Overview
The Xycom XVME-260 digital relay output module is a proven workhorse for industrial automation and process control systems built on VMEbus architecture. This 6U, double-width module delivers 32 independent relay output channels with integrated varistor protection and up to 300 VDC channel-to-bus isolation. Designed for systems requiring reliable, galvanically isolated relay switching with minimal electromagnetic interference, the XVME-260 is widely used in legacy and modern retrofit PLC applications across manufacturing, energy, and utilities.
Key Features
- 32 Relay Output Channels – Provides simultaneous control of multiple devices with independent contact isolation.
- Varistor-Protected Outputs – Built-in surge protection extends equipment lifespan and prevents voltage spike damage.
- 300 VDC Channel-to-Bus Isolation – Robust galvanic isolation protects VMEbus from high-voltage transients and electrical noise.
- Software-Readable Outputs – Real-time status monitoring and diagnostics without external sensing hardware.
- Normally Open (NO) Initialization – All relays reset to safe, predictable NO state upon module power-up or system reset.
- Compact Double-Width Form Factor – Optimized for standard VMEbus backplanes with minimal slot requirements.
Technical Specifications
Output Characteristics:
- DC Load Switching: 30 VDC at 1.0 A (20 W maximum per channel)
- AC Load Switching: 48 VAC at 0.3 A (33 VA maximum per channel)
- Contact Type: Magnetic relay with varistor overvoltage protection
- Isolation Voltage: 300 VDC (channel-to-channel and channel-to-bus)
- Output Status: Software-readable via VMEbus interface
- Power-Up State: All relays Normally Open (NO)
Physical Specifications:
- Form Factor: 6U VMEbus double-width module
- Dimensions: 163 × 38 × 58 mm (L × H × W)
- Weight: 4 kg
- Part Number Variant: SM500-UL94V-0
Typical Applications
The XVME-260 excels in industrial environments where isolated relay control is essential:
- Manufacturing Automation – Machine tool control, solenoid actuation, alarm outputs, and motor starter interlocking.
- Process Control Systems – Pump/valve control, furnace switching, and facility-wide electrical isolation.
- Power Generation & Utilities – Switchgear integration, generator load control, and high-voltage circuit protection signaling.
- Legacy PLC Retrofits – Drop-in replacement for aging VMEbus systems without redesign of control cabinets.
- Safety-Critical Systems – Redundant output control and fail-safe logic implementation.
Compatibility & Replacements
Compatible With
- VMEbus backplane systems (6U and 9U crates)
- Acromag/Xembedded VMEbus systems
- Legacy industrial PLC architectures using VME form factor
- Standard VME interface cards and CPU modules
- Industrial relay control logic and DCS environments
Replaces / Drop-In Replacement For
The Xycom XVME-260 (SM500-UL94V-0) directly replaces other XVME-260 units. For compatibility with alternative relay output modules from other manufacturers, verify contact ratings and isolation specifications with your system integrator before ordering.
Works With
- VMEbus CPU modules (68000-based and compatible processors)
- Acromag/Xembedded firmware and drivers
- Standard industrial relay logic and PLC programming environments
- Legacy control systems and SCADA software using VMEbus interfaces
- Industrial automation software supporting VME module drivers
