Tab. 3: Control via:
Switching element Specification
potential-free contact Load: 0.5 mA at 5 V
Semiconductor switch Residual voltage < 2 V
Parameter Value
Max. pulse frequency 50 pulses/s
Min. pulse duration 10 ms
Tab. 4
Switching element Specification
NPN output (Open Drain) 30 V max. voltage and 300 mA
max. current load per pin
CAUTION!
No protection provided for inductive loads.
– Provide a free-running diode when controlling a
delay.
9.2.2 "External control" terminal
The "external control" terminal is a 5-pole panel terminal. It is compatible
with 2- and 4-pin cables.
Only use a 5-pin cable with the "Auxiliary capacity" and "mA input" func‐
tions.
Electrical interface for pin 1 "Pause" - pin 2 "External contact" - pin 5 "Aux‐
iliary capacity"
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 load, approx. 120 Ω
1
The metering pump starts running at approx. 0.4 mA (4.4 mA) and rea‐
ches maximum capacity at approx. 19.6 mA.
Configured as an output
Fig. 12: Assignment on pump
Installation, electrical
32
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