Emerson Rosemount Oxymitter DR Reference Manual page 88

™
Upgrade Rosemount Oxymitter DR to full Oxymitter
October 2019
7. Plug the black four-wire connector into the black socket on the microprocessor
8. Tighten three screws (D) securing the electronics assembly into the termination
9. In the left side of the termination housing, place the new termination designation
10. Remove the 4-20 mA wires from the old electronics and re-terminate them to the
11. Convert the wires carrying the heater to power to carry AC power (80-250 Vac,
88
card.
housing.
over the labels on the existing terminal block.
After placing the new labels, the terminal block should appear as shown in
B-2.
Figure B-2: Terminal Block and Wiring
A. Terminal block
B. AC line voltage port
C. Ground lugs
D. Signal port
E. Left side of transmitter
F. 4-20 mA signal
G. Logic I/O or calibration handshake
H. Line voltage (90 to 250 Vac)
I. AC terminal cover
You can reuse the existing wires from the transmitter to the electronics. However,
the wires will be carrying new signals as noted by the new labels.
wires carrying the 4-20 mA signal to the control room.
50/60 Hz) for the transmitter.
The re-termination may be inside the old electronics housing, which will function as
a simple junction box. Alternatively, you can remove the old electronics housing
and replace it with a smaller junction box.
Reference Manual
00809-0100-4880
Figure
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