Acromag / Xembedded / Xycom XVME-212/1 Digital Input Module

The Acromag/Xembedded/Xycom XVME-212/1 is a VMEbus-compliant digital input module delivering 32 optically isolated channels for industrial signal acquisition. Built on a double-height (233.7 mm × 160.0 mm) card, it eliminates host processor polling through programmable scanner circuitry that detects and reports state changes via VMEbus interrupt generation. Each channel features 300 VDC optical isolation and eight jumper-selectable debounce intervals to accommodate noisy field environments.

Technical Specifications

• Channels: 32 digital inputs


• Isolation: 300 VDC channel-to-channel and channel-to-VMEbus GND


• Input Voltage Range: Logic 1: 10–50 VDC | Logic 0: 0–1 VDC


• Reverse Bias Protection: 50 VDC


• On-board Power Supply: Isolated 12 VDC (factory-connected for 12 V relay and switch monitoring; other 10–50 VDC inputs available with board modification)


• Maximum Input Frequency: 3400 Hz


• Minimum Detectable Pulse Width: Positive: 5–25 µsec typical / 100 µsec maximum | Negative: 150 µsec typical / 600 µsec maximum


• Propagation Delay: Off-to-on: 5–25 µsec typical / 100 µsec maximum | On-to-off: 150 µsec typical / 600 µsec maximum


• Operating Temperature: 0° to 65° C


• Humidity: 20–80% RH, non-condensing


• Shock: 50g peak acceleration, 11 msec duration


• Vibration: 2.5g maximum acceleration, 0.030" peak-to-peak displacement


• Altitude: Sea level to 10,000 ft.

Key Features

• Programmable scanner circuitry for change-of-state detection


• VMEbus interrupt capability (IEEE 1014 Rev. C.1 compliant)


• Input debounce filtering with eight selectable intervals


• A24/A16:D16/D08(EO) DTB slave operation

Typical Applications Pushbuttons, relay contacts, limit switches, proximity switches, photo-detector switches, pressure switches, alarm trip inputs.

Compatibility & Integration Fully compatible with VMEbus systems supporting A24/A16 addressing and D16/D08 data transfers.