EUCHNER CETx-AR-xxx-CH-xxx (Multicode) - Manual (Page 39)

Operating Instructions Safety Switch CET.-AR-...-CH-...
39
Typical system times
The specified times are maximum values for AR switch chains with 20 devices.
Individual devices have shorter system times.
Ready delay: After switching on, the unit carries out a self-test for 8 s. The system
is ready for operation only after this time.
Switch-on time of safety outputs: The max. reaction time from the moment
when the safety guard is locked to the moment when the safety outputs switch
on T
on
is 400 ms.
Simultaneity monitoring, safety inputs IA/IB: If the safety inputs have different
switching states for longer than 150 ms, the safety outputs OA/OB will be switched
off. The devices switches to fault state.
Risk time according to EN 60947-5-3: If an actuator moves outside the op-
erating distance, the safety outputs OA and OB are deactivated after a maximum
of 500 ms.
Difference time: The safety outputs OA and OB switch with a slight time offset.
They have the same signal state at the latest after a difference time of 10 ms.
Clock pulses at the safety outputs: The device generates its own clock signal
on the output lines OA/OB. A downstream control system must tolerate these
pulses, which may have a length of up to 1 ms.
This can usually be set up in the control systems by parameter assignment. If
parameter assignment is not possible for your control system or if shorter clock
pulses are required, please contact our support organization.
The pulses are also output when the safety outputs are switched off.