Application and function of the analogue inputs AI1 and AI2
Analogue inputs can be used for setpoint input or actual value input. The allocation of setpoint and actual value specifications is freely configurable.
The type of use (setpoint sensor, differential pressure sensor, external sensor, etc.), the signal type (0 to 10 V, 0 to 20 mA, etc.) and the corresponding signal/value assignments are set via the menus “Function of analogue input AI1” and “Function analogue input AI2”. In addition, information about the current settings can be queried.
The analogue input is pre-defined for the required signal depending on the selected control mode of the pump.
In the “Settings” menu 
, select
- “External interfaces”
- “Function analogue input AI1” or “Function analogue input AI2” in sequence.
After selecting one of the options “Analogue input (AI1) function” or “Analogue input (AI2) function”, select the following query or setting:
Setting | Function control input AI1 or AI2 |
|---|---|
Overview of the analogue input | Overview of settings of this analogue input, for example: • Type of use: Temperature sensor • Signal type: PT1000 |
Set analogue input | Adjustment of type of use, signal type and corresponding signal/value assignment |
Information about the current settings can be retrieved in “Overview of the analogue input”.
The type of use, signal type and signal/values assignment are defined in “Set analogue input”.
Type of use | Function |
|---|---|
Not configured | This analogue input is not used. No settings required |
Setpoint sensor | Use analogue input as setpoint sensor. For example, delivery head. |
Differential pressure sensor | Use analogue input as actual value input for differential pressure sensor. For example, index circuit evaluator. |
Temperature sensor | Use analogue input as actual value input for temperature sensor. For example for control mode T-const |
External sensor | Use analogue input as actual value input for PID control. |
The following signal types are available depending on the type of use:
Type of use | Signal type |
|---|---|
Setpoint sensor | • 0 – 10 V, 2 – 10 V • 0 to 20 mA, 4 to 20 mA |
Differential pressure sensor | • 0 – 10 V, 2 – 10 V • 0 to 20 mA, 4 to 20 mA |
Temperature sensor | • PT1000 • 0 – 10 V, 2 – 10 V • 0 to 20 mA, 4 to 20 mA |
External sensor | • 0 – 10 V, 2 – 10 V • 0 to 20 mA, 4 to 20 mA |
Example setpoint sensor
The following signal types are available for the type of use “Setpoint sensor”:
Setpoint sensor signal types:
0 ... 10 V: voltage range of 0 ... 10 V for transfer of setpoints.
2 ... 10 V: voltage range of 2 ... 10 V for transfer of setpoints. Cable break is detected for a voltage below 2 V.
0 ... 20 mA: electric current range of 0 ... 20 mA for transfer of setpoints.
4 ... 20 mA: electric current range of 4 ... 20 mA for transfer of setpoints. Cable break is detected for a electric current below 4 mA.
NOTICE
The substitute setpoint is adjusted in the event of cable break detection.
For the signal types “0 ... 10 V” and “0 ... 20 mA”, a cable break detection with a parameterisable threshold can be optionally activated (see setpoint sensor configuration).