Elan HC12 User Manual

ELAN HC6/HC12 INSTALLATION MANUAL
© ELAN 2010 | All rights reserved.
Page 22
RS-485 Connections
The RS-485 ports allow connection to Full Duplex (Aprilaire
®
thermostats, for example) and
Half Duplex (Pentair Water Pool and Spa
®
controllers, for example) RS-485 controlled
devices without using adapters. Figure 3-2 shows an example of full duplex connections
using the 568B color code. Refer to the Integration Notes for the device you are integrating
for wiring and programming specifics.
Many companies label the RS-485 connections as “A+, A-, B+,” and “B-.” however other
naming conventions are also used. The table below shows equivalent terms that may be
encountered. Use the appropriate connections for the device to be integrated.
Figure 3-2: RS-485 Connections
RS-485 Port Pin # 568A Color Code 568B Color Code Naming Conventions:
1 White/Green White/Orange RxD + RD (B) B+
2 Green Orange RxD - RD (A) B-
3 White/Orange White/Green TxD + TD (B) A+
4 Blue Blue N/C
5 White/Blue White/Blue N/C
6 Orange Green TxD - TD (A) A-
7 White/Brown White/Brown GND GND GND
8 Brown Brown N/C

Elan HC12 Specifications

General

Brand	Elan
Model	HC12
Category	Controller
Language	English