b'K series Roller CamsPassive Return Device (PRD) To certain that the roller cam has returned to its initial position, READY recommends the use of a PRD inductive sensor as a passive return device. Then if the gas spring fails and the cam does not return when the press ram goes back up, an alarm or a press shutdown can be activated. 1 + PNP4 _ 3 1 + NPN 4 4 13_ 3 ReferenceTypeFunctionNominal sensing distanceSupply voltageSwitching capacityHow to order PRD-1NO PNP PRD-1-R PRD-2NC 2mm 12.24VDC200mA RC PRD-3NO NPN ModelConnector PRD-4NC Active Return DeviceARD 1 A gas spring is used to retract the cam. The force is adjusted in such a way that it is sufficient to slide the carriage back to its starting position. Depending on the operation, adding an active return can contribute to a higher degree of safety. For this purpose, the cam slide has a slot to accommodate an extractor hook for the active return, with which the cam slider is pulled backwards with higher separating forces, coming into operation in case of a gas spring failure.The extractor hook is fitted in its housing and secured with a screw, as shown. The adjacent illustrates oneReferenceCam Model option among a number of possible pusher designs. The customer is responsible for the construction of theARD-3-1RTRC3000 / RTRCS3000 pusher support. The extractor hook is available as anARD-5-1RTRC5000 / RTRCSS5000 accessory at READY.ARD-15-1RTRCS15000 4Product improvement through research and development is an ongoing process. All specifications are subject to change without notice.'