ABB Navigator 550 Procedure di sostituzione - Pagina 5

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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:

2. Loosen cable gland

and disconnect the Modbus cable

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

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

from the terminal block

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

4 Replacement procedures