Proximity Switches RS (Reed Switch) - Origa

1 Direct VoltageInductive LoadProtection: DiodeDirect andAlternating VoltageCapacity LoadProtection:Series ResistanceAlternating VoltageInductive and/orCapacity LoadProtection: RC Switches RS (Reed Switch) GeneralPneumatic systems can often be combined with electriccontrol circuits. The position of the piston in the cylindercan then be sensed by means of a Proximity switchwhich delivers signals to the control system. The Origa type RS Proximity switch is a non-contacting, electricsensor integrated with the cylinder. No external camsor other mechanical actuating devices are cylinder, incorporating the required number ofswitches, is a complete unit which is ready for type RS Proximity switch consists of a reed switchwhich is actuated by a permanent magnet in the snap action of the contacts on closure ensuresdistinct and reliable reed switch is encapsulated and is enclosed in analuminium case, to which the connecting cables aresecurely clamped.

2 The design is very sturdy and thereed Switches used can withstand high mechanical andelectrical loads. The Proximity switch consists of anencapsulated reed switch and an associated Proximity Switches can therefore be very easilyadjusted to operate at the required point along the pis-ton stroke. All parts of the Proximity switch are madeof corrosion resistant accuracy of a control system is dependent on therepeatability, hysteresis and dynamic error of the com-ponents. The repeatability of the reed Switches usedfor the Origa Proximity Switches is excellent In practice, the repeatability of a control system isdetermined by other components, such as by the varia-tions in the operating points of associated relays andvalves.

3 The variations in the operating points of relays,valves and sensors are additive. Hysteresis is the direc-tional dependence of the operating point, theswitch is actuated at a slightly different piston positionwhen the piston is moving in one direction than it iswhen the piston is moving in the opposite direction. An inherent feature of the reed switch is that the dis-tance between these operating points is large. If anidentical operating point is required, regardless of the direction of travel, two Proximity Switches - one oneach side of the cylinder - can be used. These Switches can then be connected across logic circuits which willselect the appropriate switch when the piston is movingto the right or to the left.

4 Positional deviations in thepositioning of the piston, for instance, will occur whenthe piston speed, its load or the compressed air supplypressure is varied (dynamic error).Electrical Useful LifeThe electrical useful life of the reed switch is determinedby a number of factors, such as the breaking load, typeof load and the type of electric power. The reed switch -es used have a high nominal rating of 35 watts( 10:10 Watt). The electrical useful life is normally 3 - 6x106switching operations at 35 Watt ( 10:10 Watt). At a lower load, the useful life is extremely high(more than 100x106switching operations). The tran-sients occurring in switching inductive loads (relaycoils, solenoid valves, contactors) should be suppressedby means of diodes, RC circuits or varistors (voltage-dependent resistors).

5 A diode connected in parallelwith the load offers an inexpensive and reliable methodof spark-suppression, although this can only be used RC circuits and varistors can be used for , but these are more expensive and must becarefully matched to the circuit. Note that all types ofspark-suppression devices across solenoid valves andrelays cause some measure of drop-out delay. In thecase of resistive loading with high inrush current (suchas incandescent lamps), a protective resistor should befitted in series with the load. Protective resistors shouldalso be used when the cables are very long and thevoltage is in excess of 100 the above reasons, a universal instrument (ohmme-ter) or LEDs should be used for adjustment and check-ing of Origa Proximity Switches .

6 +=_ = DataProximity switch RSManufacturerORIGATypeRSSwitching ConfigurationNormally OpenMaximum Contact Rating35 Watts( 10mm = 10 Watts)Maximum Voltage250 Volts AC/DCMaximum Starting Amps( 10mm = .5 Amps)Hysteresis (integral)Approx. 8mmTemperature Range-20 F to +175 FEnclosure ClassIP 65 Housing MaterialAnodized AluminumLoadReed SwitchPower SourceBrownBlueGreen w/Yellow Stripe+Hook Up Diagram304717232676-0201/5 2676-0301/5 2676-0301/5 2676-0501/5N/AN/AN/A2690-0301/5 2690-0301/5 2690-0501/5N/A12712689-0201N/AN/AN/AReed Switches (RS) - Series 2000 (ref. page )Type RS (without LED)5 Meter CableType RS (with LED)5 Meter CableSensor Clampw/Set ScrewPart NumberPart NumberPart NumberBore Sizes10mm16mm25mm32mm40mm50mmDesignation Ordering Procedure - Reed Switches (RS) - Series P120 (ref.)

7 Page )Series P120 RSQ-120 switch Qty. - Second TrackSwitch Qty. - First TrackNumber of tracks:1 = Left side (port side)2 = Left and right sideSwitch Type:RSA, RSD, RSF, RSQG round wire not included on 10mm and 16mmWhite on 10mm and systems can often be combined with electriccontrol circuits. The position of the piston in the cylin-der can then be sensed by means of a Proximity switchwhich delivers signals to the control Origa Type IS Proximity switch is a non-contact-ing electric sensor integrated with the cylinder. Noexternal cams or other mechanical actuating devicesare necessary. The cylinder, incorporating the requirednumber of Switches , is a complete unit which is readyfor basic principle of the hall effect sensing element isa high frequency oscillator circuit which is influencedby the magnetic field of the piston.

8 With a definedmagnetic field density the bounce free output signal issupplied via a flip-flop and an output stage and is indi-cated by the LED. The output signal can beprocessed into a control signal and is particularly suit-able for signal input in programmable electrical operation no moving parts wear signal output. Unaffected by shaking andvibration. High switching frequency. Built-in LED. Shortcircuit protected switching output with integral protec-tive circuit. Low switching IS switch is enclosed in an aluminium case towhich the connecting cables are securely clamped .The Proximity switch and its associated mounting Proximity Switches IS(Hall Effect switch with LED)clamp is mounted in the grooves along the cylinder.

9 The Proximity Switches can therefore very easily beadjusted to operate at the required point along the pis-ton stroke. All parts of the Proximity switch are madeof corrosion resistant accuracy of a control system is dependent on therepeatability, hysteresis and dynamic error of the com-ponents. The repeatability of the hall effect switchesused for the Origa IS Proximity Switches is excellent in. In practice the repeatability of a control sys-tem is determined by other components such as by thevariations in the operating points or relays and valvesand sensors are additive. Hysteresis is the directionaldependency of the operating point the switch isactuated at slightly different piston position when thepiston is moving in one direction than it is when thepiston is moving in the opposite direction.

10 With halleffect Switches the difference between those operatingpoints is very small. If an identical operatingpoint is required, regardless of the direction of travel,two Proximity Switches (one on each side of the cylin-der) can be used. These Switches can then be connect-ed across logic circuits which will select the appropri-ate switch when the piston is moving to the right or theleft. Positional deviations in the positioning of the pis-ton, for instance, will occur when the pistonspeed, its load or the compressed air supply pressureis varied (dynamic error).Electrical Service LifeBecause of the fully electronic mode of operation theelectrical service life is theoretically unlimited. The ISsensor has integrated protection against inductive volt-age peaks and is short circuit protected.