Technical Guide
Full Digital Module
5
Installation and Wiring
Important Wiring Considerations
Please carefully read and apply the following information when wiring
the Full Digital Module:
1. The 1 to 5 VDC signals for the Copeland Compressor
Speed need to use 18-gauge shielded twisted pair cable, and
the Drain wire must be the GND signal.
2. All 24 VAC wiring must be connected so that all ground
wires remain common. Failure to follow this procedure can
result in damage to the module and connected devices.
3. All wiring is to be in accordance with local and
national electrical codes and speci
fi
cations.
4. Be sure that all wiring connections are properly inserted
and tightened into the terminal blocks. Do not allow wire
strands to stick out and touch adjoining terminals. This
could potentially cause a short circuit.
5. Be sure all modular wiring harness connectors are seated
fi
rmly in their respective modular connectors on the circuit
board.
NOTE:
The Compressor Relays on the Full Digital Module
are used rather than the relay outputs on the VCM-X
Modular series controller.
WARNING:
Be sure all controllers and modules are
powered down before connecting or
disconnecting HSSC cables.
Figure 3: Full Digital E-BUS Connection Wiring
SHLD
SHLD
SHLD
OUT
OUT
OUT
COM
COM
COM
EXC
EXC
EXC
P4
P4
P4
BK
BK
BK
RD
RD
RD
WH
WH
WH
P2
P2
P2
P1
P1
P1
P3
P3
P3
P5
P5
P5
C1
C1
C1
C2
C2
C2
P6
P6
P6
SHLD
OUT
COM
EXC
P4
BK
RD
WH
P2
P1
P3
P5
AO1
SIG 1
SIG 2
SIG 3
SIG 4
AO2
GND
GND
GND
GND
C1
C2
P6
+5V
SIG 2
GND
OPTI
O
N
S
ALARM
ANALOG
STAT
+5V
COMM
GND
SIG 4
GND
BIN 2
R1
R2
GND
RELAYS
ADDRESS
SIG 3
+5V
GND
BIN 1
COM
+5V
SIG 1
R3
R4
Rc
AO1
AO2
PWM1-
PWM1+
PWM2-
PWM2+
OE275-01 Suction
Pressure Transducer
OE275-01 Suction
Pressure Transducer
OE275-01 Suction
Pressure Transducer
OE275-01 Suction
Pressure Transducer
OE370-23-FD-A
Full Digital Module
Copeland Digital
Compressor Controller B1
Copeland Digital
Compressor Controller A2
Copeland Digital
Compressor Controller A1
Copeland Digital
Compressor Controller B2
If Using One
Module, Set
Addresses To
Off. If Using
Two Modules,
Set Addresses
Consecutively.
This Dip
Switch Is Not
Used For This
Application
PWR
Connect To E-BUS
Distribution Module or
VCM-X Modular E-BUS Controller
Connect To Other
WattMaster-Approved
E-BUS Expansion Module(s)
HSSC Cable
24 VAC Transformer
3 VA Minimum
Line Voltage
24 V
A
C
GND
WARNING!!
Observe Polarity! All
boards must be wired
with GND-to-GND and
24 VAC-to-24 VAC.
Failure to observe
polarity could result in
damage to the boards.
HSSC Cable
NOTE:
NORMALLY OPEN AND
RATED FOR 24 VAC POWER
ALL RELAY OUTPUTS
ARE
COMPRESSOR A2 ENABLE
COMPRESSOR A1 ENABLE
R1
R4
R3
R2
COMPRESSOR B1 ENABLE
COMPRESSOR B2 ENABLE
ONLY.
1 AMP MAXIMUM LOAD.
HVAC UNIT CONNECTIONS
