AERCO Control System (ACS)
CHAPTER 2
: ACS Installation
11/22/2017
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, New York 10913
Page 25 of 139
OMM-0081_0F
Phone: 800-526-0288
GF-131
METHOD A
– BIAS & TERMINATION ACTIVATED AT C-MORE PMC BOARD
Figure 2-7: RS485 (Modbus) Wiring For Benchmark Series Boilers (Sheet 1 of 2)
NOTE
Do not terminate the shields of the
RS485 leads to the ground (GND)
terminal. The shields must be
terminated at the source ends
only. Connect the shields of the
incoming and outgoing RS485
leads together.
I/O Board
ACTIVATE BIAS1, BIAS2 &
TERM DIP SWITCHES ON
PCM BOARD OF LAST C-
MORE CONTROL BOX
OPEN DOOR TO
ACCESS I/O BOX
BENCHMARK
DO NOT USE
THESE TERMINALS
RS485 CONNECTIONS
(SEE NOTE)