22 automatic control wiring – Watson-Marlow 520Du User Manual
Page 60
Watson-Marlow 520DuN IP66/NEMA 4X User Manual
60
22 Automatic control wiring
Interfacing the pump with other devices is by means of three D-connectors at the
rear of the pump. There are two 25-way D-connectors. The top one is male, the bot-
tom one is female. Mating female and male connectors, screened for EMC compati-
bility, must be conventionally soldered to screened control cables.
Recommended control cable: 7 strands 0.2mm, 24AWG, screened, circular, up to 25-
core. The cable screen should be earthed either through the functional earth pin on
the D-connector (pin 1 on the upper (male) 25-way D-connector) (pin 13 on the
lower (female) 25-way D-connector), or through the metalwork of the socket or
plug.