ABB Navigator 550 Replacement Procedures page 5

4.5 Replacing the Modbus cable assembly
Modbus cable part numbers:

AW502 090 / 1.5 m (4.9 ft.)

AW502 091 / 5 m (16.4 ft.)

AW502 092 / 10 m (32.8 ft.)

AW502 093 / 20 m (65.6 ft.)
Referring to Section 4.2, page 3:
1. Remove the wet-section PCB cover.
Referring to Fig. 4.7:
A
2. Loosen cable gland
and disconnect the Modbus cable
C
connections marked black, red, screen, green and white.
3. Withdraw the Modbus cable
main case assembly and discard.
4. Feed the replacement Modbus cable into the main case via
E
the guide channel
remake connections to the black, red, screen, green and
white PCB wet-section terminals and at the transmitter.
5. Refit the PCB cover by reversing the removal procedure.
Fig. 4.7 Replacing the Modbus cable assembly
at the wet-section PCB housing
D
from the terminal block
D
from the PCB housing and
at the top, feed through the gland and
B R
SCR
G W
Navigator 550 | Low level dissolved oxygen wet-section | Spares replacement procedures | INF12/113–EN Rev. C
B
4 Replacement procedures
5