I/O Systems - Select I/ODOS885

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 DOS885 is a Digital Output (24V / 3A) Signal Conditioning Module for use in High Integrity applications (certified for SIL3) supporting 2-wire devices such as solenoids, horns, and beacons.

Features and benefits

  • Digital output for 2-wire field devices
  • 24 V/3 A current sourcing
  • Can be used in hazardous areas
  • Certified for Functional safety
  • Field power sourced from the power injection
  • Short circuit proof, electronically current limited to 3 A
  • Built-in inductive load suppression, free-wheeling diode
  • Galvanic isolation
  • Protected against wrong wiring
  • Diagnostics:
    • Loop supervision (open circuit and short circuit)
    • Hardware error supervision
    • Communication supervision
    • Internal power supervision
    • Power injection supervision
  • 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
  • Certified for SIL3