Control, I/O and power cards from alarm, engine-control and automation systems often look identical across versions. Check these before you order a replacement:
- Full part number and revision. Printed on the label or etched on the board.
- Firmware or software version. Some cards need the same or a compatible version.
- Jumper and DIP-switch settings. Photograph them on the old card before removal.
- Connector and slot. Confirm the backplane or rack position.
Every card we sell is power-tested before dispatch, and we send photos of the label and settings so you can compare before you pay.