Hirschmann MACH 4000 Series, User Manual

Page: 174 / 236

Operation Diagnostics
174
9.3 Out-of-band signaling
Basic - L3P
Release 3.1 06/07
9.3 Out-of-band signaling
The signal contacts are for
D
controlling external devices by manually setting the signal contacts.
D
monitoring proper functioning of the Switch which makes it possible to
perform remote diagnostics.
A break in contact is reported via the potential-free signal contact
(relay contact, closed circuit):
D
Faulty power supply:
the failure of the supply voltage 1/2,
a continuous malfunction in the Switch (internal supply voltage).
D
Values that exceed or fall below the set temperature threshold.
D
Removing a module.
D
Removing the ACA.
D
The defective link status of at least one port. With the Switch, the indica-
tion of link status can be masked by the management for each port (see
“Displaying connection error messages” on page 70 ). Link status is not
monitored in the delivery condition.
D
HIPER-Ring event:
the loss of redundancy guarantee (in Redundancy Manager mode). Ring
redundancy is not monitored in the delivery condition.
D
Redundant Ring/Netcoupling event:
the loss of redundancy guarantee. Ring redundancy is not monitored in
the delivery condition.
In Stand-by mode the Switch reports additionally the following conditions:
– the faulty link status of the control line
– partner device is in stand-by mode
It depends on the management setting which events cause a contact to
switch.
Note: With non-redundant supply of the mains voltage, the Switch reports a
power failure. You can prevent this message by applying the supply voltage
over the two inputs or by switching off the monitoring
(see “Monitoring correct operation via the signal contact” on page 176 ).