Digital Inputs/Outputs - Grundfos CRE Series Installation And Operating Instructions Manual

• Active with interrupt
• Active without interrupt
• Active with after-run.
The duration time (T2) is the time which, together with
the mode, determines how long the selected function
is active.
Range: 0 - 15,000 seconds.
T3 > T1 + T2
1
T3
2
T1 T2
3
T1 T2
4
T1 T2
Pos. Description
1 Digital input.
2 Active with interrupt.
3 Active without interrupt.
4 Active with after-run.
T1 Activation delay.
T2 Duration time.
The period of time when the digital
T3
input is activated.

9.13 Digital inputs/outputs

The inputs and outputs available depend on the
functional module fitted in the motor.
Digital input/
output 3
Functional
module
(Terminals DI3,
GND)
FM110 •
FM310 •
FM311 •
You can select whether the interface is to be used as
an input or output. The output is an open collector.
You can connect the open collector to, for example,
an external relay or a controller such as a PLC.
Wiring example:
T3 < T1 + T2
T3
T1
T1 T2
Digital output, open collector
T1 T2
Mode
You can set the digital input or output 3 and 4 to act
as a digital input or digital output.
Functions if the digital input or output is set to
input:
•
•
•
•
•
•
•
•
•
Digital input/
•
output 4
•
(Terminals DI4,
•
GND)
•
-
•
•
Functions if the digital input or output is set to
•
output:
•
•
•
•
•
•
•
DI3 24V AI2 5V
1
Pos. Description
1 External controller
Not active
Ext. stop
Min.
Max.
User defined speed
External fault
Alarm resetting
Dry running
Accumulated flow
Reverse rotation
Predefined setpoint 2 (digital input/output 3)
Predefined setpoint 3 (digital input/output 4)
Local motor stop
Activate output
Not active
Ready
Alarm
Operation
Pump running
Warning
Limit 1 exceeded
TX RX
59