APT3200
Smart Pressure Transmitter
Operation Manual M3200-E01G
22
Duon System Co.,Ltd.
4.5 General Considerations
This transmitter uses the Piezo-Registive pressure sensor. If it changes the pressure sensor, capacitive
pressure is changed minutely.
It transfer electrical signal minutely to 4~20mA analog signal. Thus mount the transmitter close to the
process and use a minimum of piping to achieve best accuracy. However keep in mind the need for
easy access, safety of personnel, practical field calibration, and a suitable transmitter environment.
In general, install the transmitter so as to minimize vibration, shock, and temperature fluctuations.
4.6. Electrical Considerations (Power Supply)
The transmitter housing composes of two parts. One side is electronics circuit, and other side is
Terminal Block. Terminal Block side is transmitter's frontside and is indicated " Field Terminal" in
transmitter housing external. Open this side's housing cover, there is Terminal Block in housing inside.
Consider to this Terminal Block polarity, connect to Transmitter's Power Supply. Configurator supported
HART connects to "COMM" pin in Power Supply downside. In the field Indicator connects to "TEST"
pin.
4.6.1 Power Supply
In the transmitter's power supply Input Current Voltage is currently DC voltage between DC 11.9
volt ~ 45 volt and power supply's ripple is not up to 2%. Loop resistance means all resistor sums
in loop.
In case of using Intrinsic Safety Barrier, same includes resistor of barrier.
Max. Loop Resistance [
Ω
] = (E-11.9) [vdc] / 0.022 [mA]
Here, loop resistance is preferable at 250 ~ 550
Ω
(24 Vdc) for the HART communication.
4.7. Wiring
4.7.1 Caution of Wiring
(1) Install cable in the far from electrical noise resources like capacitive transformer, motors
power supply as soon as possible.
(2) Before wiring put out electrical lead connect cap.
(3) All screw-lined portions paste suture for waterproof. (It promotes the silicon type that is not
hardened.)
(4) Don't lead signal line to power line in same duct for no received noise signal.
(5) The explosion-proof transmitter in order to maintain the explosion-proof quality of the
corresponding transmitter effectively follows in the demand explosion-proof specification that
is provided and must be lead.
