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Instruction Manual
D104738X012
NOTICE
Resistors are required when using limit switches. Failure to correctly install a limit switch resistor when required, as
illustrated in figure 10, could result in permanent damage to the 4400 transmitter.
1. Remove the terminal box cover.
2. Route the field wiring into the terminal box through the conduit connection, see figure 9.
Note
Install conduit using local and national electrical codes relevant to the connection.
3. Connect the control system input channel positive wire to the LOOP + terminal (see figure 10 for wiring diagram.)
4. Connect the control system input channel negative wire to the LOOP - terminal (see figure 10).
5. Install a 250 ohm resistor to provide correct impedance for HART communication on the LOOP - terminal.
6. Replace and hand tighten the cover on the terminal box.
Figure 9. Transmitter without Cover
4-20 mA WITH
HART CONNECTION
CONDUIT
CONNECTION
CONFIGURATION
LOCK SWITCH
SWITCH TERMINAL
LED INDICATOR
ZERO PUSHBUTTON
SPAN PUSHBUTTON
FAULT HIGH OR LOW SWITCH
CONDUIT
CONNECTION
4400 Transmitter
October 2023
13
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