NV 1131 - Alternate Power Supply

[drjarmon]

This statement and the supporting diagram seems to be a bit misleading:

Alternate Power Supply The NetVanta 1131 RPS/EPS unit provides redundant power feeds via an alternate AC power circuit. In this instance, the NetVanta switch is connected to the primary AC circuit, and connected to NetVanta 1131 RPS/EPS, which is powered via an alternate AC power source. Should the primary AC circuit fail, the NetVanta 1131 RPS automatically provides power feed to the connected NetVanta switch eliminating any downtime.

We have two NV1638 connected to primary AC source and alternative NV1131 connected to another AC source.  If we lose power on the primary AC, one of the NV1638 grabs the NV1131 and the other NV1638 goes down.

https://portal.adtran.com/pub/Library/Data_Sheets/Default_Public/61700530F1-8%20NV1131%20RPS%20EPS.p...

[jayh]

It depends on how you connect it. There is one RPS with three connectors and one EPS with one connector. The RPS has the capacity of supplying redundant power to one switch in a group. In addition, if a switch is oversubscribed in terms of PoE load, the EPS can provide an additional 370 watts of PoE to devices connected to the switch.

In your scenario, if PoE is not oversubscribed on either switch, connect one 1638 to the EPS output and the other to any of the RPS outputs and see if you get the desired results.

If it is connected to multiple switches, the RPS outputs will protect against a failure of the internal power supply or AC input of any one of the switches, but those are shared outputs of one power supply that doesn't have the capacity to supply power to multiple switches.