User Manual

Operating Instructions Safety Switches CES-AR-C.2-CH
19
Notes for operation with safe control systems
Important!
Devices with star t button and feedback loop are not suitable for connection to
safe control systems.
Please observe the following requirements for connection to safe control systems:
Ì Use a common power supply for the control system and the connected safety
switches.
Ì A clocked power supply must not be used for UB. Tap the supply voltage
directly from the power supply unit. If the supply voltage is connected to a
terminal of a safe control system, this output must provide sufficient electrical
current.
Ì Always connect inputs IA and IB directly to a power supply unit or to outputs
OA and OB of another EUCHNER AR device (series connection). Pulsed signals
must not be present at inputs IA and IB.
Ì Outputs OA and OB can be connected to the safe inputs of a control system.
Prerequisite: The input must be suitable for pulsed safety signals (OSSD sig-
nals, e.g. from light curtains). The control system must tolerate pulses on the
input signals. This normally can be set up by parameter assignment in the
control system. Observe the notes of the control system manufacturer. For the
pulse duration of your safety switch, please refer to the section Typical system
times on page 24.
A detailed example of connectin g and setting th e parameters of the con trol
system is available for many devices at www.euchner.de in the download area »
Applikationen » CES. The features of the respective device are dealt with there in
greater detail.