DAQM908A 40-channel single-ended multiplexer
The module is divided into two banks of 20 channels each. All of the 40 channels switch HI only, with a com-
mon LO for the module. Use this module for high-density switching applications which require single-wire
inputs with a common LO.
Only one channel can be closed at a time, closing one channel will open the previously closed chan-
nel.
This module cannot be used to directly measure current or any 4-wire measurements.
TO PREVENT ELECTRICAL SHOCK
To prevent electrical shock, use only wire that is rated for the highest voltage to any channel. Before
removing a module cover, turn off all power to external devices connected to the module.
CAUTION WITH MULTIPLE SIGNALS
To avoid the possibility of multiple signal sources becoming connected together, we recommend
when multiplexing two or more sources they should be connected on separate modules or on sep-
arate banks of the same module.
CAUTION WITH HAZARDOUS VOLTAGES
When any channel is connected to a hazardous voltage source, all channels in the module should
be treated as hazardous and all channel wiring in the module should be rated for the maximum
voltage applied. Thermistors attached to any other channel on the module should have insulation
rated for the maximum voltage, or have additional insulation added rated for the maximum voltage
and should be isolated from conductive parts using a thermal compound or tape rated for the max-
imum voltage applied. Do not mount, move, or remove any thermistors when the device under test
is connected to a supply source.
ENVIRONMENTAL HEALTH AND SAFETY
When any channel is connected to a hazardous voltage source, the instrument and the device under
test should be supervised, following local EHS practices to restrict access.
[Channel] Menu Overview
174 Keysight DAQ970A User's Guide
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