GE IC693MDL940D – 12-Point Relay Output Module | Series 90-30 PLC Platform
Engineering Background
The IC693MDL940D is a discrete relay output module designed for GE Fanuc’s Series 90-30 programmable logic controller platform — one of the most widely deployed mid-range PLC architectures in North American industrial automation. Relay output modules remain the preferred interface technology where galvanic isolation, mixed-voltage load switching, and field-side protection are non-negotiable requirements.
Product Positioning
This module addresses the needs of process engineers and maintenance teams who require a proven, drop-in relay output solution for Series 90-30 baseboards. It is suitable for both new panel builds and direct replacement of aging MDL940 variants in legacy installations. Konmask.com supplies this module from verified inventory channels with full traceability documentation available on request.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | IC693MDL940D |
| Manufacturer | GE Fanuc / GE Automation & Controls |
| Platform | Series 90-30 (90-30 / VersaMax compatible baseboard) |
| Module Type | Discrete Relay Output |
| Output Points | 12 relay output points |
| Output Voltage Range | 24 VDC / 120 VAC / 240 VAC |
| Output Current (Resistive) | 2 A per point |
| Output Current (Inductive) | 1 A per point (L/R ≤ 7 ms) |
| Common Configuration | 4 isolated commons (3 points + 3 points + 3 points + 3 points) |
| Isolation | Optical isolation between logic and field side |
| Contact Type | Form A (SPST-NO) relay contacts |
| Mechanical Life | ≥ 10,000,000 operations |
| Electrical Life | ≥ 100,000 operations at rated load |
| Backplane Current Draw | 350 mA @ 5 VDC |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Storage Temperature | -40°C to 85°C |
| Relative Humidity | 5% to 95% non-condensing |
| Module Weight | Approx. 300 g |
| Certifications | UL Listed, CE Marked, cUL |
| Firmware Revision | D (latest production revision) |
Proven Application Environments
- Discrete Manufacturing: Motor starter control, solenoid valve actuation, and conveyor interlocking in automotive and assembly lines.
- Water & Wastewater: Pump station control, valve sequencing, and alarm annunciation panels requiring mixed AC/DC field wiring.
- Oil & Gas Upstream: Wellhead control panels and compressor station auxiliary I/O where relay isolation is mandated by site safety standards.
- Building Automation: HVAC damper control, chiller sequencing, and lighting relay panels integrated with Series 90-30 supervisory systems.
- Food & Beverage: Washdown-adjacent control panels where relay contacts provide inherent protection against inductive load transients.
- Legacy System Maintenance: Direct plug-in replacement for IC693MDL940, IC693MDL940A/B/C revisions without CPU firmware changes.
Engineering Advantages
- Mixed-Voltage Field Wiring: Four isolated commons allow simultaneous 24 VDC, 120 VAC, and 240 VAC loads on a single module — eliminating the need for separate output modules per voltage class.
- True Galvanic Isolation: Optical isolation plus relay contact separation provides >1500 V RMS field-to-logic isolation, protecting the CPU backplane from field-side transients and ground faults.
- Revision D Reliability: The D-suffix revision incorporates GE’s final production improvements to relay coil drive circuitry, reducing nuisance trip rates reported in earlier revisions.
- Zero Configuration: Module is auto-recognized by the Series 90-30 CPU upon insertion; no DIP switch or jumper configuration required.
- Hot-Swap Compatible: Supports live insertion/removal on powered baseboards when system configuration permits, minimizing planned downtime windows.
- Broad Baseboard Compatibility: Compatible with IC693CHS391, IC693CHS392, IC693CHS393, IC693CHS398, and IC694CHS392 baseboards.
System Architecture & Signal Flow
The IC693MDL940D occupies a single I/O slot on any Series 90-30 baseboard. The CPU communicates with the module via the Series 90-30 backplane bus. Each output point is driven by an optocoupler that energizes a dedicated relay coil. The relay contact (Form A, normally open) then switches the field-side load circuit. Four isolated common terminals allow independent field power sources per group of three outputs, enabling mixed-voltage wiring within a single module footprint.
Signal flow: CPU Register Bit → Backplane Bus → Module Logic → Optocoupler → Relay Coil → Relay Contact → Field Load
Sourcing & Quality Verification
- Inventory Origin: Sourced from authorized distributors, decommissioned OEM panels, and certified surplus channels — never from unverified grey-market brokers.
- Incoming Inspection: Each unit undergoes visual inspection (label integrity, connector condition, housing cracks), functional power-on test, and revision verification prior to listing.
- Counterfeit Mitigation: Label fonts, PCB markings, and relay brand are cross-referenced against GE Fanuc factory documentation. Suspect units are quarantined and not listed.
- Packaging: Shipped in anti-static bags with foam cushioning inside double-wall corrugated cartons. ESD precautions maintained throughout handling.
- Documentation Available: GE Fanuc IC693MDL940D datasheet, Series 90-30 I/O Module Specifications manual (GFK-0898), and test report available on request.
Procurement Process
- Confirm Part Number: Verify IC693MDL940D matches your baseboard slot requirements and CPU firmware version (CPU firmware ≥ v6.00 recommended for full feature support).
- Check Stock & Lead Time: Contact support@konmask.com for real-time inventory confirmation and lead time if quantity > 5 units.
- Place Order: Add to cart and complete checkout, or request a formal quotation for PO-based procurement.
- Shipping: Standard orders ship within 1–2 business days. Express and freight options available. International shipping to most regions supported.
- Receiving Inspection: Inspect packaging integrity upon receipt. Report any damage within 48 hours with photographic evidence for warranty processing.
Technical FAQ
Q: Is the IC693MDL940D compatible with the Series 90-30 CPU IC693CPU374?
A: Yes. The MDL940D is compatible with all Series 90-30 CPUs including IC693CPU374, CPU375, CPU364, and CPU360. No firmware changes are required.
Q: Can I mix 120 VAC and 24 VDC loads on the same module?
A: Yes. The four isolated commons allow different field voltages per group. Wire 120 VAC to one common group and 24 VDC to another — they remain electrically isolated from each other.
Q: What is the maximum inrush current the relay contacts can handle?
A: GE specifies a maximum inrush of 10 A for ≤ 20 ms for resistive loads. For motor or transformer loads, consult GFK-0898 Table 3-4 for derating guidelines.
Q: Is this module suitable for SIL-rated safety applications?
A: The IC693MDL940D is not SIL-certified. For safety-rated applications, GE’s PACSystems RX3i safety I/O modules (IC695 series) should be specified.
Q: What is the difference between IC693MDL940 and IC693MDL940D?
A: The D suffix denotes the fourth hardware revision. Revision D incorporates improved relay coil drive circuitry and updated conformal coating. It is a direct functional replacement for all earlier revisions.
Q: Do you provide a warranty?
A: Yes. Konmask.com provides a 90-day functional warranty on all modules. Extended warranty options are available — contact support for details.
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