Universal I/O port not working: 0N-1557

[BootLoops]

I am having difficulty installing a temp sensor into my SmartUPS-5000. Whenever I plug the sensor in (Universal I/O port 1), it will show connected, and then immediately afterwards it disconnects. I've rebooting the NMC, but it stays down. On the Web-GUI onder the Universal I/O status page, the only thing listed is under "Output Relay". It has "Port 1 Relay" listed in the "Lost comm" state. Not sure if that means anything, but I don't see that on my other UPS

5/10/2024	21:29:38	Device	Environment: Lost the local network management interface-to-integrated Environmental Monitor (Universal I/O at Port 1) communication.	0x0345
5/10/2024	21:29:38	Device	Environment: Restored the local network management interface-to-integrated Environmental Monitor (Universal I/O at Port 1) communication.	0x0344
5/10/2024	21:24:10	Device	Environment: Lost the local network management interface-to-integrated Environmental Monitor (Universal I/O at Port 1) communication.	0x0345
5/10/2024	21:24:10	Device	Environment: Restored the local network management interface-to-integrated Environmental Monitor (Universal I/O at Port 1) communication.	0x0344

This is my device and NMC information:

General

Model Number

0N-1557

 Serial Number

xxxxxxxxxxxxxxx

 Hardware Revision

3

APC OS (AOS)

 Name

aos

 Version

v2.0.0.6

Application Module

 Name

su

 Version

v2.0.0.5

APC Boot Monitor

 Name

boot

 Version

v1.4.0.2

Any help would be greatly appreciated

[Teken]

The NMC in the system is one of those embedded ones vs removable? Can you provide a picture of the back of the NMC and upload the same on the APC Forum.

Ensure the image is viewable on the forum.

Is the temperature sensor a AP9335T or AP9335TH temp / humidity sensor? Do you have another temperature sensor to check if the sensor is bad?

If you have another similar NMC in a UPS. What happens when you connect this specific temperature sensor into the other NMC?

Lastly, can you confirm what the NMC firmware is in both units. 

[BootLoops]

The NMC is the embedded kind (0N-1557 model). I don't have a pic of my device, but this one I got from Schneider looks exactly the same

I'm using the AP9335TH temp sensor. I have another Smart-UPS-5000 in another cabinet, and I've tested the sensor in that one, so I know it works. When it connects, it will show under the "Temperature & Humidity" header on the "Universal I/O" tab. I've also tried a brand new sensor, with the same results

I'm not 100% sure how I can check the firmware on the NMC (unless its in the information I've posted, AOS, Application Module, etc.). There is this, but I think its the UPS firmware not the NMC

Firmware Revision

UPS 10.1 (ID1020)

[Teken]

RE: NMC firmware, just wanted to see if both units were on the same firmware as you posted up above (AOS / App). If you haven’t done so already I would consider three options from least invasive to the most invasive from:

Default the NMC via the internal web browser.

Firmware: Reload the same NMC firmware.

Format: This will erase all settings and reset the NMC to an OEM state.