Specifications

MODBUS COMMUNICATION MANUAL
4-6
mA OUT
RS-485
COMM.
+
-
+
-
ANALOG IN
SENSOR COMMON
OUTDOOR SENSOR IN
REMOTE INTL'K IN
B.M.S. (PWM) IN
SHIELD
+
-
+
-
AUX SENSOR IN
NOT USED
EXHAUST SWITCH IN
DELAYED INTL'K IN
FAULT RELAY
120 VAC, 5A, RES
AUX RELAY
120 VAC, 5A, RES
G
NOT USED
NOT USED
NC
COM
NO
NC
COM
NO
NOT USED
RS485 Modbus
Connections
(See NOTE)
BENCHMARK
KC1000
NOTE
DO NOT TERMINATE THE SHIELDS OF THE
RS485 LEADS TO THE GROUND (G) TERMINAL.
THE SHIELDS MUST BE TERMINATED AT THE
SOURCE ENDS ONLY. CONNECT THE SHIELDS
OF THE INCOMING AND OUTGOING RS485 LEADS
TOGETHER.
Figure 4-5. I/O Box RS485 COMM Terminal Connections