[Dsg-ltcc] LTCC Solenoid Control

[Marc McMullen]

Thanks Denny, 

We will look into those. 

Marc McMullen 
Physics Division 
Detector Support Group 
7738 


From: "Denny Insley" <dinsley at jlab.org> 
To: "Marc McMullen" <mcmullen at jlab.org> 
Sent: Thursday, November 8, 2018 7:07:04 AM 
Subject: Re: [Dsg-ltcc] LTCC Solenoid Control 

Good morning Marc, 

Quick question, are the 120VAC coils you're referring to redhat solenoid valves? 
I ask because if that is the case we have a substantial stock pile of those valves 
in 98. 

Denny 



----- Original Message ----- 
From: "Marc McMullen" <mcmullen at jlab.org> 
To: "dsg-ltcc" <dsg-ltcc at jlab.org> 
Cc: "Todd Kujawa" <kujawa at jlab.org>, "Robert Miller" <rmiller at jlab.org> 
Sent: Wednesday, November 7, 2018 5:41:20 PM 
Subject: [Dsg-ltcc] LTCC Solenoid Control 

Hi Bob, 

We discussed the solenoid controls in our status meeting today and 
decided that the best option would be to use the existing solenoids, but 
change the coils to the low current 120VAC coils. We have also consulted 
with Todd Kujawa to ensure cabling will be up to code. 

The change will require a new chassis to distribute 120VAC supplied by 
the UPS. We are procuring the components for this new chassis. Once the 
chassis is complete and the 120V coils arrive, they can be installed 
during an opening. 

In the interim, we are modifying a relay chassis from the CLAS6 Hardware 
Monitoring System. This chassis can be used to actuate the currently 
installed 24VAC solenoid coils during standard operating pressures from 
the controls software, just in case the C4F10 arrives before the new 
equipment is installed. 

I have attached a flow diagram, which I have extracted the controls 
portion of your fault scheme. The logic for the control of the solenoids 
and pumps will be programmed using this flow chart. Please review and 
respond with any corrections needed. 

Regards, 

-- 
Marc McMullen 
Detector Support Group 
757-269-7738 


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