BEMAC UST-202-D 1307D PLC Circuit Board
The BEMAC UST-202-D is a printed circuit board designed for PLC and industrial control applications. It carries the revision identifier 1307D V08B2 and is built on UL 94V‑0 rated FR-4 material. The board serves as a controller or interface card in BEMAC automation systems, typically used for relay logic, signal conditioning, or I/O expansion.
Board Architecture
The board measures approximately 160 mm x 100 mm and features a 16-bit microcontroller (NXP LPC1768, 32-bit ARM Cortex-M3 at 100 MHz) as the main processor. It includes 512 KB flash memory, 64 KB RAM, and an EEPROM (2 KB) for parameter storage. The board has 16 digital inputs (24V DC, optically isolated), 8 relay outputs (2A at 250V AC), and 2 analog input channels (0–10V, 12-bit).
Communication Interfaces
1 x RS-232 (DB9) for programming and serial communication.
1 x RS-485 (terminal block) for Modbus RTU (master/slave).
1 x CAN bus (DB9) for device networking (CANopen).
1 x USB device (mini-B) for firmware updates.
Power and Isolation
The board requires a 24V DC supply (18–30V) with a 1A fuse. Power consumption: 3 W typical. Isolated outputs: 1500 Vrms between field I/O and logic. The onboard power supply generates 3.3V and 5V for internal logic.
Diagnostics and LEDs
Status LEDs: PWR (green), RUN (green), ERR (red), and 8 yellow LEDs for output status. A 4‑bit DIP switch sets the Modbus address (1–15) and baud rate. The board has a built-in watchdog timer that resets the CPU if the program hangs.
Environmental and Physical
Operating temperature: 0 to 60°C; storage: -20 to 85°C. Humidity: 10% to 90% non-condensing. Dimensions: 160 x 100 mm with four mounting holes (3.5 mm). Weight: 150 g. The board is conformally coated for dust resistance. Protection class: IP00 (bare board).
Compatibility and Applications
The UST-202-D is a replacement part for BEMAC control panels. It can be used for pump control, conveyor logic, and small process automation. The Modbus RTU allows connection to SCADA systems.
Ordering and Documentation
Part number: BEMAC UST-202-D (1307D V08B2). The board is supplied with a 34-pin I/O connector and a 9-pin serial cable. Manual: BEMAC UST Series Hardware Guide (BMC-202-EN).
