Technical Specifications Channel Quantity:32 digital input channels Input Signal:24VDC sink/source input Backplane Power Consumption:310mA @5VDC Isolation Voltage:1500V RMS channel‑to‑backplane Operating Temperature:0℃～+60℃ Storage Temperature:-40℃～+85℃ Relative Humidity:5%‑95%, non‑condensing Certifications:CE, UL, cUL
Functional Features 32‑channel isolated digital input, sink/source signal compatibility, channel‑group fault diagnosis, front‑panel per‑channel LED status indication, filter circuit for input signal jitter suppression.
Application Scenarios Series 90‑70 automation system field switch signal acquisition, proximity switch input, button and sensor discrete signal collection.
Performance Parameters Hardware input signal filtering Group‑level input fault detection Shock & vibration:Comply with IEC 60068
Structural Characteristics Standard Series 90‑70 plug‑in rack module Front‑panel per‑channel LED status indicators Field signal wiring terminal block Backplane gold‑finger bus contact Internal opto‑coupler isolation and signal conditioning circuit Mechanical locking latch
Working Principle Field 24VDC discrete switch signal accesses module input terminals. Opto‑coupler isolation circuit separates field circuit and PLC internal backplane circuit. After signal filtering processing, on‑off status of each channel is transmitted to Series 90‑70 CPU through backplane bus. Front‑panel LED reflects real‑time on‑off state for each input channel.
Installation Requirements Insert module into free slot of Series 90‑70 chassis. Complete cabinet protective grounding. Use field‑approved control cables for discrete signal wiring. Separate input signal cables from high‑voltage power cables. Power‑off rack before module replacement. Guarantee cabinet heat‑dissipation ventilation.
Usage Notes Match field 24VDC signal polarity with module sink/source setting. Check channel LED status for signal troubleshooting. Forbid on‑site disassembly. Prevent corrosive gas and liquid splash.
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