8
RSM-DEV1 Technical Guide
INSTALLATION
Wiring
Figure 2: RSM-DEV1 Inputs Wiring
COM
+
ALARM
UP
DOWN
ENTER
MENU
BK
RD
WH
BK
RD
WH
AAON P/N: ASM07687
+24 V
AC
GND
RELA
Y CONT
ACT
RA
TING IS 1
AMP
MAX @ 24 V
AC
CONDENSER
COMP 1 ENABLE
COMP 2 / HI SPEED
ANALOG OUTPUTS
COMMON
RELAY OUTPUTS
LABEL P/N:
G149410
NOT USED
COND FAN
GND
24 VAC POWER ONLY
WARNING! POLARITY
MUST BE OBSERVED
OR THE CONTROLLER
WILL BE DAMAGED
REVERSING VALVE
+5 V
DISCHARGE TEMP 1
COMP STAT 1
SP
DISCHARGE TEMP 2
COMP STAT 2
GND
EMER SHDN
GND
NOT USED
GND
BINARY INPUTS
MODBUS
RSM-DEV1
www.aaon.com
SUCTION PRES
DUAL
E-BUS
EXP VALVE 1
+5 V
HP
GND
TXV COIL TEMP
NOT USED
GND
NOT USED
EXP VALVE 2
R+
T-
SH
SHD
T-
R+
SHD
T-
R+
EXP VALVE 3
NOT
INSTALLED
EXP VALVE 4
NOT
INSTALLED
EACH EXP VALVE IS INDIVIDUALLY
ELECTRICALLY ISOLATED
DEFROST SW
HEAD PRES
Suction Pressure
Transducer
Head Pressure
Transducer
Discharge Line Temp 1
Discharge Line Temp 2
TXV Coil Temp
Comp 1 Stat
Comp 2 Stat
Coil Temp Switch
Emer Shutdown
(Optional)
Condenser Fan
GND
18-30 VAC
Line Voltage
Size transformer for
correcto total load:18VA
Inputs Wiring
The RSM-DEV1 uses an E-BUS cable to connect to the VCCX2
Controller. Up to four RSM-DEV1 Modules can be connected. Two
E-BUS expansion ports allow connection to the VCCX2 Controller,
communicating sensors, and other E-BUS modules.
The RSM-DEV1 uses five analog inputs, four binary inputs, four
relays, and one analog output. See
Figure 3, this page,
for inputs
wiring and
Figure 4, page 10,
for outputs wiring.
Head Pressure Control
The RSM-DEV1 can monitor the Head Pressure Transducers and
control condenser fans to maintain a Head Pressure Setpoint. The
condenser fans will be controlled with a 0-10 VDC output signal.
WARNING!
Observe polarity! All boards must be wired with
GND-to-GND and 24 VAC-to-24 VAC. Failure
to observe polarity will result in damage to one
or more of the boards. Expansion modules must
be wired so the expansion modules and the
controller are always powered together. Loss of
power to the expansion module will cause the
controller to become inoperative until power is
restored to the expansion module.
