System 800xA offers flexible and modular I/O solutions through fieldbus technologies and hardwired I/O systems like S800 and S900. The system is now enhanced with Select I/O that allows to condition each signal coming from the field individually. Select I/O is Ethernet connected and consist of single channel granular Signal Conditioning Modules (SCM).

AIS880 a Analog Input Signal Conditioning Module High Integrity for 2/4-wire devices. 16 bit. HART communication. Certified for SIL3.

Features and benefits

  • Analog input for 2-wire or external powered 4-wire field devices
  • Signal range: 4...20 mA
  • Can be used in hazardous areas
  • Certified for Functional safety
  • Transmitter power current limited to 30 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)
    • Hardware error supervision
    • Communication supervision
    • Device malfunction low, underrange, overrange and device malfunction high detection
    • Internal power supervision
  • Support of HART field devices (up to HART application layer revision 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.