SA bus terminals - EasyIO - LIT-12013983 - Building Management - FW-VAV

FW-VAV Quick Start Guide

Brand
EasyIO
Product name
FW-VAV
Document type
Quick Start Guide
Document number
LIT-12013983
Document revision
0
Revision date
2023-08-16
Language
English

Wire the SA bus terminals in a daisy-chain configuration. Use a stranded four-wire twisted and shielded cable as shown in the following figure. The four-wire cable consists of two twisted pairs. The first twisted pair is the positive and negative wires and the second twisted pair is COM and SA PWR wires.

You can use the SA Bus positive and negative wires as a normal RS-485 port.

Figure 1. SA terminal wiring
Callout Description
1 Terminal on the first device
2 Terminal on the daisy-chained device
3 Connection to another device on the SA bus
4 Cable shield connection. You do not need to ground the cable shield.
5 Connection from another device on the SA bus