The 07 AI 91 uses one module address (group number) in the word input range. Each of the 8 channels use 16 bits. The unit is powered with 24 V DC. The CS31 system bus connection is electrically isolated from the rest of the unit. The module offers a number of diagnosis functions (see chapter "Diagnosis and displays"). The diagnosis functions perform a self-calibration for all channels.

The analog input module 07 AI 91 is used as a remote module at the CS31 system bus. It has 8 analog input channels with the following features:

The channels can be configured in pairs for the connection of the following temperature or voltage sensors: • ± 10 V / ± 5 V / ± 500 mV / ± 50 mV • 4...20 mA (with external 250 Ω resistor ) • Pt100 / Pt1000 with linearization • Thermocouples types J, K and S with linearization • Only electrically isolated sensors may be used. • The range of ± 5 V can also be used for measuring 0..20 mA with an additional external 250 Ω resistor.

• The configuration of the input channels as well as the setting of the module address are performed with the DIL switches.

• » Datasheet Link

ABB 07AI91 AC31 Analog I/O Module GJR5251600R0202 Datasheet