Technical Specification

Operating Voltage24VDC / 250mA
Number of channels8 Input(SPST NO/NC
Switch&Button Input),
8 Outputs (Relay Output)
Number of Com. Ports1x RS/EIA-485
Communication protocolModbus RTU
I/O Functionality
Input: Trigger
Output: Toggle / Pulse
Isolation typeInputs: Non-isolated
Com Port: Non-isolated
Outputs: Dry contact
Isolation voltageOutput contacts to system ground: 4kV (rms)
Applied Voltage (VDC) to Input Channels24VDC (Input Channel Voltage, generated by the device)
Applied Current (mA) to Input Channels9mA
Applied Voltage to Relay OutputMax 250VAC
Applied Current to Relay Output5A @30VDC / 10A
@250VAC cosφ=1
according VDE standard)
Frequency50/60Hz (for Relay)
Relay TypeDry Contact SPST-NO
Wiring TerminationsInsulated Wire Ferrules
System expansionMax. 3 devices in series Total 24 inputs, 24 outputs

Environmental Specification

Operating Temperature-10 ~ +60 Celsius
Storage Temperature-40 ~ +80 Celsius
Relative humidity

Mechanical Specification


84 mm
126 mm
58 mm
Weight300 g
Maximum wire gauge for terminals28-12AWG / 2.5 mm2
MountingDIN or Panel mount



NIO8 modules mountable on EN50022 standard 7.5 mm x 35 mm DIN rail and panel mounting.

Caution: Both two screws must be firmly tightened to prevent unwanted movement or falling.
Ensure the module is isolated from the surface to avoid electrical leakage or shock.