Datasheet

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34959A breadboard module
Use this module to create your own custom designs inside the 34980A mainframe. You can control your
custom circuits with access to both the +12 V and +5 V supplies, 28 relay drive lines and two 8-bit GPIO
ports. Your design can be isolated from the analog buses or connected by loading the backplane
switches. Simply mount your custom PC board or other components into the space provided and connect
via the two ribbon connectors provided. The module is provided with two 50- or 78-pin Dsub connector
openings. For custom connections, use the detachable flat faceplates for easy modification. You can
program your circuitry using standard read and write commands in SCPI.
34959A breadboard module
General specifications
Max module power dissipation
6 W
Power available:
12 V regulation no load to full load
5 V regulation no load to full load
Max power from 12 V
Max power from 5V
10%
5%
6 W
1 W
Relay drives
Channels
28, sink up to 100 mA
Max Input Voltage
42 V
Leakage Current
8 µA
GPIO ports
Chan 1 and Chan 2
8 configure bits as input or output
Chan 3
3 output bits
High input
2 V min, 5.5 V max
Low input
0 V min, 0.8 V max
High output
2.4 V @ 4 mA, 3 V @ 500 µA
Low output
0.4 V @ 8 mA
Available space for internal board/components: 5.4 x 7.5 x either 0.9 inches height without PC board, or
0.7 inches high with PC board.
Figure 19: 34959A breadboard module