panel (Figure 2-10) behind the removable front
door.
To access the I/O Box terminal strips shown in
Figure 2-10, loosen the four cover screws and
remove the cover. All field wiring is installed
from the rear of the panel by routing the wires
through one of the four bushings provided.
Refer to the wiring diagram provided on the
cover of the I/O Box (Figure 2-11) when making
all wiring connections.
Brief descriptions of each mode of operation,
and their wiring requirements, are provided in
the following paragraphs. Additional information
concerning field wiring is provided in paragraphs
2.9.1 through 2.9.9. Refer to Chapter 5 for
detailed information on the available modes of
operation
TERMINAL
STRIPS
LOWER RIGHT CORNER
OF FRONT PANEL
Figure 2-10. Input/Output (I/O)
Box Location
OUTDOOR SENSOR
IN
SENSOR
COMMON
(AIR) AUX SENSOR
IN
REMOTE INTL'K
IN
EXHAUST SWITCH
IN
DELAYED INTL'K
IN
NOT USED
NOT
USED
+
ANALOG
IN
-
+
B.M.S. (PWM)
IN
-
NC
COM
NO
NC
COM
NO
FAULT
RELAY
120 VAC, 5A,
RES
AUX
RELAY
120 VAC, 5A,
RES
SHIELD
NOT
USED
+
mA OUT
-
RS-485
+
COMM.
G
-
NOT
USED
0 –
10V
AGND
RELAY
CONTACTS:
120 VAC, 30
VDC
5 AMPS
RESISTIVE
DANGER
120 VAC USED
IN THIS BOX
Figure 2-11. I/O Box Terminal Strip
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