Product Details
Related Product Model Recommendations
Payment & Delivery
FAQs
Q1: What is the primary function of the DI880?
It is a high-integrity digital input module that acquires 16 channels of 24 V DC switch signals (pushbuttons, limit switches, relay contacts, proximity sensors) and transmits them to the AC 800M controller via the S800 I/O backplane. Its SIL 3 certification and SOE functionality make it suitable for safety-critical applications requiring precise event time-stamping.
Q2: What is the Sequence of Events (SOE) function?
The SOE function collects and time-stamps input state changes with 1 ms resolution, storing up to 512 × 16 events in the event queue. It includes a shutter filter to suppress unwanted events and can report status information including channel value, queue full, synchronization jitter, uncertain time, and channel error.
Q3: Does the DI880 support redundancy?
Yes. The module supports single or redundant configurations. In redundant mode, two DI880 modules operate in parallel, and if one fails, the system continues operating without interruption. Combined with CPU redundancy (PM86x) and CEX-Bus redundancy, it forms a fully redundant architecture.
Q4: Can the DI880 be replaced while the system is running?
Yes. The module supports hot-swap capability, allowing online replacement without shutting down the process. The configuration is stored in the controller and automatically reloaded when the replacement module is inserted.
Q5: What are the typical applications for this module?
It is widely used in oil & gas (ESD, F&G, PSD systems), power generation (turbine protection, interlock systems), chemical/petrochemical (SIL3 safety loops), and any process requiring high-integrity event recording with 1 ms time resolution.
