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Operating Manual
Transducer Excitation
The amplifier offers two options for powering the desired transducer. A regulated 5.0 ±0.1Vdc supply is
available on Transducer Pin 5 that can source up to 100mA. For other supply voltage requirements,
Transducer Pin 1 should be used which is the pass through power from the 5-30Vdc excitation source.
This output is not regulated and should be a clean supply to the transducer.
The wiring connection diagram is illustrated below.
Do not connect both Pin 1 and Pin 5 from the transducer. Connect only one of the pins depending
on if the regulated 5Vdc power supply will be used or the pass through power from the excitation
source.
When using the 5Vdc regulated supply (Pin 5), the excitation voltage needs to be derated for a given
current draw. The derating curve is illustrated below.
For example, a transducer requiring a current of 50mA can not have an excitation voltage applied to the
140 that exceeds 10.5Vdc.
There is no restriction on the pass through power (Pin 1).
Measurement Specialties, Inc.
32 Journey, Suite 150, Aliso Viejo, CA 92656 USA
5Vdc Regulated Output Derating Curve
35
30
25
20
15
10
5
0
1
CURRENT DRAW (mamps)
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