Watson-Marlow 620U - Manual (Page 59)

Watson-Marlow 620UN, 620U, 620SN, 620S User Manual 59
Use a 19mm spanner to unscrew the sealing plug. Discard the nylon sealing
washer.
Screw in one of the supplied M16x1.5 cable glands in place of the plug, using
the new nylon sealing washer supplied. Tighten the gland to 2.5Nm to ensure a
seal, using a 21mm spanner. If a different gland is used, it must be watertight
to IP66.
Loosen the gland cap (do not remove it) and pass the cable in through the
gland. When it has passed through the gland, continue to push the cable
through.
The inside of the module is shaped to guide the cable past the printed circuit
board inside. Continued pushing will feed in enough cable to grip inside the
module with the fingers.
Pull through sufficient cable to reach the connectors required. Leave a little
slack.
Strip the outer sheath as necessary and remove 5mm of insulation from the
conductors. No tinning or ferrule is required. Note: If very stiff or large-diame-
ter cable is used, it may be convenient to strip the outer sheath before passing
the cable’s conductors through the gland. However, to ensure a seal, cable with
an undamaged sheath must be present within the gland when it is tightened.
Twist a suitable length of the cable screen. Loosen one of the pcb retaining
screws and wind the shielding round it. Secure the screen by refastening the
screw. Alternatively, secure the cable screen to the adjacent spade connection
(where fitted).
Push the bared conductor into the square hole in the connector. When the con-
ductor is fully in, tighten the retaining screw to hold it in place.
When all conductors are in position, use a 21mm spanner to tighten the gland
cap to 2.5Nm to ensure a seal. Alternatively, tighten the gland by hand until it
is finger-tight and use a spanner to tighten it further by one-half a turn.
Do not strap the control and mains power cables together.
620N watertight module pcb connectors: