16
CK+
CK–
+
–
To junction
terminal or
instrument
room
To HHC
Instrument room
Terminal block
DC power supply
16.1 to 45V DC
Load resistor
250
7
or more
Note)
Note) See 7.2 “Power voltage
and load resistance”.
Junction terminal
Zener barrier
Field device
To operate the FCX-AII series transmitter, the FXW communicator is used for each adjustment.
4.1 Adjustment with the FXW communicator (HHC)
The span adjustment of the transmitter can be done by using the FXW
communicator
without
applying a reference pressure. Here after you will
fi
nd the wiring of the FXW to modify the
transmitter parameters. For the use and the start up of the communicator, please refer to the
instructions of the FXW (HHC).
Remarks :
* The HHC must be on [OFF] position during the connection.
It can't be connected to the terminals CK+ and CK- of the terminal block of the transmitter.
* The HHC has no polarity. (You can connect either the red or black electrical wire to the ter-
minals
+
or
-
of the transmitter or on the wires of the loop).
HHC = Hand Held Communicator
4.1.1 Connection of HHC
The HHC can be connected in any point of the loop.
To communicate with the HHC, a load resistor of 250
Ω
mini is required.
Refer the following diagram connection of the HHC.
ADJUSTMENT
4
After adjustment of the transmitter, it should be kept energized for about 10
seconds to write the adjustment results into memory.
In the case of a
fl
ameproof transmitter, the HHC can only be connected
via the junction box located outside the hazardous area.
DANGER
In the case of a
fl
ameproof transmitter, never connect the FXW to the ter-
minal block of the transmitter in hazardous area installations.
DANGER
INDICATION
