Posts: 16
Threads: 6
Joined: Jun 2020
Reputation:
0
Hello.
I have CAN-UIO16 device. There are sensors that have open collector output. In other words sensor output can be float or grounded. CAN-UIO16 device input detects float or CANx device power supply (+24 V).
A question does it is possible to detect open collector based signals on CANx inputs.
Posts: 7758
Threads: 42
Joined: Jun 2015
Reputation:
447
You need an external pull-up resistor (around 10kohms) between +24V and the input. Most open drain outputs are rated up to 30V but check the device that you want to connect.
Posts: 7758
Threads: 42
Joined: Jun 2015
Reputation:
447
Yes, signal will be inverted but you can invert it again on UIO if needed. Relay will also work but it's an additional device that takes space and requires more wiring. The advantage is that it isolates UIO from an external device if different power supplies are used.
Posts: 265
Threads: 37
Joined: Apr 2019
Reputation:
4
Hello, I have installed multiple UIO16 computers to detect the status of various relays and detect faults.
I have a problem when there is a voltage drop, and when it restarts it does not detect the active signals and forces me to make a change.
In the configuration parameters all the reading and writing flags are active. Anything else I have to do?
Posts: 7758
Threads: 42
Joined: Jun 2015
Reputation:
447
Which input mode are you using? Try Sensor mode.
Posts: 4643
Threads: 24
Joined: Aug 2017
Reputation:
207
------------------------------
Ctrl+F5
Posts: 7758
Threads: 42
Joined: Jun 2015
Reputation:
447
Yes, you can connect it directly. Final conversion has to be done via a script.
