The DI880 is a 16-channel 24 V d.c. digital input module for single or redundant configuration. The input voltage range is 18 to 30 V d.c., and the input current is 7 mA at 24 V d.c. Each input channel consists of current-limiting components, EMC protection components, an input state indication LED, and an optical isolation barrier. There is one current-limited transducer power output per input. The Sequence of Event function (SOE) can collect events with a resolution of 1 ms. The event queue can contain up to 512 x 16 events. The function includes a Shutter filter for suppression of unwanted events. The SOE function can report the following status in the event message – Channel value, Queue full, Synchronization jitter, Uncertain time, Shutter filter active, and Channel error.
Features and benefits
- 16 channels for 24 V d.c. inputs with current sinking
- Redundant or single configuration
- 1 group of 16 isolated from ground
- Input status indicators
- Supports S880 I/O High Integrity (PM857, PM858, PM862, PM863, PM867, PM866A and PM891)
- Advanced on-board diagnostics
- Sequence of events (SOE)
- Current limited sensor supply per channel
- Certified for SIL3 according to IEC 61508
- Certified for Category 4 according to EN 954-1