I/O Systems - SD Series I/ORAO02

The RAO02 Redundant 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 RAO02 module has one D/A converter for each output channel.

In current mode, the RAO02 module supports HART v5.4 instruments and provides short circuit protection by limiting current to a maximum of 26 mA. The RAO02 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 24 HART v5.4 secondary variables Total
  • Max 4 sec vars per analog input CH
  • Sec HART variables available to control logic
  • 12 to 16-Bit (with polarity) A/D resolutionV
  • A/D update of all 16 Channels in 100 msecs
  • Accuracy is ±0.1 % of Full Scale Range where FSR = 25 mA or 6.25 VDC