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M-AI-VT-001-EN Rev.C.1
M-AI-VT-001-EN Rev.C.1
Comm
Reset
Fault
Reset
Fault
Status
EV
TX
STATUS
RUN
TX
RX
RX
RS485-1
I-Lock
STAGING VFD COOLING
CAN
Status
24VDC
AUX P/T SENSORS
COMPRESSOR INTERFACE MODULE
POWER
CCM CAN
USB
I-Lock
Status
RS485-2
J7
1
1
1
1
1
1
1
J6
J5
J4
J3
J2
J1
Overview of the VTT Compressor
Compressor Interface
Module (CIM) Board
The CIM provides compressor communication
interfaces, control of EEVs and optional chiller
sensor monitoring capabilities. The CIM supports
Universal Serial Bus (USB) and RS-485 ModBus
communication options. Communication
between the CIM and CCM is provided through
an internal CAN bus communication interface.
The CIM board provides circuitry with the
following functionalities:
• External communication interface, 485, USB
• Internal communication interface, CAN bus
with CCM board
• Motor/Drive cooling solenoid valve
• Compressor status/run status monitoring
• Staging valve output
• Safety Interlock
• Sensor monitoring
• Drive module cooling control: EEV_P
Figure 13
CIM
Revision C
Comm
Reset
Fault
Reset
Fault
Status
EV
TX
STATUS
RUN
TX
RX
RX
RS485-1
I-Lock
STAGING VFD COOLING
CAN
Status
24VDC
AUX P/T SENSORS
COMPRESSOR INTERFACE MODULE
POWER
CCM CAN
USB
I-Lock
Status
RS485-2
Revisions A and B