Signaling Contact - Siemens SIMATIC NET Operating Instructions Manual

6.3

Signaling contact

Information on the signaling contact
● The terminal block can be removed from the device to allow cables to be connected.
● A relay with floating contacts is available for the signaling contact on the 5-terminal block
on the top of the module.
● Limit values for the signaling contact:
– Maximum switching voltage 50 VDC; 30 VAC
– Maximum switching current 1.0 A
● The voltage connected to the relay must be a safety extra-low voltage according to IEC
60950-1 / EN 60950-1 / VDE 0805 and must meet the requirements of NEC, Class I in
accordance with the UL/CSA approval.
● Terminal assignment of the 5-terminal block:
– Terminal F1
– Terminal F2
NOTICE
Damage due to voltage being too high
Please make absolutely sure that the terminals of the 5-terminal block are connected
correctly. Make sure there is adequate electrical insulation of the connecting cables to the
signaling contacts, especially if you are using voltages higher than 32 V.
Connecting up incorrectly can lead to the destruction of the modules.
Signaling faults/errors
● The signaling contact signals problems in the network and on the modules.
● If a problem occurs, the contact is opened. This means that a total power outage is also
signaled. The figure shows the contact in the de-energized state.
● The problems indicated by the signaling contact are listed in the section "LED display
(Page 13)".
Optical link module
Operating Instructions, 01/2020, C79000-G8976-C270-06
Connection
6.3 Signaling contact
47