Watson-Marlow 521CC - Manual (Page 9)

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See the drawing below for drive motor connections, showing possible ancillary switches
and connections.
The ancillary switches should be rated to 220/240V 1ph 50Hz/60Hz. The Start contact
should have a sprung return which will disengage following energisation of coils C1 and
C1/1.
Ensure that an emergency stop switch is fitted within reach of the pump.
Do not under any circumstances wire switches directly across any of the
phases of a three-phase supply. If in doubt disconnect the pump
immediately.
Do not connect ancillary switches to the terminal box of a flame-proof
motor unless the switch has a suitable hazardous-atmosphere rating for
the area in which it is to be mounted.
AC three-phase motors must be connected to a suitable earth
terminal. It is imperative that the equipment is powered via an
isolating device and a circuit-breaking device (power contactor)
which can be controlled by an external safety system (emergency
stop, fault detector).
Correct installation and use of an AC three-phase motor with a suitably
rated frequency inverter is the responsibility of the user and should be
carried out by qualified personnel only.
Page 9 of 47 Watson-Marlow Bredel E-Manuals
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