Level Switch" Terminal; Relay; Relay Functions - ProMinent Beta b BT4b Series Operating Instructions Manual

"External contact" operating mode
"External Analogue" operating mode
"Auxiliary frequency" operating mode

9.3.2 "Level switch" terminal

1
P_BE_0016_SW
Fig. 11: Pump assignment
3
2
P_BE_0017_SW
Fig. 12: Cable assignment

9.4 Relay

9.4.1 Relay functions

Tab. 2: Beta b BT4b/BT5b
Identity code Description
0 no relay
1 Fault indicating
relay
The pump works if:
the cable is connected and pin 1 and pin 4 are connected.
n
no cable is connected.
n
The pump performs one or more strokes if:
Pin 2 and pin 4 are connected to each other for at least 20 ms. At the
n
same time, pin 1 and pin 4 must also be connected to each other.
The metering pump makes its first metering stroke at approx. 0.1 mA
n
(4.1 mA) and enters into continuous operation at approx. 19.9 mA.
The pump works at a pre-set stroke rate if:
Pin 5 and pin 4 are connected to each other. At the same time, pin 1
n
and pin 4 must also be connected to each other. The auxiliary fre‐
quency is factory-preset to the maximum stroke rate.
There is a connecting option for a 2-stage level switch with pre-warning
and limit stop.
Electrical interface
Data
3
Voltage with open contacts
Input resistance
Control via:
2
potential-free contact (load: 0.5 mA at 5 V) or
n
Semiconductor switch (residual voltage < 0.7 V)
n
Pin
1
2
3
1
Type
-
NC changeover
contact
Function
Earth GND
Minimum pre-warning
Minimum limit stop
Maximum voltage Maximum cur‐
rent
-
230 V 8 A
Electrical installation
Value Unit
5 V
10 kΩ
3-wire cable
black
blue
brown
Behaviour of relay
type when retrofit‐
ting, as standard
- -
X
31