I/O Systems - SD Series I/OAO02

The AO02 Analog Output module processes up to 16 high level, group isolated, analog output field signals. Each channel is independently configurable for either 4 to 20 mA or 1 to +5 VDC ranges. FC 221 (I/O Device Definition) sets AO module operating parameters and each output channel is configured using FC 223 (Analog Output CH) to set indivdual output channel parameters such as engineering units, High/Low Alarm limits, default value in event of loss of communication with controller, etc.

D/A resolution of each channel is 12 bits. The AO02 module has one D/A converter for each output channel.

In current mode, the AO02 module supports HART v5.4 instruments and provides short circuit protection by limiting current to a maximum of 26 mA. The AO02 module will also detect an open circuit in less than 5 seconds.

Features and benefits

  • 16 independently configurable channels supporting:
  • 4 to 20 mADC, or 1 to +5 VDC
  • Up to 20 HART v5.4 secondary variables Total, max 4 sec vars per analog output CH
  • Secondary HART variable update 2.5 typical, 8 max seconds
  • 12-Bit D/A converter resolution
  • Current mode load up to 750
  • Accuracy is ±0.1 % of Full Scale Range where FSR = 25 mA or 6.25 VDC