Discrete Input Expansion Block Twenty-Channel BR20

The BR20 output expansion block is designed for switching signal circuits on/off, signal switching, switching on/off high-current circuits, managing notification systems, activating emergency signaling systems, etc.

Recommended for use together with regulators, time relays (RD8, RP8, RV8) and other leading devices; supports the standard ModBus communication protocol over RS-485 network.

Main functions and operating modes of the output expansion block:

• Expansion blocks are independent devices with an RS-485 communication interface using ModBus RTU protocol, allowing them to be used together with devices produced by our enterprise, equipment from other manufacturers, as well as directly controlled by a personal computer;
• The number of inputs/outputs can be increased by using several expansion blocks connected to a single control device. This approach ensures extended functional capabilities of measuring/regulating devices, high reliability, and interchangeability;
• The device is a slave device, meaning normal operation is possible only when connected to a master device (personal computer or microprocessor control system). The communication protocol between the device and master device is Modbus RTU protocol over RS-485 network;

The user can programmatically reconfigure BR20 via the master device, namely:

• device address (number) in the network;
• data exchange rate (baud rate);
• number of data bits;
• type of parity;
• number of stop bits;
• initial state of discrete outputs;
• states of analog outputs;
• light indication of operating modes;
• simple mounting on a DIN rail.