9.1 Supply voltage connector - mains voltage
WARNING!
Unexpected startup is possible
As soon as the pump is connected to the mains, the pump
may start pumping and consequently feed chemical may
escape.
– Prevent dangerous feed chemicals from escaping.
–
If you have not successfully prevented this, immediately
press the
[STOP/START]
key or disconnect the pump
from mains, e.g. via an emergency cu-off switch.
CAUTION!
If the pump is integrated into a system: Design the system so
that potential hazardous situations are avoided by pumps
starting up automatically subsequent to unintended power
interruptions.
Connect the pump to the mains/power supply using the mains cable.
9.2 Description of the Terminals
9.2.1 "External control" Terminal
The "external control" terminal is a 5-pole panel terminal. It is compatible
with 2- and 4-pole cables.
Only use a 5-pole cable with the "Auxiliary capacity" / "Auxiliary frequency"
and "mA-input" functions.
Electrical interface for pin 1 "Pause" - pin 2 "External contact" - pin 5 "Aux‐
iliary capacity / Auxiliary frequency"
Data Value Unit
Voltage with open contacts 5 V
Input resistance 10 kΩ
Max. pulse frequency 25 pulse/s
Min. pulse duration 20 ms
Control via:
n potential-free contact (load: 0.5 mA at 5 V) or
n Semiconductor switch (residual voltage < 0.7 V)
Electrical interface for pin 3 "mA input" (with identity code characteristic
"Control version": 2 and 3)
1
Data Value Unit
Input apparent ohmic resistance, approx. 120 Ω
1
The metering pump makes its first metering stroke at approx. 0.4 mA (4.4
mA) and reaches maximum frequency at approx. 19.6 mA.
Fig. 14: Pump assignment
Installation, Electrical
35
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