2-4 Close/Open Switching Module Channels Model 2750 Multimeter/Switch System User’s Manual
Connections
WARNING Connection information for switching modules is intended for quali-
fied service personnel. Do not attempt to connect DUT or external cir-
cuitry to a switching module unless qualified to do so.
To prevent electric shock that could result in serious injury or death,
adhere to following safety precautions:
• Before making or breaking connections to the switching module,
make sure the Model 2750 is turned off and power is removed from
all external circuitry.
• Do not connect signals that will exceed the maximum specifica-
tions of switching module.
If both the front panel terminals and the switching module terminals
are connected at the same time, the test lead insulation must be rated
to the highest voltage that is connected. For example, if 1000V is con-
nected to the front panel input, the test lead insulation for the switch-
ing module must also be rated for 1000V.
Dangerous arcs of an explosive nature in a high energy circuit can
cause severe personal injury or death. If the multimeter is connected to
a high energy circuit when set to a current range, low resistance range,
or any other low impedance range, the circuit is virtually shorted. Dan-
gerous arcing can result even when the multimeter is set to a voltage
range if the minimum voltage spacing is reduced in the external con-
nections. For details to safely make high energy measurements, see
“High energy circuit safety precautions,” page 3-3.
As described in the International Electrotechnical Commission (IEC)
Standard IEC 664, the Model 2750 is Installation Category I and must
not be connected to mains.
For the Model 7700, detailed connection and wiring information is provided in
Appendix B of this manual (Model 7700 Connection Guide).
2750-900-01.book Page 4 Wednesday, August 3, 2011 7:56 AM
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