Series 3700A Switch and Control Cards Reference Manual
Section 3: Series 3700A cards power usage
3700AS-909-01 Rev. B / December 2011
3-9
Interlock pin numbers
The following table shows the interlock pin numbers for all applicable switching cards.
Model
Interlock circuit
Interlock pins
Backplane relays
affected
Other relays affected
3720
Multiplexer #1
76, 78
n911 through n916
Multiplexer #2
76, 78
n921 through n926
3721
Multiplexer #1, Amps,
DMM
33, 50
n911 through n917
n041, n042 (Amps),
n928 (DMM HI / SHI)
Multiplexer #2
1, 34
n921 through n927
3722
No Interlocks Present
-
-
3723
Multiplexer #1
76, 78
n911 through n916
Multiplexer #2
76, 78
n921 through n926
3724
Multiplexer #1
76, 78
n911 through n916
Multiplexer #2
76, 78
n921 through n926
3730
Matrix #1
48, 50
n911 through n916
3731
Matrix #1
38, 50
n911 through n916
3732
Bank 1, 2, 3, 4
J-3-76, J3-78
s0911 through s0918
3740
Independent Switch
Bank #1
48, 50
n911 through n916
3750
No interlocks present
WARNING
Take special care not to inadvertently wire high-voltage analog signals to the interlock pins.
Instrument damage or loss of functionality can occur.