NT PRESSURE TRANSDUCER MODELS 4100, 4210
5
Entegris, Inc. | User Guide
Load Resistance: Current Output
(4–20 mA Configuration)
If a load resistor, R
Load
, is used
in series with the current output,
the value of R
Load
is dependent on
the supply voltage and the meter
resistance and is calculated from
the following formula:
Load Resistance: Voltage Output
(0–5, 0–10 VDC)
The output impedance is 1 kOhm.
The input impedance should
be ≥1 megohm for ±0.1% load
impedance error.
850
12
24
29
Power supply
voltage
(VPS)
Operating
region
R
Load
(Ohms)
0
Figure 1. Power required for a 4–20 mA loop.
R
Load
=
– R
meter
R
Load
R
meter
where:
=
maximum load
resistance (ohms)
= power supply
voltage (volts)
= meter resistance (ohms)
(theoretically = 0)
V
PS
V
PS
– 12 V
20 mA
WARNINGS
—
WARNING! For use in Class I
Division 2 Hazardous Environ-
ments, models with disconnecting
cable options must be wired in
accordance with the control
drawing 01-1033562 on page 17.
WARNING! Do not remove or
replace while circuit is live unless
the area is known to be free
of ignitible concentrations of
flammable substances.
WARNING! Do not replace comp-
onents unless power has been dis-
connected or the area is known to
be free of ignitible concentrations.
WARNING! Explosion hazard.
Do not connect while the circuit is
live or unless the area is known to
be free of ignitible concentrations.
WARNING! Substitution of com-
ponents may impair suitability for
Division 2.