The SZUTEK UT-5510A I/O Module manual provides specifications, wiring, and Modbus‑RTU command details for configuring and operating the device.
The UT‑5510A is an 8‑bit I/O controller with four isolated digital inputs and four relay outputs. It communicates via RS‑485 using the Modbus‑RTU protocol, allowing remote control from a PC or PLC. The manual describes the module’s hardware layout, electrical parameters, and supported baud rates.
Key sections cover the module’s physical connectors, data format, command frames for reading inputs, setting outputs, changing device address, and restoring factory defaults. Example command tables and response formats are provided for each function.
| Power supply voltage | +9 ~ +30V DC |
|---|---|
| Working current | 300mA @ 9V max |
| Optical isolation voltage input | 0 ~ 24V |
| Isolation voltage | 2500V DC |
| Maximum contact capacity | 62.5 VA, 60 W |
| Working temperature range | -40°C ~ +85°C |
| Storage temperature range | -40°C ~ +85°C |
| Relative humidity | 5% ~ 95% RH |
| Communication interface | RS485 |
| Supported baud rates | 1200/2400/4800/9600/19200/38400/57600/115200 bps |
| Address range | 1 ~ 247 |
| Data format | 8,N,1 |
| Number of I/O channels | 4 digital inputs, 4 relay outputs |
It uses the Modbus‑RTU protocol over an RS‑485 serial bus.
Connect the RESET pin to GND and power the device back on to restore factory defaults.
The default address is 0x01 and the default baud rate is 9600 bps.
It provides four isolated digital input channels and four relay output channels.