A-1012 RS485 & USB Modbus Multifunction IO Unit is a powerful and versatile remote I/O solution designed for modern industrial automation systems. It combines multiple input and output types in a single compact DIN-rail mountable device, reducing wiring complexity while improving system efficiency.
With support for both Modbus RTU and Modbus ASCII protocols, the A-1012 ensures seamless integration with PLCs, SCADA systems, and industrial controllers. The built-in USB interface allows direct configuration and communication via a virtual COM port, eliminating the need for external power during setup.
Engineered with optical isolation (5000V DC), surge protection, and industrial-grade components, the unit provides reliable performance even in harsh electrical environments. It is ideal for applications requiring precise measurement, control, and remote monitoring.
Key Features
- RS485 and USB dual communication interface
- Supports Modbus RTU & Modbus ASCII protocols
- 2 × Digital Inputs with optical isolation
- 2 × Digital Outputs (Transistor, 1A @ 10–35VDC)
- 4 × Analog Inputs (0–20mA / 4–20mA)
- 2 × PT100 / PT1000 temperature inputs
- 2 × Analog Outputs (0–20mA / 4–20mA, 12-bit)
- 16-bit ADC high-resolution measurement
Technical Specifications
- Model: A-1012
- Inputs: 2DI, 4AI (2× current + 2× PT100/PT1000)
- Outputs: 2DO, 2AO
- Analog Input Range: 0–20mA / 4–20mA
- Temperature Range: -200°C to +600°C (PT100/PT1000)
- ADC Resolution: 16-bit
- Analog Output Resolution: 12-bit
- Sampling Rate: 10 samples/second (total)
- Input Impedance: 100Ω (current), 10MΩ (RTD)
- Accuracy: ±0.1%
- Communication: RS485, USB (virtual COM port)
- Protocols: Modbus RTU / Modbus ASCII
- Baud Rate: 1200–115200 bps
- Isolation Voltage: 5000 V DC
- Power Supply: 10–30VDC / 24VAC (RS485 mode), USB powered option
- Operating Temperature: -20°C to +75°C
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