Digital I/O Module (DI / DO)
- 20 single-ended digital inputs supporting ground/open, power/open and power/ground types
- 28 single-ended isolated digital outputs with drive current of at least 20mA
- Input type and output supply configured per 4-channel group, 12V / 28V selectable
- Programmable auto-forwarding between DIO channels — no host intervention required
- Two-bit IO status read-back distinguishing fault / ground-off / power-off / open circuit
- DIO data stored on the module with automatic capacity management, and forwarded to the zero-slot host
- Isolated output design, built on 100% domestic chips
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Specifications
| Item | Value | Note |
|---|---|---|
| Digital Input (DI) | ||
| Channel Configuration | 20 single-ended | |
| Input Types | Ground/open, power/open, power/ground | Input type configured per 4-channel group first |
| Digital Output (DO) | ||
| Channel Configuration | 28 single-ended (isolated) | |
| Output Types | Ground/open, power/open, power/ground | |
| Output Supply | 12V / 28V configurable | Supply configured per 4-channel group first level steps 5 / 10 / 15 / 28V |
| Drive Current | ≥20mA | |
| Data Handling & Storage | ||
| Parameter Setup | DIO parameters set per group of four channels | |
| Auto-Forwarding | Programmable auto-forwarding between DIO channels | |
| IO Status Code | BA=00 fault, 01 ground-off, 10 power-off, 11 open circuit | |
| On-Board Storage | DIO data stored on the module, capacity managed automatically with the oldest data discarded when full | |
| Host Forwarding | DIO data forwarded to the zero-slot module (host) | |
| Parameter Persistence | Saved automatically, reloaded at power-on | |
| Platform Common Characteristics | ||
| Mounting | Front-inserted card, quickly swappable | |
| Standalone Use | Detachable from the chassis for standalone use over gigabit Ethernet | |
| Backplane Communication | Power, command, synchronization and status signals unified over the backplane | |
| Localization Rate | 100% | |
| Component Temperature Grade | -40℃ ~ 85℃ wide temperature | |
FAQ
- How should the two-bit IO status code be read?
- The module reports each IO channel with two bits (BA): 00 means fault, 01 ground-off, 10 power-off and 11 open circuit. Unlike a plain high/low reading, this code separates a broken wire (open circuit) from a line pulled to ground or to supply, so wiring and unit-under-test faults can be located on the spot during integration testing.