Hirschmann RS20 Reference Manual page 85

Diagnosis
In the "Mode Signal contact" field, you select the "Monitoring correct op-
eration" mode. In this mode the signal contacts monitor the functions of
the device, thus enabling remote diagnosis.
A break in contact is reported via the potential-free signal contact (relay
contact, closed circuit):
Voltage supply 1/2 failure or continuous device malfunction (internal volt-
age). Select "Monitor" for the power supply if the signal contact should re-
port the failure of the voltage supply or the internal 3.3 VDC voltage.
The temperature threshold has been exceeded or has not been reached
(see on page
the signal contact should report an impermissible temperature.
Removing a module. Select "Monitor" for removing modules if the signal
contact is to report the removal of a module (for modular devices).
Fan failure (for devices with a fan).
The removal of the ACA. Select "Monitor" for ACA removal if the signal
contact is to report the removal of an ACA (for devices which support the
ACA).
The defective link status of at least one port. The reporting of the link sta-
tus can be masked via the management for each port in the device. Link
status is not monitored in the state on delivery. Select "Monitor" for con-
nection errors if the signal contact is to report a defective link status for at
least one port.
Redundancy failure in the redundant ring
dancy"). Select "Monitor" for the ring redundancy if the signal contact is to
report a redundancy that no longer exists in the redundant ring.
In RM mode, the device also signals the following state:
Redundancy existing. State on delivery: ring redundancy is not
monitored.
RM Web L2B
Release 5.0 04/09
17 „System data"). Select "Monitor" for the temperature if
7.6 Signal contact
(see on page 68 „Ring Redun-
85