Watson-Marlow 403U - Manual (Page 4)

4
Remote control
The 403U and 405U drives can be controlled remotely via 0-10V or 4-20 mA analogue signals. 400AC1, 400AC2,
400AC3 and 400AC4 remote control cables with a 15-pin D-sub connector are available from your local Watson-
Marlow dealer. Wiring diagrams for each control cable are shown at the bottom of this section.
When using the 400AC1 (0-10V) or 400AC2 (4-20mA) remote control cables for analogue speed control and
switching cw/stop/ccw:
 Set the pump to stop by pressing the Stop key.
 The keypad speed control setting sets the range of the remote speed signal, and it can be adjusted during remote
control use. (If the manual speed is set 50%, only 50% of maximum speed will be achievable at 10V or 20mA). It
is advisable to set the speed to 99.9% for full analogue speed range control.
 Start or stop the pump in either cw or ccw direction remotely as shown in the relevant wiring diagrams. If the
remote switch is set to stop, cw or ccw direction switching can be achieved using the keypad.
When using the 400AC3 cw/stop/ccw remote cable
 Set the pump speed manually using the  or  keys.
 Start or stop the pump in either cw or ccw direction remotely as shown in the relevant wiring diagram. If the
remote switch is set to stop, cw or ccw direction switching can be achieved using the keypad.
With a remote direction switch connected and the remote cw/stop/ccw switch set to cw or
ccw, you cannot switch direction manually. However, you can stop the pump manually
using the keypad which is designed to be used as an "emergency stop". The remote
cw/stop/ccw switch needs to be set to stop to release the "emergency stop".
When using the 400AC4 start/stop 3m remote cable with footswitch fitted:
 Set the pump to stop by pressing the Stop key
 Pressing the footswitch will start the pump in the cw direction only. Releasing the footswitch will stop the pump.
In the event of a power failure when the pump is under remote control, the pump will automatically
re-start when the power is returned.
400AC1 400AC2 400AC3
Care and maintenance
The only scheduled maintenance of the pump unit is to replace the motor brushes and to replace them when
necessary, understanding that motor brushes are not covered by the two year warranty. It is recommended that this
work be carried out by a Watson-Marlow servicing agent. The life of the brushes depends on the duty of the pump but
is expected to be at least 2500 hours at maximum speed for the 403U and 5000 hours for the 405U.
If the pump requires cleaning use a mild solution of detergent in water after removing the pumphead. Do not use
strong solvents.