Controlling the MD 1 VARIO-SP
Connecting the cable:
As set at the factory, the pump is designed for operation
with a control signal; i.e., without a control signal, the pump
does not start!
To operate the pump without a control signal, change the
settings on the circuit board (see below)!
NOTICE
External setting of the motor speed via PWM
(factory set)
:
PWM
(pulse-width modulation; Low: 0V - 0.5V; High: 5V - 24V max.)
frame frequency: 100Hz to 1.5kHz
0% to 100% PWM: Linear increase of the motor speed:
0 rpm (at 0% PWM) to 2400 rpm (at 100% PWM)
Pump will run smoothly only at motor speeds higher
than 200 rpm.
Example: Pulse-width at a frame frequency of 1 kHz
and at 700 rpm motor speed: 0.3 ms
Selecting the control signal input:
(PWM / voltage / internal setting)
To select a control signal input other than the factory set one (PWM), the
control line at the terminal board has to be reconnected.
The control line contains four differently colored wires.
wire in control line
assignment
red
+24V DC (supply voltage, max 7A)
blue
GND (24V)
white
PWM: 5V to max. 24V or
voltage input: 0V to 10V DC (max. 24V)
(depending on the control signal input for
motor speed)
black
GND Signal
Summary of Contents for MD 1
Page 27: ...page 27 of 72 MD 1 MD 1 C US pump with dual voltage motor 4 9 8 7 5 6 3 2 1 2 1 2 1 ...
Page 28: ...page 28 of 72 MD 1 VARIO SP Ensure sufficient venting of the pump 9 5 6 7 10 ...
Page 53: ...page 53 of 72 1 2 1 2 3 15 mm 4 6x size 2 2x 1 ...
Page 54: ...page 54 of 72 4 5 6 20696264 Clean ...
Page 55: ...page 55 of 72 Replacing the diaphragm 7 8 9 1 2 ...
Page 56: ...page 56 of 72 3 10 11 12 Pay attention to number of washers ...
Page 57: ...page 57 of 72 13 14 15 1 2 Pay attention to number of washers ...
Page 58: ...page 58 of 72 Replacing the valves and assembling the pump heads 16 17 18 4x ...
Page 60: ...page 60 of 72 22 23 16 15 24 1 2 Maintain all pump heads in the same way 15 16 mm size 2 2x ...