Hirschmann RS20 Series User Manual page 19

Note: With non-redundant supply of the mains voltage, the device reports
a power failure. You can prevent this message by applying the supply
voltage over the two inputs or by changing the configuration via manage-
ment.
Signal contact
U
D
The signal contact ("FAULT", pin assignment of the terminal block see
Fig."Connection of the supply voltage on the 6-pin terminal block" on
page 17) monitors proper functioning of the device, thus enabling
remote diagnostics. You can specify the type of function monitoring in
the Management.
D
You can also use the Management to switch the signal contact
manually and thus control external devices.
A break in contact is reported via the potential-free signal contact (relay
contact, closed circuit):
D
The failure of at least one of the two supply voltages (supply voltage 1
or 2 < 9,6 V).
D
A continuous malfunction in the device (internal 3.3 VDC voltage).
D
The defective link status of at least one port. With the device, the indi-
cation of link status can be masked by the management for each port.
Link status is not monitored in the delivery condition.
D
The loss of Redundancy guarantee.
D
Error during self-test.
The following conditions are reported in stand-by mode
D
Control cable disrupted
D
Control cable shorted
D
Partner device is in stand-by mode
The following conditions are reported in normal mode:
D
Control cable shorted
D
Partner device is in normal mode
The following condition is reported in RM mode additionally:
D
Ring redundancy guaranteed. Ring redundancy is not monitored in the
delivery condition.
V Pull the terminal blocks off the device and connect the power supply
and signal lines.
18
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RS20/RS30
Release 2.0 03/06