AERCO XPC GATEWAY Communications - Manual (Page 45)

GF-122 AERCO XPC GATEWAY
45
NOTES:
1. IF BAS CONTAINS A 4-WIRE RS485 PORT,
TIE THE TWO POSITIVE (+) AND NEGATIVE (-)
LEADS TOGETHER AS SHOWN IN DETAIL “A”
2. IF BAS CONTAINS ONLY A RS232 PORT, A
RS232-TO-RS485 CONVERTER WILL BE
REQUIRED.
3. THE LAST C-MORE BOILER ON THE RS485 LOOP
MUST HAVE ITS TERMINATION RESISTOR (TERM)
TURNED ON. ALSO, BIAS (BIAS1, BIAS2) MAY BE
REQUIRED. CHECK WITH THE BAS MANUFACTURER.
+
-
RS485
COMM
(P/O I/O BOX)
C-MORE
NETWORK BOILER 1
-
+ RS485
COMM
P/O I/O BOX
C-MORE
NETWORK BOILER 2
TO OTHER NETWORK
BOILERS
(SEE NOTE 3)
XPC GATEWAY
PORT
1a
NET +
NET -
SHLD
NET +
N/C
N/C
GND
EIA-232
EIA-485
2W
4W
TO BAS
(SEE NOTES)
PORT
2
NET -
RS485
T+
R-
R+
T-
SHIELD
4-WI
RE R
S4
8
5 PO
RT
DETAIL “A”
C-MOREs CONNECTED TO XPC PORT 2
Figure 2-9. C-More Controller Sample Network Diagrams (Sheet 1 of 2)