Watson-Marlow Qdos30 Universal - Manual (Page 22)

Watson-Marlow qdos30 Universal and Universal+ Pump User Manual 22
12.2 Wiring up the terminal connectors
It is the user’s responsibility to ensure the pump’s safe and reliable operation under
remote and automatic control.
Cable entry to the module is via two watertight cable glands on the module cover.
These may be fitted in place of the sealing plugs which are fitted to the side of the
module cover when the pump is shipped.
The number of glands needed depends on the number of connection cables required
and the convenience of the installer. As standard, two ½” cable glands are provided
with the pump.
Recommended control cable conductors for the terminal blocks: metric = 0.14sq mm
- 2.5sq mm solid and 0.14sq mm - 1.5sq mm stranded. USA = 26AWG - 14AWG solid
and 26AWG - 16AWG stranded. Cable: circular. Max/min outside diameter to ensure
a seal when passed through the standard gland: 9.5mm-12mm. The cable section
must be circular to ensure a seal.
For EMC protection, shielded control cable should be used. The shielding should be
terminated to either of the provided spade connections.
Cables should have a minimum temperature rating of 85C.
Note: Screened, circular control cable up to 12 core must be used. The cable screen
must be earthed at both ends of the cable.
Suitable cables for general-purpose use: 300V with extra premium grade PVC jacket
with good flame and moisture resistance.
Suitable cables for industrial use: 300V extra-rugged polyurethane grade jacket with
resistance to oils, fuels, solvents and water.
For convenience of wiring more than 8 conductors per cable may be awkward to
handle.
• Use a suitable 21mm spanner to unscrew the
sealing plugs.
• Screw in the supplied ½” NPT cable glands
complete with new sealing washers in place
of the plug, ensuring that the retaining nut is
properly seated. Tighten the gland to 2.5Nm
using a suitable 21mm spanner, to ensure a
seal. If a different gland is used, it must be
watertight to IP66.