Issue
Where should the third-party RS-485 LAN connect on the BAS PIU?
Product Line
Satchwell BAS & SigmaEnvironment
- BAS PIU based on UNC532 controller
- RS-485 communication
- Type D hardware
Cause
The original documentation incorrectly specified the RS-485 connection points as B1, B2 on PL10, which led to confusion during installation and troubleshooting.
Resolution
To correctly connect the RS-485 LAN:
- Use C1 (+) and C2 (-) on PL2 for RS-485 communication.
- Additionally, create a link between TXD and RXD on PL4 to ensure proper data transmission.
⚠️ Note: Always verify wiring against the latest hardware documentation before installation.
