Description
The TCSA Series is a loop-powered, linear output current
transducer that provides an output that is directly proportional
to the RMS AC current passing through the onboard toroid. The
TCSA provides a 4 - 20mA output over a power supply range of
10 - 30VDC. Each unit is factory calibrated for monitoring in one
of four ranges; 0-5, 0-10, 0-20, or 0-50A. The 0 - 5A range allows
the use of external current transformers so loads up to 1200AC
amps can be monitored.
Operation
The TCSA varies the effective resistance of its output in direct
proportion to the current flowing in the monitored conductor.
The unit is factory calibrated so that 0 amps provides a 4mA
output and full span provides a 20mA output. Zero and span
adjustments are provided for minor calibration adjustments in
the field (if required).
Using an External Current Transformer (CT)
Select a 2VA, 0 to 5A output CT, rated for the current to be
monitored. Select TCSA5. Pass one of the CT’s secondary wire
leads through the TCSA’s toroid. Connect the CT’s secondary
leads together.

Features
JJ Monitors 0 - 50A in 4 ranges
JJ Loop powered from 10 to 30VDC
JJ Linear output from 4 - 20mA
JJ Zero & span adjustments
JJ Complete isolation between sensed current & control circuit