2.3
Remote control wiring
Never apply mains power to the D-connectors. Apply the correct signals to
the pins shown. Limit signals to the maximum values shown. Do not apply
voltage across other pins. Permanent damage, not covered by warranty,
may result.
Interfacing the 120U pump with other devicesisby meansof a female 15-pin D-connector atthe rear of the
pump.
A mating male connector, screened for EMC compatibility, must be conventionally soldered to a screened
controlcable.
Recommended controlcable: 7strands0.2mm, 24AWG, screened, circular, up to 15-core.
The 15-way D-connector must be connected before power is supplied to the pump. If any
change is made later to the 15-way D-connector, it must be re-connected before power is
supplied to the pump.
Thispump passesallEMC compatibility requirementswith up to 3m (10ft) of the cable type specified above.
Beyond thisdistance itisthe user’sresponsibility to ensure the pump issafe and reliable under remote and
automaticcontrol.
To minimise EMC interference the wiring to the 15-pin D-connector must be screened. The screen must be
earthed at the signal end of the wiring. To further reduce EMC the screened wiring must be threaded once
or twice through a ferrite tubular cable shield or a hinged clamp core.
The signalground and DC supply ground lineson thispump are isolated from ground by the externalDC
supply unit. It can be connected to isolated 0V or grounded 0V interfaces. The TTL (transistor transistor
logic) output is composed of two states: nominally 0V and 5V; but in practice <0.4V (<16mA) and 2.4-5V
(<0.4mA). They arenotsuitable for driving relays.
m-120-en-02
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