GE Fanuc IC697MDL350 – Series 90-70 Discrete AC Input Module for Reliable Plant I/O

The GE Fanuc IC697MDL350 is a discrete AC input module for the Series 90-70 platform, built for plants that still rely on rock-solid, rack-based PLC systems. From my experience, this module is typically used to bring in machine permissives, interlocks, and panel switches from 120 VAC circuits, giving the CPU clean, isolated status points without extra interface hardware. You might notice that it fits a standard 90-70 rack slot and uses the usual front terminal interface, so changeovers are straightforward during a shutdown.

Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery: 1 week if in stock; no more than 1 month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• Series 90-70 rack compatibility – Installs directly into the IC697 rack; no special adapters.
• AC discrete sensing – Designed for 50/60 Hz AC inputs, typically used on 120 VAC control circuits found in MCCs and legacy panels.
• Multi-point input density – Commonly deployed in 16-channel configurations for machine and process status signals.
• Per-channel status LEDs – Quick diagnostics: you can see which inputs are made without going online with the PLC.
• Input isolation – Helps protect the backplane and CPU from field disturbances; useful in older facilities where noise is a given.
• Signal filtering – Debounces mechanical contacts and reduces nuisance transitions in many cases.
• Service-friendly wiring – Front-access terminals make maintenance faster during planned outages.

Technical Specifications

Related or Supporting Products

• IC697CHS750 / IC697CHS790 – 90-70 racks (5/9 slot). Choose based on slot count and cabinet space.
• IC697PWR711 – Series 90-70 power supply. Typically paired with mixed I/O loads and a single CPU.
• IC697CPU772 – High-performance CPU option for complex logic and larger I/O.
• IC697CMM742 – Communications module for networking (Ethernet). Useful when migrating HMIs or historians.
• IC697MDL340 – Similar AC input module with higher-density I/O in many cases; used when panel space is tight.
• IC697MDL330 – Discrete output (for reference when pairing inputs/outputs on the same machine section).

Installation & Maintenance

• Cabinet & environment – Install in a ventilated enclosure meeting IEC/UL control panel practices. Keep ambient within 0–60 °C and avoid condensing humidity.
• Wiring – Use properly rated conductors for 120 VAC control circuits. Separate AC input wiring from low-voltage comms to reduce noise. Torque terminals per standard panel practice.
• Grounding & shielding – Bond panel ground; for noisy areas, route AC input commons and shields cleanly to minimize induced transients.
• Handling – Power down the rack before inserting or removing the module. Verify field voltage is de-energized before servicing.
• Routine checks – Inspect terminals quarterly for looseness, dust, or discoloration. From my experience, cleaning with dry air and verifying LED response during a maintenance window catches most issues early.
• Firmware/CPU logic – While the I/O module itself is hardware-based, keeping the CPU firmware and project documentation current helps with diagnostics and replacement tracking.

Quality & Certifications

GE Fanuc Series 90-70 hardware was produced to industrial control standards and, in most cases, carries certifications such as CE and UL/cUL for control equipment. Availability and exact marks can vary by manufacturing lot and year.

• Typical approvals: CE, UL/cUL (industrial control)
• Warranty provided here: 365 days replacement/repair coverage

One thing I appreciate is how predictable this module behaves with plant AC inputs—less fiddling in the field. A maintenance lead recently told us they swapped an older card with the IC697MDL350 during a 3-hour outage; the LED diagnostics and standard terminal layout saved them a second visit. That’s usually what you want with legacy 90-70 gear: stability first, then convenience.