AERCO Control System (ACS)
CHAPTER 2
: ACS Installation
11/22/2017
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, New York 10913
Page 31 of 139
OMM-0081_0F
Phone: 800-526-0288
GF-131
RS485 WIRING AT THE ACS
2.9
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 P/N 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