How can I configure fencing for redundant power supplies in a RHEL 6 or 7 High Availability cluster with pacemaker?

Solution Unverified - Updated 2018-10-01T13:59:07+00:00 -

Issue

I have redundant power supplies on my cluster nodes, so when a node must be fenced, both ports must be shut off. How do I configure this in pacemaker?
In cman clusters, we used to configure redundant devices in cluster.conf by referencing them in an off/off/on/on pattern. Is there a way to configure this with pcs and stonith?
When I try to configure redundant fence devices, I am not able to reference them in a level and also specify the action and port. Do I need to create a separate device for each action that needs to be performed?
I have two power supplies. How do I configure stonith to handle this correctly?

Red Hat Enterprise Linux (RHEL) 6 or 7 with the High Availability Add On
pacemaker
Redundant fence (stonith) devices that must all be turned off before any are turned back on
- This is typical with multiple power supplies

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