Bitzer ACP Link - Page 62

62 CT-600-2
Analog inputs
It is possible to configure the different analog inputs (0-10V, 0-5V ratiometric, 0-20mA, 4-20mA, PT1000,
NTC). The table below shows the default configuration for ACP. Further information can be found in the
documentation of the M172 module (supplied with the module and available on www.schneider-electric.com).
Analog inputs must be of equal type in pairs, e.g. AI1 and AI2 both 0-10V or both 4-20mA, etc. See sections
9.6 and 13.5 for more information on configuration of the analog inputs.
AI no. CN Rating Connection Comment
AI 1 CN5 0-10V Motor
current 1
Signal from electrical panel to the ACP LINK for current
of motor no. 1.
AI 2 CN5 0-10V Motor
current 2
Signal from electrical panel to the ACP LINK for current
of motor no. 2.
AI 3 CN5 0-10V Motor
current 3
Signal from electrical panel to the ACP LINK for current
of motor no. 3.
AI 4 CN5 0-10V Remote
setpoint 2
Signal from plant to the ACP LINK for remote control of
the capacity setpoint for compressor no. 2. Only used
with operating mode “Remote individual”.
AI 5 CN5 PT1000 External
suction
temperature
Optional signal from temperature sensor mounted in the
common suction header line. Temperature signal is used
by ACP LINK to calculate and display suction gas
superheat.
AI 6 CN5 PT1000 Common
discharge
temperature
Optional signal from temperature sensor mounted in the
discharge gas line out of the oil separator. The
temperature signal is recorded by the ACP LINK but no
further functionality related to this sensor is implemented
yet.
AI 7 CN5 4-20mA External
suction
pressure
Optional signal from suction pressure sensor mounted in
the common suction header line. The pressure signal is
used by the ACP LINK as the system suction pressure
for regulation and protection. It is recommended to use
this suction pressure signal when the operating mode is
“auto” and the regulator type is “suction pressure”.
AI 8 CN5 4-20mA Common
discharge
pressure
Optional signal from the discharge pressure sensor
mounted in the discharge line out of the oil separator.
The common discharge pressure is required on booster
systems to enable the ACP LINK to see the intermediate
pressure of the two-stage plant. On other systems it is
highly recommended to use this signal for improved
surveillance, since the compressor discharge pressure