41, 42, 51, 52 Vacuum/Pressure Switch Pin-outs

9-pin Type "D"
Pin Description
1 Power Return (-)
2 Power Input (+)
3 Relay Normally Open Contact
4 Relay Common
5 Relay Normally Closed Contact
6 Reserved
7 Reserved
8 Reserved
9 Chassis Ground.
Flying Leads
Wire Description
Red Power Input (+)
Black Power Return (-)
Green Relay Normally Open Contact
White Relay Common
Orange Relay Normally Closed Contact
Bare Shield (Drain)

Need help?

Contact an Application Specialist by sending an email to MKS Instruments or call 978-645-5500.