Info card. Ultrasonic sensors

Transcription

1 i This info card serves as a supplement to the main position sensors catalogue and to the individual data sheets. For further information and contact addresses please visit our homepage at Operating principle of an ultrasonic sensor 5 6 : Connection : ousing : Electronics : Sound transducer 5: Sound waves 6: Object / reflector UK Active zone Blind zone Area in front of the sensing face in which the sensor reacts to the approach of objects. Close range in front of the sound transducer which allows no time of flight measurement Output function Normally open: Object in the active zone > output switched. Normally closed: Object in the active zone > output locked. Programmable: Choice between normally closed or normally open. Positive switching: Positive output signal (to -). Negative Negative output signal (to ). switching: 768 / / 8 Rated insulation voltage Rated short-circuit current Rated impulse withstand voltage Power-on delay time Operating voltage Utilisation category ysteresis Short-circuit protection DC units with protection class III: 6 V DC For short-circuit-proof units: A DC units with protection class III: 6 V DC:.8 kv ( overvoltage category II) The time the sensor needs to be ready for operation after application of the operating voltage (in the millisecond range) < ms. Voltage range in which the sensor operates reliably. A stabilised and smoothed direct voltage should be used. Take into account the residual ripple. DC units: DC- (control of solenoids) Difference between switch-on and switch-off point. ifm sensors which are protected against excessive current by means of a pulsed short-circuit protection. The inrush current of incandescent lamps, electronic relays and low resistance loads may cause this protection to cut in and turn the sensor off!

2 Important terms Ultrasonic reflector Product standard IEC Switch point drift Current consumption The functional specifications refer to a mild steel reflector defined by ifm at maximum range with an edge length of mm. Besides mild steel reflectors, objects that can reflect sound well can also be used as a reflector. The min. reflector size depends on the object size and the angle of aperture of the emitted sound. The shifting of the switch point due to changes in the ambient temperature. Current for the internal supply of DC units. UGT : Sensor : Target (object to be detected) : Sensing range : Blind zone UGR : Sensor : Target (object to be detected) : Reflector : Min. distance object / reflector 5: Sensing range

3 Minimum distances for the installation of identical units Opposite installation of ultrasonic sensors X UK Version Range [mm] Distance X [mm] M8 standard M8 short / M8 Cube 8 8 Side-by-side installation of ultrasonic sensors Y Version Range [mm] Distance Y [mm] M8 standard M8 short / M8 Cube i It is imperative to check the reliable function in the selected application.

4 Description response curves [mm] [mm] : Distance : Detection zone *) : Switch-on curve **) : Target x mm ***) 5: 5 % of the target in the detection zone 6: Switch point *) If half of the target face (standard target) is within the detection zone, the sensor can determine distance values. **) The switch-on curve describes the switch-on point when the edge of the target (standard target) approaches laterally. ***) Depending on the range. The sensor switches according to the switch point setting made via or IO-ink. IO-ink * ) General information This unit has an IO-ink communication interface which requires an IO-ink-capable module (IO-ink master) for operation. The IO-ink interface enables direct access to the process and diagnostic data and provides the possibility to set the parameters of the unit during operation. In addition, communication is possible via a point-to-point connection with a USB adapter cable**). Further information about IO-ink at Device-specific information You will find the IODDs necessary for the configuration of the IO-ink unit and detailed information about process data structure, diagnostic information and parameter addresses in the download area of the respective sensor at Parameter setting tools You will find all necessary information about the required IO-ink hardware and software at *) Depending on the type selected **) Article no. E9

5 Connection systems Wiring example * ) x pnp x npn UK x pnp x npn - x pnp + x input x npn + x input x pnp + x analogue x npn + x analogue x analogue + x BK: Black BN: Brown BU: Blue W: White BN W OUT BK BU OUT Colours to DIN EN OUT: Switching output / IO-ink *) OUT: Switching / analogue output *) *) Depending on the type selected (see data sheet)

6 Setting aid IO-ink ultrasonic sensors UGT/UGR Type Parameter Value Explanations Factory settings UGT UGT UGT UGT UGR UGR UGR Background suppression Config. ogic Config. Mode Config. yst Teach SP TP / Teach SP TP Switch-On delay Switch-Off delay Param. Param. Param. Param. Background value oc on off igh active ow active Point Window Point... mm virtual button Activate and deactivate the background suppression. Sets the switch point just in front of the background. Only possible in the Point mode. Configuration of switching signal channel : Switch point logic / logic for target detected. igh active: normally open (NO) ow active: normally closed (NC) Configuration of switching signal channel : Selection of the functions for. Point: Sensor switches before the taught point. Window: Sensor switches in the selected area. Point: Sets a switch-on point () and a switch-off point () Configuration of switching signal channel : Setting of the hysteresis. Virtual button. Sensor detects the current sensing range for the selected point. (off) (igh active) (Point) or (Window)* *Depending on the article no. UGT (5 mm) UGR ( mm)... ms Adjustable start-up delay (max., ms). ( ms)... ms Adjustable switch-off delay (max., ms). ( ms)... mm Manual entry of switch point. (max. range)... mm... mm Manual entry of switch point. only works if " Config. Mode" is not set to the one-point mode Manual entry of switch point on the reflector. Sensor switches on all distances before this point. - (min. range) n.a. No selection possible for UGRxxx mm oc uoc Power cycles #number Distance to the background. Background value must be greater than ( + yst). Background value is set via ing. ocking or unlocking of the key on the sensor. Number of switching operations since delivery. Operating hours [h] Operating hours since delivery (uoc) -

7 Type Parameter Value Explanations Factory settings Effect of the filter selection FIT OW MEdi IG OW MEdi IG Filter (MEdI) UK : The lower the filter, the higher the susceptibility to failure. : The lower the filter, the higher the switching frequency. : The higher the filter, the longer the response time. Versions Switching frequency (z) / Analogue response time (ms) OW MEdI IG UG, mm 5 UG, 8 mm UG, mm 5 UG, 6 mm 7/5 6/ / /8 UG, mm 5/5 / / /8

8 Switch point definition IO-ink for UGR Normally open: (switch point logic = ) = - ( x.) + + BDC Normally closed: (switch point logic = ) = - ( x.) + + SP Switch point ysteresis SwitchingSignalChannel ProcessDataVariable Reflector

9 Switch point definition IO-ink for UGT Single point mode to smart sensor profile + UK Normally open: + (switch point logic = ) + Normally closed: + (switch point logic = ) Window mode to smart sensor profile - + Normally open: + + (switch point logic = ) window window

10 - + Normally closed: + + (switch point logic = ) window window Two-point mode (presence detection) to smart sensor profile Normally open: (switch point logic = )

11 Normally closed: (switch point logic = ) i Condition: > UK Background suppression B Normally open: (switch point logic = ) = - x + B Normally closed: (switch point logic = ) = - x + SP B Switch point ysteresis SwitchingSignalChannel ProcessDataVariable Background suppression

12 Representation of the process value with measuring range and setting range with front damping 7 [] [mm] : Process data value : Setting range [mm] (process data value) : Blind zone : Setting range 5: Target distance [mm] 6: Measuring range 7: Marking of invalid measured values