Configuring an Analog X67 (4-20ma)

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:raised_back_of_hand:Hi everyone in need of some assistance from the community. :raised_back_of_hand:
My team and I are currently trying to configure an analog input. We are using a X67BC8321-1 connected to an X67AI1323. We use quite a few of the X67BC’s but this is the first time using an analog X67. We do not have any errors so that makes me believe the device is configured properly. The input device is an inclinometer sensor made by Gefran part# GIB-Z-360-A-2A with an output of 4-20ma. When monitoring the input with the X67 settings on 4-20ma the input value is zero. If the X67 settings are 0-20ma we get a constant value of 144 regardless of the inclination angle.

I was wondering if you or someone in the B&R community could help…

    1. Is the X67 bus controller compatible with the analog X67AI?
    1. On the analog inputs we only have +24v, IN+, and 0V. Is the IN- mandatory? Our sensor doesn’t have an IN- output.
    1. Or is there is something else in the configuration we are missing.
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Hi Cristoval, and welcome to the Community!

The X67AI1323 is definitely compatible with the X67 bus controller. It sounds like the module is communicating okay with the controller (to double check, you can make sure that the ModuleOk datapoint is true).

This is the input evaluation circuit (from the Automation Studio Help):

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To me, it looks like the module is comparing the signal from pin 2 (Input+) to pin 4 (Input-). What happens if you connect the 0V wire to the IN- pin (I’m assuming that you have it connected to the Ground pin now)?

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If it’s an active analog input ( 2wires).
I connected the + signal of the sensor to pin 1 (24V)
The - signal of the sensor to AI+. (pin 2)
I placed a bridge between pin 3 and pin 4 (AI- → 0V)

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Screenshot 2025-05-29 173935
Screenshot 2025-05-29 1739351198×1081 93 KB

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Active Analog Input
Pin 1: +24v
Pin 2: +AI
Pin 3: (0v → -AI)
Pin 4: (-AI → 0V)

Hey everyone, thanks for your help! I was finally able to get an accurate 4mA-20mA range value from the Z-Axis inclinometer (based on 360 degrees) for this specific device. The issue I was facing before was due to faulty wiring. The reference potential circuit wasn’t being monitored correctly, which prevented me from getting a proper reading.

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