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 AIS890 is an Analog Input Signal Conditioning Module (16-bit) for use in High Integrity (certified for SIL3) and intrinsically safe applications (Zone 0) supporting 2-wire devices and HART communications.
Features and benefits
- Analog input for 2-wire field devices
- Signal range: 4...20 mA
- Can be used in hazardous areas providing IS signals up to Zone 0
- Certified for Functional safety
- Transmitter power current limited to 25 mA
- 16 bit A/D converter resolution
- Channel to channel galvanic isolation
- Hardware filter, rise time 1ms
- Software filter configurable through parameters
- Protected against wrong wiring
- Diagnostics:
- Loop supervision (open circuit and short circuit)
- Internal hardware supervision
- Communication supervision
- Device malfunction low, under range, over range and device malfunction high detection
- Internal power supervision
- Support of HART field devices (up to HART application layer rev. 7):
- HART Pass-Through
- Cyclic read of up to two HART Device Variables
- HART Device Validation
- 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