AERCO Control System (ACS) - Manual (Page 31)

MC2: 04/23/13 Page 31 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
2.9 RS485 WIRING AT THE ACS
The ACS communicates with an external Energy Management System (EMS) or Building
Automation System (BAS) utilizing the wiring terminals labeled RXD (Receive Data), TXD
(Transmit Data) and 232 ISO GND (Isolated Ground). If the EMS does not contain an RS232
port, a RS485-to-RS232 Converter (AERCO Part No. 124943) is required to communicate with
the ACS. If a Converter is required, it can be installed inside the wiring compartment of the ACS,
or installed externally. The ACS provides an isolated 12 VDC output terminal (ISO 12V) which
can be used to power AERCO’s RS485-to-RS232 Converter if needed. Refer to Figure 2-12 for
sample network layouts.
Figure 2-12: Sample Network Connections To EMS