American Magnetics 420 Power Supply Programmer - Manual (Page 127)

Rev. 7 109
Appendix
Quench I/O Connector
A.5 Quench I/O Connector
Connector J4 provides pins for quench detection input, quench detection
output signals, and optional switching of an external persistent switch
heater power supply. The shell lugs of the connector are connected to the
Model 420 chassis ground. J4 is a 9-pin D-sub female connector.
Table A-3. Connector J4 pin definitions.
Pin Function
1 Quench Output +
2 Quench Output
−
3 Ground
4
Optional External Power Supply
a
a. See discussion on page 61 for further details on the use of
an optional external power supply for heating the persistent
switch.
5 Optional External Power Supply
6 Quench Input +
7 Quench Input
−
8 +5 VDC
9 Spare TTL Output (do not connect)
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