Features:
- ID: 04
- Relays from 25 to 32
- Can be connected up to 32 relay boards to one PC COM Port
(NOTE: if you need to connect more relay boards to one RS485 BUS - all boards must have different ID number)

The complete includes:
- One RS485 to 8 Digitally Outputs controller (12V)
- One 12VDC RELAY board (12V)
- 10PIN flat cable approximate 5cm length

Required power:
12VDC / minimum 400 mA.

Dimensions:
Relay board : 120mm / 80mm / 20mm
RS485 controller : 40 mm / 60 mm

Communication Parameters:
8 Data, 1 Stop, No Parity
Baud rate : 9600

Commands:
Relay 25 commands:
OFF command : FF 19 00 (HEX) or 255 25 0 (DEC)
ON command : FF 19 01 (HEX) or 255 25 1 (DEC)

Relay 26 commands:
OFF command : FF 1A 00 (HEX) or 255 26 0 (DEC)
ON command : FF 1A 01 (HEX) or 255 26 1 (DEC)
...
...
...
Relay 32 commands:
OFF command : FF 20 00 (HEX) or 255 32 0 (DEC)
ON command : FF 20 01 (HEX) or 255 32 1 (DEC)

RS485 BUS exsample: