Series 3700 System Switch/Multimeter User's Manual
Section 6: Model 3750 Additional Information
3700S-900-01 Rev. C / July 2008
6-9
NOTE
The minimum gate input setup time must be satisfied for the event to
be counted.
Analog output
There are two channels of isolated analog outputs on the Model 3750 card.
Each channel can be configured for either voltage output or current output.
Voltage output provides for +/- 12 V and is capable of providing up to 20 mA of
current. Current output can be either 0-20 mA or 4-20 mA. The voltage outputs
also support programming of up to 1% over the full scale range. This can be
used to compensate for constant voltage drops in the system and cabling.
Each channel has its own separate common return line that provides the
reference point for the output. These
lines are labeled as “VCOM” for the voltage
output and “ICOM” for the current output. If the outputs are to be referenced to
some other point such as earth ground, the respective common return signals
must be connected appropriately.
Each output is connected through an onboard output relay. Both the output
signal and its corresponding return are connected at the same time that the
output becomes enabled. Disabling the output opens this output relay.
The following examples use the first analog output channel of a card in Slot 1,
so the nomenclature for the channel is
'1010'
.
