Project Engineering
52
Note that:
• The restart inhibit (RES) is parametrized on the receiver.
• Enable via the signal sequence (RES input) 0
1
0
• The 1-signal must last for 0.1 s…4 s.
• If the restart inhibit is deactivated, safety operating mode / automatic restart is activated automatically.
5.2.3.3 Contactor Monitoring (EDM)
• The contactor monitoring carries out dynamic monitoring of the switching behavior of externally connected
NC contacts.
• After every switch-on and switch-off process of the OSSDs, the feedback signal must have the correct
switching status within the specified time.
• This enables malfunctions on the contactors (e.g. welding of the contacts) to be detected.
• The contactor monitoring (RES) is parametrized on the receiver.
• If the connected contactors do not switch in the expected time, the ESPE switches to safe state
(OSSD OFF, ERROR).
• This function only works in a safety-related way if the contactor has positive-guided NC contacts.
5.2.3.4 Beam Coding
• To avoid mutual interference, it is important to ensure that, for systems in close proximity to each other, a
receiver is only reached by the light from the corresponding emitter.
• If this cannot be prevented through mechanical shielding or through the installation (see
), beam coding can help here.
• If the beam coding is parametrized on the emitter and receiver, the receiver can differentiate between
beams from its designated emitter and beams from other emitters.
Emitter
Emitter
Receiver
Receiver
