SA Buses with Multiple Network Sensors - BCPro - LIT-12011908 - General System Information - BCPro System - 4.0

MS/TP Communications Bus for the BCPro System Technical Bulletin

Product name
BCPro System
Document type
Technical Bulletin
Document number
LIT-12011908
Version
4.0
Revision date
2020-03-16
An SA bus supports up to four network sensors. Figure 1 shows an example of two SA buses, each with four network sensors.
Note: Do not mix RJ-style modular (phone) jack and screw terminal devices on the SA bus. Due to the permanent internal SA bus EOL termination contained in C4-CGMs, C4-CVMs, CH-PCAs, CH-PCGs, CH-PCVs, and CH-PCXs , using both the phone jack and terminal block effectively puts the EOL termination in the middle of the SA trunk, creating a star network configuration. This configuration violates the RS-485 network wiring guidelines and can cause unpredictable communication problems.

Some NS Series Network Sensors and NS Series Discharge Air Sensors models are DIP switch addressable.

Figure 1. SA Bus Example Showing Multiple Networks Sensors