Technical Specifications Input:8‑channel 24VDC positive logic Output:8‑channel Form A relay dry contact Output Contact Rating:2A @120VAC / 2A @24VDC Isolation Voltage:1500V RMS Backplane Power Consumption:135mA @5VDC Operating Temperature:0℃～+60℃ Storage Temperature:-40℃～+85℃ Relative Humidity:5%-95%, non‑condensing Certifications:CE, UL, cUL
Functional Features Mixed I/O integration, opto‑coupler input isolation, relay dry‑contact output, per‑channel LED indication, status data exchange via backplane bus.
Application Scenarios Compact cabinet small‑equipment control, local machine control unit, skid‑mount device, space‑limited automation retrofits.
Performance Parameters Input response:hardware filter configurable Relay actuation time ≤10ms Individual channel fault does not affect other channels Shock & vibration:Comply with IEC 60068
Structural Characteristics Standard Series 90‑30 plug‑in module Front‑panel LED indicators for input and output channels Front‑side combined field wiring terminal block Backplane gold‑finger bus contact Internal opto‑coupler input circuit and relay output unit Mechanical locking latch
Working Principle Field 24VDC input signals pass opto‑coupler isolation and transmit input status to CPU over backplane bus. CPU output commands trigger internal relay coils, dry‑contacts switch external loads. Physical isolation separates field circuit and PLC logic circuit. LED lamps display real‑time I/O status.
Installation Requirements Insert module into Series 90‑30 rack slot. Complete protective ground connection. Differentiate input signal terminals and relay output NO/NC terminals. Separate field power wiring from low‑signal cables. Power‑off rack before replacing module, hot‑swap not supported. Operate within rated temperature and humidity range.
Usage Notes Input terminals shall not receive voltage over 30VDC. Output contact cannot exceed rated current‑voltage. Install arc‑suppression components for inductive output loads. Regularly check LED and terminal fastening condition. Do not disassemble module on site. Avoid corrosive gas, liquid splash and oil mist.
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