Emerson Rosemount 228 Reference Manual page 17

6.
7.
8.
9.
10.
11.
Rosemount 228 Sensor
Figure 2-6: Sensor-mounted junction box wiring
Note
The wiring diagram shown is for the cable PN 23294-00, which has three RTD (TC) leads. If you are
useing cable PN 23294-05, which has four RTD (TC) leads, connect the green, white, and clear
wires in the RTD bundle as shown in the drawing. Do not disconnect the black wire. When you
reconnect the RTD wires in PN 23294-05 to the transmitter, make the connections as described in
Step 6 (this section) or Step 3 (Installing the Mechanical Retraction
Connect the other end of the cable to the transmitter. See the wiring diagrams in
Figure 3-2, Figure 3-3, and
228-54 sensor. For cable PN 23294-05, follow the wiring for the 228-56 sensor with
the following exception:
Refer to the wire function diagram for the 228-56 option in
the RTD wire bundle. Connect the RTD wires to the transmitter as follows:
• Green - RTD in
• Black - No connection
• Clear - RTD common or RTD return
• White - RTD sense
Wrap the bare end of the black wire to prevent accidental connections.
Insert the sensor and tube assembly into the retraction chamber.
Tighten the union nut.
Open the ball valve, check for leaks, and manually insert the sensor into the process.
Position the sensor at least 1/2 in. (13 mm) away from any wall of the vessel or pipe.
Tighten the collet nut.
Figure 3-4. For cable PN 23294-00, follow the wiring for the
Install
Assembly.
Figure 3-1 and identify
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