SNMP OID for Redundant Switch PS

Hi All -

We are trying to monitor the redundant power supply status on one of our client's switches (mostly PC6248s and N3048s).

I've looked through a lot of Dell's documentation, focusing on the 6248 and the Dell OpenManage Administrator documentation.  I can't find anything specific to the 6248 that spoke to SNMP OIDs for Redundant Power Supply status, though I did find OIDs in the OpenManage Administrator guide for it.

However when I tried to do an SNMP walk on the switch for that OID I either got nothing or...

WARNING: SNMP Walk issue: Exception calling "Walk" with "7" argument(s): "Exception of type 'Lextm.SharpSnmpLib.Messagi
ng.TimeoutException' was thrown."

So I am looking to see if anyone has had experience with this and could help me out.
When I reached out to our technical rep they were given a CLI command to send me for this but the network monitoring tool we use needs an OID to monitor SNMP.

Thanks!