ABB DI880
ABB DI880 - Image 2

ABB DI880

Product Brief:​ The DI880 is a SIL3-certified (IEC 61508), high-integrity digital input module of the S800 I/O series. It provides 16 channels of 24 V DC current-sinking inputs with 1 ms SOE capability, on-board diagnostics, and per-channel sensor power outputs. It is suitable for safety-instrumented functions (SIF) as well as normal process status acquisition in 800xA and Symphony Plus systems, and supports redundant module configuration.

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Category: SKU: ABB DI880

Description

ABB DI880

  • Technical Specifications:
    • Input Voltage: 24 V DC (range 18–30 V DC; “0” = –30…+5 V, “1” = 11–30 V)
    • Channels: 16, one group (galvanically isolated from ModuleBus)
    • Input Impedance: 3.1 kΩ
    • Input Current: ≈7 mA @ 24 V DC per channel
    • Sensor Power: One current-limited 24 V DC sensor supply output per channel (typ. 25 mA limit)
    • SOE: 1 ms resolution, up to 512 × 16 event buffer, shutter filter configurable
    • Isolation: Group isolated from backplane (500 V AC test, 50 V rated)
    • Redundancy: Supports 1oo2 (two-out-of-two) redundant pairing with second DI880
    • Safety Integrity: SIL3 per IEC 61508, Category 4 per EN 954-1/ EN ISO 13849-1
    • Power Dissipation: Typ. 2.4 W (fully loaded)
    • ModuleBus Current: +5 V typ. 125 mA, max 150 mA; +24 V ext. max 527 mA (incl. sensor power)
    • Max Field Cable Length: 600 m
    • Operating Temp.: 0 °C to +55 °C (compact MTU vertical: max +40 °C)
    • Compatible MTUs: TU810V1, TU812V1, TU814V1, TU830V1, TU833, TU842, TU843, TU852
    • Certifications: CE, UL 61010, ATEX / IECEx Zone 2, cULus, SIL3, marine (ABS, BV, DNV, LR)
  • Functional Features:
    • SIL3 certified for use in safety loops (ESD pushbutton, fire/gas detector status, etc.)
    • Built-in self-test and channel diagnostics reported to controller
    • Per-channel sensor excitation simplifies 2-wire proximity switch wiring
    • Supports redundant hot-standby pairing — automatic switchover on failure
    • SOE with time synchronization for root-cause analysis of process trips
  • Application Scenarios:
    • Emergency Shutdown (ESD) pushbutton / pull-cord status monitoring in SIS
    • Fire & Gas (F&G) detector discrete alarm inputs in oil & gas / petrochemical plants
    • Safety gate / interlock position confirmation in high-risk machinery
    • High-integrity turbine protective trip-status inputs
  • Material & Structure / Working Principle / Installation / Precautions:​ Same family as DI830 but note:
    • Redundancy Precaution:​ When used redundantly, both modules must be identically configured and connected to the same field devices via isolation diodes or wiring per ABB redundancy diagram — improper wiring invalidates SIL claim.
    • Sensor Power:​ Each channel’s sensor supply is current-limited — do NOT parallel multiple channels’ sensor supplies to power a single device.
    • Periodic Proof Test:​ SIL loop requires proof-test interval per safety manual— document DI880 function test in SIS proof-test record.

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