Westermo LD-64 AC Manuel D'installation page 15

Below follows a number of different fault situations which shows the different alarm
outputs.
x
CH1 CH1
LD-64 Slave 1 LD-64 Master
CH2 CH2
CH1 CH1
LD-64 Slave 1 LD-64 Master
CH2 CH2
CH1 CH1
LD-64 Slave 1 LD-64 Master
CH2 CH2
x
CH1 CH1
LD-64 Slave 1 LD-64 Master
CH2 CH2
CH1 CH1
LD-64 Slave 1 LD-64 Master
CH2 CH2
6073-2002
Link 1
CH1 CH1
LD-64 Slave 2 LD-64 Slave 3
CH2 CH2
Link 2
Link 1
x
CH1 CH1
LD-64 Slave 2 LD-64 Slave 3
CH2 CH2
Link 2
Link 1
CH1 CH1
LD-64 Slave 2 LD-64 Slave 3
CH2 CH2
x
Link 2
Link 1
CH1 CH1
LD-64 Slave 2 LD-64 Slave 3
CH2 CH2
x
Link 2
Link 1
CH1 CH1
LD-64 Slave 2 LD-64 Slave 3
CH2 CH2
Link 2
The receiver Rx2 at the master modem
detects an interruption on ring 1. Alarm
output CE1 indicates at the master unit.
The receiver Rx2 on slave modem 3
detects an interruption on ring 1. Alarm
signal CE1 indicates at slave modem 3
and also at the master unit.
The receiver Rx1 on slave modem 3
detects an interruption on ring 2. Alarm
signal CE2 indicates at slave modem 3
and also at the master unit.
The receiver Rx1 on slave modem 3 and
receiver Rx2 on slave modem 1 detects
interruptions. Alarm signal CE2 indicates
on slave modem 3 and CE1 indicates on
slave modem 1. Both CE1 and CE2
indicates at the master unit.
Slave modem 3 stops working due to
lack of power or other reason. Receiver
Rx2 on slave modem 1 and receiver Rx1
on slave modem 2 detects interruptions.
Alarm signal CE1 indicates on slave
modem 1 and CE2 indicates on slave
modem 2. Both CE1 and CE2 indicates
on master modem.
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