While we generally suggest a ‘security first’ approach to all network communications, there are times when it does not make sense.
When you are on an internal only trusted network and your devices and data are very resource bound would be one.
We have found that the PAC S and PAC R controllers slow down as they compute the SSL hash on each request and so in cases like this, using straight http is often the way forward.
Go into PAC Manager and set the http port number and set https to no.
Configure a user/pass in the PAC S RESTful server.
Set Node-RED to use http and the user/pass and you will be up and running with no hit in performance in just about 1 minute.