ABB DSSB140
ABB DSSB140 - Image 2

ABB DSSB140

Product Brief:​ The DSSB140 is a high-density digital input module for ABB Advant S100/ MasterPiece 200 controller systems. It reads binary contact closures or voltage-level signals from field devices (limit switches, pushbuttons, breaker aux contacts, relay NO/NC) and presents them to the controller’s I/O image. Versions exist for 24 V DC (most common), 48 V DC, 110 V DC, and 230 V AC (sensing voltage).

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Category: SKU: ABB DSSB140

Description

ABB DSSB140

  • Technical Specifications (typical 24 V DC version):
    • Input Channels: 32 (in groups of 8 or 16, isolated group-wise)
    • Input Voltage (DC version): 24 V DC (18–30 V); threshold ON ≥11 V, OFF ≤5 V
    • Input Current: ≈7 mA @ 24 V DC per channel
    • Input Type: Voltage-sensing or dry-contact (external wetting voltage required for dry contact — module supplies 24 V via sense resistor in voltage mode)
    • Isolation: Group-to-backplane 500 V DC; group-to-group within module typically NOT isolated (common 0 V per group)
    • Response Time: <10 ms (typical); filter configurable 0–63 ms in some FW revisions
    • Power: From S100 rack backplane (5 V logic + 24 V sense if used)
    • Indicators: Module Run / Error LED; some versions have group status LEDs
    • Operating Temp.: 0 °C to +60 °C
    • Mounting: S100 I/O rack slot or DIN-rail mounted S100 adapter
    • Certifications: CE, UL, cUL
  • Functional Features / Application / Structure / Working Principle / Installation / Precautions:
    • Wire N/C or N/O contacts between input terminal and common (0 V or +24 V depending on sourcing/sinking config)
    • For dry contacts use voltage-input mode with internal wetting; for PNP sensors use sinking input mode
    • 32-channel density minimizes rack space in large machine or substation monitoring
    • Verify voltage version (24 V DC vs 110 V DC vs 230 V AC) matches field device — applying 110 V DC to 24 V DC version destroys module
    • Keep separate from high-current AC power wiring; use shielded cable for long runs

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