22
MACH 4002
Release
1.0
10/05
2.1.9 Connecting the terminal block for signal contact
Fig. 4: 4-pin signal contact
D The signal contact (“FAULT”) 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 set 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 < 24 V).
D A continuous malfunction in the device.
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 signal lines.
FAULT
RL2
RL1
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