ABB 07AI91 GJR5251600R0202 Analog I/O Module 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.

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.

Displays and operating elements on the front panel

8 green LEDs for channel selection and diagnosis, 8 green LEDs for analog value display of one channel

List of diagnosis information relating to the LEDs, when used for diagnosis display

Red LED for error messages

Test button

Configuration of input channels and setting of the module address at the CS31 bus

The measuring ranges for the analog channels are set in pairs (i.e. always for two channels together) using DIL switches 1 and 2. The setting of address DIL switch determines the module address, the analog value representation and the line frequency suppression (50 Hz, 60 Hz or none).

The switches are located under the slide cover on the right side of the module housing. The following figure shows the possible settings.