Instruction manual

Instruction Manual
D200354X012
4200 Transmitters
July 2013
18
For reverse action, exchange the positions of the brown and red wires.
Arrange wires on the terminal block (TB1) for either direct or reverse action to match the application requirements;
then repeat the potentiometer alignment procedures.
Refer to the Calibration section to adjust the zero and span of the transmitter and/or position switch circuits.
Operating Information
Initial Considerations
If the transmitter is ordered with an actuator, the transmitter is factory calibrated to the length of travel specified on
the order. If the transmitter is ordered separately, adjust the zero and span as described in the Calibration section so
that the transmitter operates properly in your specific application.
If the transmitter is calibrated for a specific control valve actuator travel, perform the procedures in the Calibration
section to fine tune the zero and span adjustments to the specific application.
Transmitter and Position Switch Conditions
D A 4210 or 4220 transmitter (with position switches) obtains stem position from the input potentiometer and circuit
electronics to provide a 4 to 20 milliampere output. The transmitter output connects to a terminal block mounted
in the field wiring compartment. The high position switch circuit output controls relay K1 mounted on the field
circuit printed wiring board, and the relay contacts connect to TB1. The low position switch circuit output controls
relay K2, and the relay contacts connect to TB2. The relationship between the transmitter output, relay position
switch outputs, and deadband is shown in figure 7. Deadband is the difference between trip and reset points of a
relay.
D A 4211 or 4221 transmitter (without position switches) obtains input information from the potentiometer and
provides a 4 to 20 milliampere output. The transmitter output connects to the barrier strip (key 11, figure 4)
mounted in the field wiring compartment.
D A 4212 or 4222 position switch (without the transmitter) obtains stem position from the input potentiometer and
provides position switch outputs from relays K1 and K2 (figures 4 and 9). The high position switch circuit output
controls relay K1 mounted on the field circuit printed wiring board and, the relay contacts connect to TB1. The low
position switch circuit output controls relay K2 and, the relay contacts connect to TB2. Deadband is the difference
between trip and reset points of a relay.
D A 4215 transmitter obtains position information from a dual potentiometer on the same shaft, which allows for
individual potentiometers for the transmitter circuit and the position switch circuits. The transmitter input is from
one of the potentiometers and its output connects to TB3 (figure 6) mounted on the field circuit printed wiring
board. The position switch input is obtained from the other potentiometer.
The high position switch circuit output controls relay K1 mounted on the field circuit printed wiring board and the
relay contacts connect to TB1. The low position switch circuit output controls relay K2 and the relay contacts connect
to TB2. The relationship between the transmitter output, relay position switch outputs, and deadband is shown in
figure 7. Deadband is the difference between the trip and reset points of a relay.