GE Fanuc IC697MDL750H Series 90-70 24/48VDC Output Card

Description

Product Introduction & Engineering Value

When managing large banks of DC solenoids or starter coils, finding discrete output modules that handle heavy inductive inrush currents without tripping thermal limits is a frequent pain point. The GE Fanuc IC697MDL750H Discrete Output Module solves this by delivering 32 positive logic (sourcing) 24/48V DC outputs with a massive 10-Amp surge capacity per point (20x rated current) for fast transient switching.

Occupying a single slot space, the module arranges its outputs into four optically isolated groups of eight. The “H” revision includes updated board-level thermal design enhancements over older A–E revisions, making it far more resilient in high-density rack deployments. As with all Series 90-70 digital cards, software configuration via VersaPro or Proficy Machine Edition sets hold-last-state or turn-off default behaviors under fault conditions—completely eliminating physical DIP switches.

Technical Specifications

• Module Type: High-Density Discrete Output Card (Positive Logic / Sourcing)
• Number of Outputs: 32 Points (4 isolated groups of 8 points with independent commons)
• Nominal Operating Voltage: 24 VDC / 48 VDC (Operating Range: 20 to 60 VDC)
• Continuous Output Current: 0.5 Amps maximum per point
• Peak Inrush Current: 10 Amps maximum for 20 milliseconds (20x nominal rating)
• Backplane Current Consumption: 0.25 Amps @ +5V DC
• On-State Voltage Drop: 1.0 Volt maximum at full load
• Off-State Leakage Current: 1.0 mA maximum
• Output Response Time: On delay: < 1 ms; Off delay: < 1 ms
• Isolation: 1500 VAC logic-to-board (backplane); 500 VAC group-to-group
• Status Indicators: 32 individual point status LEDs + 1 MODULE OK status LED

Field Application & The “Trench” Experience

During an unplanned shutdown on a high-speed beverage bottling line, a legacy 16-point DC output card burnt out its driver chips after an un-suppressed pneumatic valve coil shorted during a cleaning cycle. The line needed an immediate replacement card that could drive heavy 24V DC solenoid banks while leaving room for future manifold expansion.

The site engineer swapped in an IC697MDL750H. By utilizing two of the four available groups, they brought the existing 16 solenoids back online and left Groups C & D ready for an upcoming palletizer expansion. The card’s 10A inrush capability handled the high inductive surge of the large directional control valves without blowing fuses or chattering channels, restoring production in under 30 minutes.

Target Application Scenarios:

• Automated Material Handling: Actuating 24V DC divert arms and heavy-duty conveyor stopping solenoids.
• High-Speed Hydraulic Press Control: Driving hydraulic directional control valves requiring quick 1ms switching times.
• Pilot Lamp & Annunciator Panels: Powering large 48V DC indicator light matrix boards across multi-zone control rooms.

IC697MDL750H

Transparency SOP: QA & Testing

Every IC697MDL750H module entering our stock passes through a strict four-stage hardware stress routine:

1. Connector & PCB Optical Check: VME backplane pins, trace pathways, and the high-density front terminal connector are inspected under magnification for micro-fractures, oxidation, or thermal stressing.
2. Backplane Current Draw Test: Plugs into a powered Series 90-70 rack to verify that logic current stays locked at the 0.25A nominal limit on the +5V rail.
3. 32-Point Inrush Load Verification: Every individual channel is connected to an inductive load bank and cycled continuously at 24V DC and 48V DC to confirm point switching, LED activity, and inrush tolerance.
4. Group Isolation Test: High-voltage dielectric testing (500 VAC) is applied between output groups to guarantee true electrical isolation between field commons.

The Veteran’s Tech Trap Guide

⚠️ NO INTERNAL FUSING: The IC697MDL750H contains no onboard fuses. If a field line shorts out to ground, the output driver will attempt to feed the short until the power supply limits out. Always install fast-acting external line fuses (e.g., Bussmann AGC-3/4 or Littlefuse 312.750) on individual points or group commons to protect field wiring.

⚠️ GROUP CURRENT DISSIPATION: While each point can carry 0.5A continuously, driving all 8 points in a single group at full 0.5A simultaneously generates significant internal heat. Ensure cabinet ambient temperatures stay below 50°C, or install a rack fan assembly (IC697ACC721) if running high continuous loads across all 32 channels.

PRO TIP: When replacing an older revision card (e.g., MDL750A through MDL750E), the MDL750H is a 100% backward-compatible drop-in replacement. You do not need to re-configure the hardware CPU configuration file inside VersaPro or Proficy Machine Edition—the software recognizes Rev H seamlessly.

Dynamic FAQ

Q: Is the IC697MDL750H a sinking or sourcing output module?

A: The is a positive logic (sourcing) module. It switches the positive side of the 20 to 60 VDC supply directly to the load.

Q: What is the benefit of the “H” revision over older MDL750 modules?

A: Revision H includes updated component layouts and improved board-level heat dissipation compared to legacy Rev A–E cards, enhancing long-term component reliability under continuous load.

Q: Can I mix 24V DC and 48V DC field voltages on the same card?

A: Yes! Because the module features four completely isolated output groups, you can supply 24 VDC to Group A/B commons and 48 VDC to Group C/D commons simultaneously.

Q: What condition is your stock in, and what warranty is provided?

A: We supply fully tested New Surplus and factory-refurbished cards. Every unit is backed by our comprehensive 2-year replacement warranty.

Q: What happens to the outputs if the PLC CPU loses power or enters Stop mode?

A: The behavior is user-configurable in software. You can program the channels to either Turn OFF (default safety state) or Hold Last State depending on your plant process requirements.