Series 3700A Switch and Control Cards Reference Manual
Section 11: Model 3732 quad 4x28 reed relay matrix card
3700AS-909-01 Rev. A / Preliminary
11-11
Direct wiring
You can also use direct wiring to create custom connections to the Model 3732 card.
WARNING
Before making or breaking connections, make sure you turn off the Series 3700A and
disconnect the line cord. Also, remove any other external power connected to the instrument,
Series 3700A cards, or connected devices under test (DUTs). Failure to disconnect power
before making or breaking connections may result in personal injury or death due to electric
shock.
The next table shows modified jumper settings for direct wiring using the Model 3791-KIT78-R D-sub
connector kit, Model 3720-MTC-3 cables, or Model 3720-MTC-1.5 cables to create different
configurations.
Modified jumper settings and connections for direct wiring:
Configuration
Signal
Connector
and pin
location
Dual 4x56**
Dual 8x28
Single 16x28
BPID1
J4, Pin 76
Open*
Open
Open
J4, Pin 77 Open
J4, Pin 77
BPID2
J4, Pin 78
Open
J4, Pin 77
Open
J4, Pin 77 Not used
Not used
BPID3
J3, Pin 77
Open
Open
J4, Pin 77 Open
J4, Pin 77
J4, Pin 77
+IILK
J3, Pin 76
J3, Pin 78
J3, Pin 78
J3, Pin 78 J3, Pin 78 J3, Pin 78
J3, Pin 78
-ILK
J3, Pin 78
J3, Pin 76
J3, Pin 76
J3, Pin 76 J3, Pin 78 J3, Pin 76
J3, Pin 76
*Open = No connection
**There are two different ways to direct-wire the dual 4x56 configuration. The first column shows one way to
connect and the second shows an alternative.
NOTE
For detailed D-sub connector pin assignment information, refer to the "Pin assignments and signal
naming" tables for the desired configuration in the
Hardware interlocks
The Model 3732 card and Model 3706A have hardware interlocks to prevent unsafe exposure to high-
voltage signals. These interlocks are designed to keep the Model 3732 disconnected from the system
backplane. To close any Model 3732 backplane relays, the interlock circuit must be engaged by
connecting the +ILK and -ILK signals. If you attempt to close a backplane relay without these signals
connected, the relay will not close and an error message will be displayed.