Pr
o
Minent
®
Page 11
Assembly and Installation
Connecting two gamma/ L pumps in series
Connect two gamma/ L pumps in series as follows if you wish to control both via an electrical
signal in the “analogue” operating mode (see section 7.4.2):
blue
brown
black
blue
brown
black
gray
white
gray
white
+ power source –
Fig. 10
“Float switch” terminal
Optional fitting of a 2-stage float switch with prior warning and limit switch capacity.
gamma/ L configuration
3
2
1
Electrical interface:
•
Voltage when contacts open:
approx. +5 V
•
Input resistance:
10 k
W
•
Controller:
voltage free contact (load: 0.5 mA at + 5V),
or:
semiconductor switch (residual voltage < 0.7 V)
Fig. 11
Plug configuration
3
1
2
Function
3 core cable
Pin 1
Earth
black
Pin 2
Minimum prior warning
blue
Pin 3
Minimum limit switch
brown
Fig. 12
“
Dosing monitor” terminal
Optional connection of dosing monitor.
gamma/ L configuration
1
4
2
3
Electrical interface:
•
Voltage when contacts open:
approx. +5 V
•
Input resistance:
10 k
W
•
Controller:
voltage free contact (load: 0.5 mA at + 5V)
Fig. 13
Plug configuration
1
4
2
3
Function
4 core cable
Pin 1
Power supply (5V)
brown
Pin 2
Encoding
white
Pin 3
Response
blue
Pin 4
Earth
black
Fig. 14
