Emerson Process Management OXYMITTER 4000 - Manual (Page 129)

Instruction Manual
IB-106-340C Rev. 4.1
July 2004
Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Service 9-11
Hazardous Area Oxymitter 4000
J8
POWER
SUPPLY
BOARD
37270022
Figure 9-6. J8 Connector
3. Loosen the three captive screws
(9, Figure 9-3 or Figure 9-4). Slide
electronic assembly (2) partially out of
housing (11).
4. See Figure 9-6. Squeeze the sides of
the J8 connector, and carefully remove
the J8 connector (heater leads) from
the power supply board.
5. Remove the electronic assembly (2,
Figure 9-3 or Figure 9-4) from the
housing(11).
6. Slide the new electronic assembly (2)
partially into the housing (11).
7. Reconnect the J8 connector to the
power supply board. Make sure the
connector is secure.
8. Holding the J1 connector leads, slide
the electronic assembly the rest of
the way into the housing. Seat the
electronic assembly on the mating
connector pins.
9. Gently try to rotate the electronic
assembly to check for full seating.
If the electronic assembly rotates,
remove the assembly and repeat
step 8.
10. Reconnect the J1 connector to the
microprocessor board (Figure 9-5).
Ensure the connector is secure.
11. Tighten the three captive screws (9,
Figure 9-3 or Figure 9-4) in the top of
the microprocessor board (5).
12. Install and tighten cover (1); make sure
it is tight. Secure the cover using cap-
tive washer (20), cover lock (19), and
screw (18).
Opening the electronic housing will
cause the loss of ALL hazardous per-
mits. Opening the electronics housing
in a hazardous area may cause an
explosion resulting in loss of property,
severe personal injury, or death. It may
be required to get a hot work permit
from your company safety officer be-
fore opening the electronic housing.
d. Terminal Block Replacement
See Figure 9-3 or Figure 9-4.
1. Remove the left side cover (17) from
the housing (11).
2. Loosen the three captive screws (16) in
the terminal block (15). Carefully lift the
terminal block out of the housing.
3. Carefully align the new terminal block
on the pins so that it sits flat in the
housing. The round end of the terminal
block should be on the opposite side of
the housing conduit ports and should
not be able to rotate.
4. Tighten the three mounting screws and
ensure the terminal block is secure in
the housing.
9