Xycom XVME-2122 – VMEbus Digital I/O Module for Discrete Control and Machine Monitoring

The Xycom XVME-2122 is a VMEbus I/O board designed for reliable, rack-mounted discrete signal interfacing. In most cases, you’ll see it used to bring field signals from limit switches, relays, and interlocks into a VME system, or to drive machine signals back out to contactors and lamps. From my experience, the XVME-2122 fits well in brownfield upgrades where you want to keep the VME backplane and modernize the I/O, and it’s also a steady choice for test cells and production lines that need stable, event-driven digital I/O with long service life.

One thing I appreciate is the straightforward integration: standard 6U Eurocard mechanics, VME backplane power, and front-panel connectors that typically make wiring and troubleshooting practical on the plant floor. You might notice that the XVME-2122 family tends to focus on isolation between field and logic—handy if your cabinets mix noisy loads and sensitive control electronics.

Order Placement Process and Guarantees

• Warranty: 365 days
• Lead time: 1 week if in stock; no more than one month at the latest
• Payment terms: 50% advance payment; full payment prior to delivery
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Key Features

• 6U VMEbus form factor – Fits standard VME chassis with P1/P2 backplane connectors for quick slot-in installation.
• Industrial-grade digital I/O – Built for discrete sensing and actuation; typically used with switches, relays, contactors, and indicators.
• Field-to-logic isolation – Helps protect the controller from noise and transients in mixed-voltage cabinets.
• Event-driven control – Many deployments leverage change-of-state/interrupt-driven logic to reduce CPU polling overhead.
• Service-friendly indicators – Front-panel status LEDs (on most revisions) simplify commissioning and fault tracing.
• Proven in legacy and mixed systems – Common in long-life VME systems where dependable I/O matters more than flashy features.

Technical Specifications

Where it’s typically used

• Machine guarding and interlock monitoring in mixed-voltage panels
• Line start/stop logic, lamp/siren control, and operator panel signals
• Fixture and test stand discrete I/O where deterministic response is preferred

A maintenance supervisor told us they keep a few XVME-2122 boards on hand because the modules “just keep running” and swapping one in a live production rack is straightforward. That seems to be the theme with legacy Xycom gear—predictable behavior and easy diagnostics.

Related or Supporting Products

• Xycom XVME-2120 / XVME-2121 – Related digital I/O variants in the same family, often differing by channel count or voltage/isolation details.
• Xycom XVME-240 series – Analog input/output boards if you also need measurement or control beyond discrete signals.
• VME 6U chassis and power supplies – Standard VME backplanes and card cages with adequate airflow and 5 VDC capacity.
• Field wiring breakouts – 50-pin ribbon or D-sub to screw-terminal adapter panels to simplify cabinet wiring and labeling.

Installation & Maintenance

• Cabinet and chassis: Use a VME 6U chassis with proper card guides, ground bonding, and forced-air cooling. Keep intake filters clean.
• Power and grounding: Provide stable 5 VDC on the backplane; separate logic ground from field ground as recommended; avoid shared returns with noisy loads.
• Wiring: Route field I/O in shielded cables where possible; segregate high-voltage or high-current conductors from logic cabling; label channels clearly.
• Safety: De-energize the cabinet before inserting/removing boards; follow ESD precautions; confirm isolation ratings against your field voltages.
• Routine checks: Inspect connectors and terminal blocks quarterly; verify I/O channel operation during planned downtime; tighten any removable terminal screws.
• Firmware/Configuration: Most XVME digital I/O runs at register-level without frequent firmware changes; keep your VME CPU/OS drivers aligned with the board revision.

Quality & Certifications

• CE compliance on many revisions; UL component recognition often applies at the chassis/system level.
• RoHS status can vary by production date; for strict RoHS projects, please confirm the exact board revision.
• Manufacturer quality systems commonly aligned with ISO 9001 practices for legacy Xycom production.
• Standard warranty: 365 days.