PS 1 – LCD
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6.7
External level sensor 4 – 20 mA
“4 - 20 mA Interface“
needs to be selected under “level control” in the menu. An external sensor
dual conductor system 4 – 20 mA may connected to terminals 34 (-) and 35 (+)
The sensor is supplied with a stabilized DC voltage of approximately 20 Volts. At delivery the
effective range of the level sensor is set so it matches the effective range of the internal
pressure sensor. If connecting a level sensor with a different effective range the according setting
needs to be changed in the menu (compare to 4.2). The output is active meaning the control unit
supplies the sensor with power.
If used in the Ex-zone according regulations need to be obeyed.
6.8 Analog Outlets
Analog outlets are supposed to be used for the connection to control systems.
Signals change proportionally to the level.
0 -10 V = Terminal 36 (+) and 37 (-) (load max. of 20 mA)
4 – 20 mA = Terminal 38 (+) and 39 (-) (resistance max. 250 Ohm)
The length for the cable used for analog outlets should not exceed 1.50m
6.9
Network-independent alarm:
(Only with the standard version)
This function is omitted with the optional versions with 2 sensors, motor circuit breaker or main
switch. With the use of a rechargeable battery a network-independent alarm signal can be sounded
in the event of a power failure. The alarm issued is a constant acoustic signal.
Ensure correct polarity when inserting the rechargeable battery!
In order to ensure faultless functionality, the rechargeable battery must be fully charged before
insertion, or charged for 24h in the switchgear.
Attention!
Never
use non-rechargeable batteries.
The following rechargeable batteries are approved for use:
Nickel-metal hydride rechargeable battery
(NiMH)
Nickel-cadmium rechargeable battery
(NiCd)
7.0 Trial phase without pump
7.1
In order to test the control unit without pumps the following needs to be considered
- It is sufficient to connect N1 and L1
- Unless the motor current protection is set to 0 A, the message “
L pump off”
will appear
- Terminals 21 / 22 need to be bridged, otherwise the message
“Thermal Fault 2”
will appear.
- Thermal fault 1 need to be deactivated in the settings menu, otherwise the message
“Thermal Fault 1”
will appear.
