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 DIS821 is a Digital Input 230 V Signal Conditioning Module supporting 2/3/4-wire devices with Sequence of Events (SOE).
Features and benefits
- Digital input for 2-wire, 3-wire, and externally powered 4-wire field devices
- Channel to channel galvanic isolation
- Field power sourced from the power injection
- Configurable software signal filter 0...100 ms
- Diagnostics:
- Fuse status supervision
- Communication supervision
- Internal power supervision
- Sequence of Events (SoE)
- DIS821 supports both Normally Open (NO) and Normally Closed (NC)
- 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
- 24 V DC powered through Modulebus
- Configurable through parameters
- LED indicators on the SCM indicate the operational state of the module