP7 Type RG 0B00, RG D00 RG 55 D00 RG 0 D00 RG 0A00 ) For target made of earthed metal. 2) With an alignment s r > s n, the differential travel can increase significantly. Selection and ordering data Switching output Circ. diag. No. Connector type kg kg kg With 2 m cable, iyy 0.5 mm 2 NO contact 5 A RG 0B00 unit 0.2 NC contact 5 A RG 0A00 unit 0.2 With terminal compartment Up to 2.5 mm 2 Up to 2.5 mm 2 Up to 2.5 mm 2 NO or NC contact programmable A RG D00 unit 0.28 A RG 55 D00 unit 0.7 A RG 0 D00 unit Dimension drawings RG 0B00, RG D00 RG 0A00 M 0x,5 # 5, % ' = 5 9 & ED SW NSD RG 55 D00 ø0 ED NSD Mounting clamp with Ø 0 mm included in delivery RG 0 D00 % # # 2 C # 5, # % = Characteristics metal, 0 mm 0 mm mm, metal, 0 mm 0 mm mm, metal, 0 mm 0 mm mm, 7 /