EUCHNER CETx-AP-xxx-AH-xxx (Unicode) - Manual (Page 18)

Operating Instructions Safety Switch CET.-AP-...-AH-...
18
Caution!
Ì Power devices which are a powerful source of interference must be installed
in a separate location away from the input and output circuits for signal pro-
cessing. The cable routing for safety circuits should be as far away as pos-
sible from the cables of the power circuits.
Ì Please pay attention to any interference fields in case of devices such as
frequency converters or induction heating systems. Observe the EMC in-
structions in the manuals from the respective manufacturer.
Important:
If the device does not appear to function when operating voltage is applied (e.g.
green STATE LED does not flash), the safety switch must be returned unopened
to the manufacturer.
Notes for operation with safe control systems
Important:
Devices with start 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 Outputs OA and OB can be connected to the safe inputs of a control system.
Prerequisite: The input must be suitable for clocked safety signals (OSSD sig-
nals, e.g. from light curtains). The control system must tolerate clock 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 29.
Ì The following applies for single-channel control of the guard locking:
The guard locking (0V UCM) and the control system must have the same
weight.
Ì For two-channel control of the solenoid voltage by safe outputs of a control
system, the following points must be observed (see also Figure 14):
Ì If possible, switch off the pulsing of the outputs in the control system.
Ì For devices with teach-in input J, the input must remain unswitched in normal
operation.
Ì Freely controllable LEDs may only be switched in parallel to the solenoid (i.e.
the LED indicates whether the solenoid is energized).
A detailed example of connecting and setting the parameters of the control system
is available for many devices at www.euchner.de in the download area » Applications
» CET. The features of the respective device are dealt with there in greater detail.