Features at a glance
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, magnetical isolation, resettable fuse, and TVS.
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Configurable device address (1~255), multi devices can be cascaded on RS485 bus
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Onboard voltage regulator, supports 7~36V wide range power supply
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Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal
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Onboard unibody magnetical isolation, allows signal isolation, high reliability, strong anti-interference
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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
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Supports passive and active digital input, with bi-directional optocoupler isolation, built in debouncing algorithm. Supports DI/DO linkage control or DO toggle control
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The output utilizes Darlington transistors with optocoupler isolation, provides stronger driving capability with up to 500mA sinking current, built in flyback diode protection
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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
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Rail-mount case design, support stacking combination, easy to install and safer to use
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Multiple LEDs for indicating the input & output status, MCU status and signal transceiving status
Specifications
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Communication interface
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RS485
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Baud rate
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4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
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Default communication format
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9600, N, 8, 1
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Modbus protocol
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Standard Modbus RTU protocol
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Power supply
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DC 7~36V
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Digital input
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8DI, 5~36V, passive / active input (NPN or PNP), built-in bi-directional optocoupler isolation
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Digital output
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8DO, 5~36V, open-drain output, output load: 500mA per channel (MAX)
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Primary function
Supports reading digital input by sending Modbus RTU protocol commands via RS485 for digital output control
Industrial Grade Isolated Protection
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 to ensure stable current and voltage output, provides over-current and over-voltage proof, improves shock-proof performance, suitable for industrial environments with high requirement.
Interface introduction
Full Isolation for Digital Input & Output
Supports passive and active digital input (PNP type or NPN type), with bi-directional optocoupler isolation. Adopts Darlington transistor open-drain output, up to 500mA sinking current per channel for directly driving relays
Multiple modes for various automation scenarios
Supports multiple Output control modes, each channel supports independent control mode setting
Wide voltage power supply, isolated RS485 interface
Built-in fuse and anti-reverse protection, With Power and Signal Dual Isolation
Rail-Mount Support
Supports 35mm standard guide rail, with rail-mount buckle, easy to install
Supports stacking installation
