Gf-131 aerco control system (acs) – AERCO Control System (ACS) User Manual
Page 28
MC2: 04/23/13 Page 28 of 144
GF-131
AERCO Control System (ACS)
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
Installation, Operation, and Maintenance Manual
OMM-0081_0D
METHOD B – TERMINATION ACTIVATED AT I/O BOX
Figure 2-8: RS485 (Modbus) Wiring For KC1000 Boilers (Sheet 2 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.
Connect 120 OHM,
½ Watt resister
between + and –
RS485 terminals on
the LAST C-More
Box.
I/O Board
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