Watson-Marlow 520DUN User Manual page 60

Watson-Marlow 520DuN IP66/NEMA 4X User Manual
If necessary, unplug the two 25-way D-connectors linking the module to the
pump drive. If necessary, remove the module's earth link from the back of the
drive. However, the link is long enough to allow the module to fold back to give
access to the the circuit board inside and to the back of the drive.
To replace the 520N watertight module:
Check that the fuse in the fuseholder (ringed) in the centre of the switchplate
does not need to be replaced. Check that the voltage selector switch is correct-
ly set for your power supply.
Check that the sealing strip is fully in its channel on the face of the module.
Attach the module's earth link wire. Replace and tighten its screw to 2Nm.
Push home the female (upper) and male 25-way D-connectors on to their coun-
terparts on the rear of the drive.
Hold the module in place, taking care not to disturb the seal or pinch the earth
link wire or D-connector ribbon cables, and screw in the six retaining screws
(top centre screw first). Tighten to 2.5Nm.
Note: Ensure that the 520N module is properly fitted at all times using all six
screws. Without the module and the screws, the screw holes may corrode and IP66
(NEMA4X) protection will be compromised.
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