Industrial 8-Channel Digital I/O Module

This is an industrial grade 8DI / 8DO digital isolated input & output module with RS485 control interface. Supports passive / active input, adopts Modbus RTU protocol with built-in protection circuits such as power isolation, optocoupler isolation, resettable fuse, and TVS.

- Configurable device address (1~255), multi devices can be cascaded on RS485 bus

- Onboard voltage regulator, supports 7~36V wide range power supply

- Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal

- Onboard high-speed optocoupler isolation, allows signal isolation, high reliability, strong anti-interference

- 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 & anti-electrostatic

- Supports passive and active digital input, with bi-directional optocoupler isolation, built in debouncing algorithm. Supports DI/DO linkage control or DO toggle control

- The output utilizes Darlington transistors with optocoupler isolation, provides stronger driving capability with up to 500mA sinking current, built in flyback diode protection

- Features flash-on, flash-off function, by passing argument to the command, it is possible to turn on the output for a while and then close it automatically

- Rail-mount case design, support stacking combination, easy to install and safer to use

- Multiple LEDs for indicating the input & output status, MCU status and signal transceiving status

Specifications

Communication interface
RS485

Baud rate
4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000

Default communication format
9600, N, 8, 1

Modbus protocol
Standard Modbus RTU protocol

Power supply
DC 7~36V

Digital input
8DI, 5~36V, passive / active input (NPN or PNP), built-in bi-directional optocoupler isolation

Digital output
8DO, 5~36V, open-drain output, output load: 500mA per channel (MAX)