Digital Inputs - Grundfos TPE 1000 Series Installation And Operating Instructions Manual

13.10 Digital inputs

Pump variant
TPE, TPED, NBE, NBGE,
NKE, NKGE
TPE, TPED, NBE, NKE
Series 2000
Function
Digital input 1, setup
Digital input 2, setup
*See section Connection terminals, advanced
functional module, FM 300.
To set a digital input, make the settings below.
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 is started. 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:
- a pressure switch installed on the inlet side of
the pump
- a float switch installed on the inlet side of the
pump.
• Accumulated flow
Digital inputs
●
•
●
Terminal*
The priority of the selected functions in relation to
2 and 6
each other appears from section Priority of settings. A
stop command always has the highest priority.
1 and 9
Activation delay
Select the activation delay, T1.
It is the time between the digital signal and the
activation of the selected function.
Range: 0 to 6000 seconds.
Duration timer mode
Select the mode.
•
•
•
•
Select the duration time, T2.
It is the time which, together with the mode,
determines how long the selected function is active.
Range: 0 to 15,000 seconds.
DI
A
B
C
Duration timer function of digital inputs
Pos.
A
B
C
DI
When this function has been selected, the
accumulated flow can be registered. This requires
the use of a flowmeter which gives 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
predefined setpoint, the pump operates according
to a setpoint based on the combination of the
activated digital inputs. See section "Predefined
setpoint".
Not active
active with interrupt, mode A
active without interrupt, mode B
active with after-run, mode C.
T input > T1 + T2
T input
T1 T2
T1 T2
T1 T2
Description
Mode C
Mode B
Mode A
Digital input
T input < T1 + T2
T input
T1
T1 T2
T1 T2
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