PCS100 AVC-20
User Manual
97
Table 11
-
2: Remote Control and Monitoring via Customer Terminals
Following control connections are available for wired remote control or monitoring of PCS100 AVC-20.
12
13
14
15
16
12
13
14
15
16
12
13
14
15
16
12
13
14
15
16
3 wire
Start/Stop
4 wire
Start/Stop
Stop/
Inhibit
No external
control
Figure 11
-
4: Control wiring options
Note: “No external control” link is fitted in factory by standard.
11.2.2
Relay Outputs
The product status is indicated by the relay outputs mounted on the front of the Auxiliary Master Module and may
be used for external customer monitoring.
Relay
Product status or description
RUN
Active in RUN, AUTO BYPASS, STARTING, STOPPING.
Not active in BYPASS, FAULT
WARNING
Active if user WARNING condition present (temperature or overload warnings) and
during power up.
FAULT
Not active if FAULT or PCS100 AVC-20 is powered down.
Table 11
-
3: PCS100 AVC
-
20 relay outputs
10
Isolated thermal switch/24 V
AC
/24 V
DC
, 1 A/NC
Transformer overtemperature
information.
The transformer is overheating if
this circuit opens. This circuit must
be monitored, and action taken to
reduce the temperature of the
transformer if it is overheated.
Overheating may occur due to
cooling fan failure, cooling path
blockage or current overload.
11
Isolated thermal switch/24 V
AC
/24 V
DC
, 1 A/NC Transformer alarm
–
return
12
Dry contact only: Return Wire
Start Input
–
return
13
Dry contact only: Start on closing edge
Start Input
–
only used if remote
Start is required
14
Dry contact only: Return Wire
Stop/Reset
–
return
15
Dry contact only: Stop on open edge: Inhibit
while open; Reset on open edge
Stop/Reset
–
input
–
link according
to required function
16
Terminal
Stop/Reset loop