60
CT-600-2
DI no. CN
Connection
Comment
(where available). Only used on ACP system for booster application
with oil pump. High = oil pump error, Low = no oil pump error.
DI 7
CN4
Remote eco
enable
Signal from plant to give start permission for eco operation of the
compressors. Only used when ACP is connected to an economizer
system that is not controlled by the BITZER ACP LINK. High = eco
operation enabled, Low = eco operation disabled.
DI 8
CN4
PID setpoint 2
enable
Signal from plant to change setpoint of PID regulator in ACP LINK.
Only used when the ACP LINK is configured for operating in mode
“auto”. The PID regulator setpoint can be shifted between two values
(parameters in ACP LINK). High = setpoint 2, Low = setpoint 1.
DI 9
CN12
Not used
DI 10
CN12
Drive/motor
error 1
Signal from electrical panel to inform the ACP LINK about
drive/motor error status for motor on compressor no. 1. Error
feedback from frequency inverter, soft starter or motor must be
connected here (where available). Default: Low = drive/motor error,
High = no drive/motor error. Optionally the inverse signal can be
used, by setting the related parameter in the ACP LINK HMI (see
also configuration parameter “Motor error signal inversion” in section
10.11 and 13.1).
DI 11
CN12
Drive/motor
error 2
Same as DI10 for motor on compressor no. 2.
DI 12
CN12
Drive/motor
error 2
Same as DI10 for motor on compressor no. 3
Digital outputs
Observe different ratings of the various outputs.
DO no. CN
Rating
Connection
Comment
DO 1
CN9
3 A /
250 V
Shutdown
Fail-safe signal from ACP LINK to plant to inform that
ACP is shut down (all compressors stopped due to an
alarm). High = at least one compressor is ready to
operate or running. Low = all compressor shut down.
DO 2
CN9
3 A /
250 V
Common
alarm
Fail-safe signal from ACP LINK to plant to inform that
ACP has at least one active alarm. High = no alarms,
Low = at least one active alarm.
DO 3
CN8
3 A /
250 V
Ready for
operation
Signal from ACP LINK to plant to inform that ACP is
ready. High = at least one compressor is ready for