Accsense VersaLog Data Loggers User’s Manual Page 36
Excitation Output
Excitation output is used when you need to save the electric power of the device that provides
the signal source to the data logger. When there is no local power available and a battery pack is
used to power the transducer, excitation control greatly reduces power consumption. It turns on
the transducer only when it samples the data and turns off the transducer after the sampling.
A2/EXT on the terminal strips can be configured by VersaLog SiteView software for excitation
output purpose.
The following schematics illustrate the physical connections required to switch on/off an
external battery pack for a 2-wire current loop transmitter:
Power Supply
+12 VDC
GND
CH1
A2/E
A1
COM
CH7
CH6
COM
CH5
CH4
COM
CH3
CH2
COM
Transmitter (4-20mA)
+
-
Coil Relay
+
-
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