Installation and setup instructions for MODBUS GasPoint Expansion Module GP-MBUS4. It covers installation, wiring, MODBUS protocol, and implemented functions/register definitions.
The BW GasPoint MODBUS Expansion Module, model GP-MBUS4, is an optional add-on card for the 12-bit version of the BW GasPoint. It enables the device to interface with a MODBUS system using a suitable controller (master device). The module is fully compatible with BW GasPoint Monitors having serial numbers starting with '3-' and up.
| Communications Protocol | MODBUS RTU slave |
|---|---|
| Baud rates | 1200, 2400, 9600, 19200 bps |
| Word length | 8 |
| Electrical interface | RS 485 |
| Duplex mode | Half Duplex |
| MODBUS addressable range | 1-247 |
| Max devices on network | 32 |
| Supported MODBUS function codes | 3, 5, 6, and 7 |
| Power Supply | Powered by BW GasPoint |
| Power Consumption | <70 mA @ 24 VDC |
The default baud rate is set to 9600.
The default slave address is set to 01.
The default parity configuration is even parity with one stop bit.
No, the module is powered directly by the BW GasPoint.