Micropump DB-380.B - Manual (Page 7)

7 of 20 MODEL 380 MOTOR INSTALLATION AND OPERATION MANUAL IOM # 7820
REV A
(10/99)
MICROPUMP, INC.
A Unit of IDEX Corporation
PO Box 8975, Vancouver, WA 98668-8975, USA
Phone: (360) 253-2008
Fax: (360) 253-2401
email: [email protected]
Website: www.micropump.com
MICROPUMP LIMITED
A Subsidiary of Micropump, Inc.
Howard Road, Eaton Socon
St. Neots, Cambs. PE19 3ET England
Phone: (44) (0) 1480-356900
Fax: (44) (0) 1480-356920
Website:
www.micropump.com
Mounting Plates and Adapters
This section is intended to cover installation of Micropump supplied pumps with the Model 380 motor. If you have purchased a
pump/motor combination this will be assembled ready for installation.
If you have purchased a motor without a pump, the pump will have been supplied with a plastic or metal adapter that mounts to the
square aluminum flange. The adapter allows the pump to be securely mounted to the motor. If you have the incorrect adapter for
your pump, the pump and motor will not mount together. Please contact your Micropump distributor for assistance.
Motor mounting screws are not supplied when a pump only is
purchased.
Electrical Connection. Refer to the figures on page 14-15 for connection details. The Model 380 drive does not incorporate any
fusing. A 5 Amp, fast-acting fuse between the power supply and the motor is recommended. There is an internal 1000uF capacitor
with an ESR of 0.2 Ohms between the positive supply lead (red wire) and the motor common (black wire). This can cause an inrush
current whose exact nature will vary with your power supply. The gradient of the inrush can be reduced by adding a low value
resistor (up to 1.0 ohm) in series with the positive supply lead. However, this will limit the maximum power output of your motor
(to 35 watts, in the case of a 1.0 ohm resistor). The resister wattage should be appropriate for the application. If you need help
selecting a fuse and/or series resistor, please contact your Micropump distributor.
The input voltage, the 0-5 VDC control input and the tachometer output all use a common ground. Any potential difference between
the grounds of the power supply, control voltage source, and the customer supplied frequency counter (if used) will be forced to the
same ground reference when connected to the Model 380 drive. While not typical, in some cases undesirable currents can flow
through these devices' ground wires if more than one device is connected to earth ground. Ensure only one earth ground is used.
Voltage is not normally applied to the tachometer, but in case of misconnection, the tachometer can withstand an applied voltage in
the range of +/-30VDC with respect to the motor common (black) wire. Also, the speed control (white) wire can also withstand an
applied voltage in the range of +/-30VDC with respect to the motor common (black) wire. When the speed control wire is connected
to more than 5 volts, the motor will run at its maximum speed. When the speed control wire is connected to less than zero volts, the
motor will stop.
To maintain EMI compliance, connect the shield (bare wire) to the motor common (black wire) when wiring the motor.
Note that the motor common (black wire) is isolated from the motor housing. There is an internal 220nF, 63V capacitor between the
motor housing and motor common. If an earth ground is required for the motor housing, the grounding wire can be bolted to the
NOTE