Digital Inputs - Grundfos TPE2 Installation And Operating Instructions Manual

Measured parameter
Select one of the parameters, such as the parameter
to be measured in the system by the Pt100/1000
sensor connected to the actual Pt100/1000 input.
1
TT
Overview of Pt100/1000 sensor locations
Parameter
Liquid temp.
Temperature 1
Temperature 2
Ambient temp.
Measuring range
-50 to +204 °C.
Factory setting
See section Factory settings.
Related information
9.5.1 Connection terminals, advanced functional
module, FM 300
17.19 External setpoint function
17.46 Assisted pump setup
17.47 Setup, analog input
35. Factory settings

17.13 Digital inputs

Pump variant
TPE3, TPE3 D
TPE2, TPE2 D
Function
Digital input 1, setup
Digital input 2, setup
4) See section Connection terminals, advanced functional
module, FM 300.
To set a digital input, make the settings below.
2
TT
4 3
DTT
TT
Pos.
1
2
3
Not shown
Digital inputs
●
●
4)
Terminal
2 and 6
1 and 9
Function
Select one of these functions:
• Not active
When set to Not active, the input has no function.
• External stop
When the input is deactivated, open circuit, the
pump stops.
• Min. (minimum speed)
When the input is activated, the pump runs at the
set minimum speed.
• Max. (maximum speed)
When the input is activated, the pump runs at the
set maximum speed.
• "User-defined speed"
When the input is activated, the motor runs at a
speed set by the user.
• External fault
When the input is activated, a timer starts. If the
input is activated for more than 5 seconds, the
pump stops and a fault is indicated. This function
depends on input from external equipment.
• Alarm resetting
When the input is activated, a possible fault
indication is reset.
• Dry running
When this function has been selected, lack of inlet
pressure or water shortage can be detected.
When lack of inlet pressure or water shortage, dry
running, is detected, the pump stops. The pump
cannot restart as long as the input is activated.
This requires the use of an accessory, such as
these:
- a pressure switch installed on the inlet side of
the pump
- a float switch installed on the inlet side of the
pump.
• Accumulated flow
When this function has been selected, the
accumulated flow can be registered. This requires
the use of a flowmeter which can give a feedback
signal as a pulse per defined flow of water. See
section "Pulse flowmeter setup".
• Predefined setpoint digit 1, applies only to
digital input 2
When digital inputs are set to a predefined
setpoint, the pump operates according to a
setpoint based on the combination of the
activated digital inputs. See section "Predefined
setpoints".
• Activate output
When the input is activated, the related digital
output is activated. See section Digital inputs/
outputs. This is done without any changes to
pump operation.
• Local motor stop
55