[Dsg-hallc_controls] UPS status

[Tyler Lemon]

Hi Steven, 

Since the status monitoring is not working with just the UPS's internal components, the manual recommends using an external relay and power supply like you mentioned. 

Attached is what the UPS's manual recommends on how to set up the external relays. 

I've also attached the full manual for reference. The diagram for the relays is on page 94. 

Best regards, 
Tyler 


From: "Steve Lassiter" <lassiter at jlab.org> 
To: "dsg-hallc controls" <dsg-hallc_controls at jlab.org> 
Sent: Tuesday, September 11, 2018 4:48:48 PM 
Subject: [Dsg-hallc_controls] UPS status 

Hi, 

The status for the HMS_UPS does not appear to be working. A 24V dc source is from the rotation rack is being feed into pin 12 on the UPS and returned by pin 13 to the I/O module rotation:3 ch11.data. The ground of the 24VPSU is fed into the group3 common block of the I/O module. 

If the ferrups UPS uses a transistor with reference to its internal 12V psu, then an isolation relay will be need at the UPS connection, as the two dc psu will have different grounds. 

Steven 

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