I/O Systems - Select I/ODIS850

Select I/O is an Ethernet networked, single-channel granular I/O system for the ABB Ability™ System 800xA automation platform. Select I/O helps decouple project tasks, minimizes the impact of late changes, and supports standardization of I/O cabinetry ensuring automation projects are delivered on time and under budget. A Signal Conditioning Module (SCM) performs the necessary signal conditioning and powering of the connected field device for one I/O channel.

The DIS850 is a Digital Input Signal Conditioning Module for use in intrinsically safe applications (Zone 0) supporting 2-wire NAMUR field devices with Sequence of Events (SOE).

Features and benefits

  • Digital input for 2-wire field devices (NAMUR proximity switches and contacts according to EN 60947-5-6)
  • Can be used in hazardous areas providing IS signals up to Zone 0
  • Channel to channel galvanic isolation
  • Configurable software signal filter 0...100 ms
  • Protected against wrong wiring
  • Diagnostics:
    • Loop supervision (open circuit and short circuit)
    • Hardware error supervision
    • Communication supervision
    • Internal power supervision

  • Sequence of Events (SoE)
  • DIS850 supports both Normally Open (NO) and Normally Closed (NC) 24 V loops
  • Single loop granularity - each SCM handles a single channel
  • Supports hot swap
  • Mechanical locking slider which turns off field device power and/or output before removal
  • Field disconnect function which can galvanically separate the field loop wiring from the SCM during commissioning and maintenance
  • All SCMs have electronic current limitation
  • Mechanical keying to prevent insertion of wrong module type after commissioning
  • 24V DC powered through Modulebus
  • Configurable through parameters
  • LED indicators on the SCM indicate the operational state of the module