JH240 Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – 2-WIRE RTD TRANSMITTER

JH240
2-WIRE RTD TRANSMITTER
FEATURES
• For 100 ohm Platinum RTDs – Linearized
• Three-Wire Lead Resistance Compensation
• Low-Drift Input Amplifier
• Fits Standard Connection Heads
• -40 to +80 Degree C Operation
• Quick-Check Output LED
• DIN Rail Mounting Available
DESCRIPTION
The Model JH240 2-wire transmitter provides a 4/20mA current loop output proportional to temperature as measured
by a 100 ohm platinum RTD (resistance thermometer). A fixed-range device, it is precisely calibrated to your specified
input range at the factory. (For a rangeable 2-wire RTD transmitter see Model JH245.) RTD linearization is provided.
Three-wire input circuitry eliminates errors due to lead wire resistance. Conformal coating protects the circuitry
against condensation and corrosion in industrial atmospheres.
The JH240 is a loop-powered device. Connected in series between a 24Vdc supply and readout instruments, it
receives its power from the 4/20mA output loop. A built-in LED indicates loop current: dim at 4mA, bright at 20.
The JH240 does not provide input/output isolation.
Its small 1-3/4 inch diameter allows the transmitter to fit most standard thermocouple-type connection heads. It also
may be surface mounted. A DIN rail mounting clip option is available.
HOW TO ORDER
OEM PRODUCTS
Model Number: JH240.
Input Range:
Specify any range allowed by the
“Input Capabilities” spec (see
back).
RTD Type and Curve:
100 ohm platinum RTD only.
Standard DIN/IEC calibration is
normally used. If a different
platinum RTD curve is needed,
please specify on your order.
Output Range:
(Always 4/20mAdc.)
Power:
(Always dc loop powered.)
DIN-Rail Mounting:
Change model number to Model
JH240-DIN. (See “Installation
and Connections,” below.)
Note: Urethane coating is standard.
JH Technology 2-wire thermo-
couple and RTD transmitters can
be made available with solder-
jumper pads for range selection.
Contact the factory for details.