I/O Systems - Select I/ODOS820

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 DOS820 is a Digital Output Relay NO Signal Conditioning Module supporting 2-wire devices.

Features and benefits

  • Digital output for 2-wire field devices
  • 5-250 V AC, 5-125 V DC, up to 3 A
  • Can be used in hazardous areas
  • Field power sourced from the power injection
  • Channel to channel galvanic isolation
  • Diagnostics:
    • Fuse status supervision
    • Communication supervision
    • Internal power supervision
  • OSP (Output Set to Predetermined value)
  • 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.
  • 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