The Modbus RTU Module (A) is an industrial standard mixed input and output module, supports 2-ch relay outputs, 2-ch digital inputs, 2-ch analog current outputs, and 2-ch analog current/voltage inputs. Adopts Modbus RTU protocol with built-in protection circuits such as power isolation, magnetical isolation, resettable fuse, and TVS.

• Supports 7V ~ 36V wide voltage power supply, configurable device address (1 ~ 255), multi devices can be cascaded on RS485 bus
• Supports power isolation and magnetical isolation, enabling power and signal dual isolation for communication, with high reliability and strong anti-interference capability
• Onboard resettable fuse and TVS (Transient Voltage Suppressor), effectively suppresses surge voltage and transient spike voltage in the circuit, provides over-current/over-voltage proof, lightningproof & ESD protection
• Supports passive and active digital input, with bi-directional optocoupler isolation, built-in debouncing algorithm. The relays support digital input linkage control or toggle control
• Supports 12-bit high-precision acquisition with multiple range input modes, supports single-ended/differential input, supports voltage and current simultaneous acquisition
• Adopts high-precision resistors and zero-drift high-precision operational amplifier for more accurate data output or acquisition
• High quality relay, contact rating: ≤10A 250V AC or ≤10A 30V DC
• Rail-mount PC flame-retardant case design, easy to install and safer to use
• 3 × LEDs for indicating the MCU status and signal transceiving status

Supports Sending Modbus RTU Protocol Commands Via RS485
For Digital And Analog Input/Output

Onboard power and signal dual isolation for RS485 communication, provides stable isolation voltage, features high reliability and strong anti-interference performance. Built-in TVS (transient voltage suppression tube) can effectively suppress the surge voltage and transient peak voltage in the circuit, lightningproof & ESD protection. Built-in resettable fuse and protection diode, provides over-current and over-voltage proof, improves shock-proof performance, suitable for industrial environments with high requirement.