Keithley 3700 series Installation Instructions Manual page 4

Series 3700 Cable and Connector Kits Installation Instructions
Model 3721-MTC-1.5 / 3.0
The Model 3721-MTC-1.5 / 3.0 cable is a 50-pin cable assembly (1.5m (5 ft) or 3.0m (10 ft) in length) terminated
with a male D-sub connector on one end and a female D-sub connector on the other end.
Figure 3: Model 3721-MTC-1.5 / 3.0 cable
WARNING
Cable maximum signal levels
The Model 3721-MTC-1.5 / 3.0 cable is rated for 300V DC or 300V RMS.
Maximum current rating
The Model 3721-MTC-1.5 / 3.0 cable maximum current ratings are as follows:

Single conductor: 4.4A

Multiple conductors: 2.2A per wire

Conductor gauge: 22 AWG
Pin number identification
Pin number identification for the Model 3721-MTC-1.5 / 3.0 D-sub connectors are shown in Figure 4 and Table 3 below
Figure 4: Model 3721-MTC-1.5 / 3.0 pin number identification
Male D-sub connector:
1
18
34
4
Make sure the instrument that you are installing is in a powered-down state
with all cables unplugged. Failure to install an instrument in a discharged
state may cause personal injury or death from electrical shock. Do not
exceed the maximum specifications of the switching module.
To prevent electrical shock, observe the following safety precautions:
• Both ends of the cable must be connected before applying any power
to the system.
• Remove all power in the system before connecting the cable to a
switching module or external circuitry.
• Both D-sub connector shells of this cable must be connected to a
safety earth ground. A shock hazard exists when voltage levels greater
than 30V RMS, 42.4V peak, or 60V DC are present.
17
33
50
Female D-sub connector:
17
33
50
:
1
18
34
PA-949 Rev. D / May 2011