Grundfos CRE User Manual

8.8 "Digital inputs/outputs"
Pump variant
"Digital inputs/
outputs"
CME ●
CRE, CRIE, CRNE, CRKE, SPKE, MTRE ●
Available inputs/outputs depend on the functional module fitted in
the pump:
Function (terminal)
FM 200
1)
(standard)
FM 300
1)
(advanced)
"Digital input/output 3, setup"
(6 and 10)
● ●
"Digital input/output 4, setup"
(11 and 18)
- ●
1)
See the section on the identification of functional module.
You can select if the interface is to be used as input or output. The
output is an open collector and you can connect it to e.g. an
external relay or controller such as a PLC.
+ 24V
DO 3/4
1
TM064463
Example of configurable digital inputs/outputs
Pos. Description
1 External controller
To set a digital input/output, make the settings below.
Mode
You can set the digital input/output 3 and 4 to act as digital input or
digital output:
• "Digital input"
• "Digital output".
Function
You can set the digital input/output 3 and 4 to the functions stated in
the table below:
Possible functions, digital input/output 3
"Function if input"
(See details in the section on
digital inputs)
"Function if output"
(See details in the section on
relay outputs)
"Not active"
"External stop"
"Min."
"Max."
"External fault"
"Alarm resetting"
"Dry running"
"Accumulated flow"
"Predefined setpoint digit 2"
"Not active"
"Ready"
"Alarm"
"Operation"
"Pump running"
"Warning"
"Limit 1 exceeded"
"Limit 2 exceeded"
Possible functions, digital input/output 4
"Function if input"
(See details in the section on
digital inputs)
"Function if output"
(See details in the section on
relay outputs)
"Not active"
"External stop"
"Min."
"Max."
"External fault"
"Alarm resetting"
"Dry running"
"Accumulated flow"
"Predefined setpoint digit 3
"Not active"
"Ready"
"Alarm"
"Operation"
"Pump running"
"Warning"
"Limit 1 exceeded"
"Limit 2 exceeded"
Activation delay (only for input)
Select the activation delay (T1).
It is the time between the digital signal and the activation of the
selected function.
Range: 0-6000 seconds.
Duration timer mode (only for input)
Select the duration timer mode. See the figure below.
• "Not active"
• active with interrupt (mode A)
• active without interrupt (mode B)
• active with after-run (mode C).
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.
TI
TI > T1 + T2
TI < T1 + T2
T1 T2
T1 T2
T1 T1 T2T2
T1
T1
TI
T2
DI
A
B
C
TM081288
Duration timer function of digital inputs
Pos. Description
TI T input
DI Digital input
A, B, C Modes
Factory setting
See the section on factory settings.
Related information
3.2.2 Identification of functional module
8.7 "Digital inputs"
8.9 "Signal relays" 1 and 2 ("Relay outputs")
9.2 Factory settings
41
English (US)

Grundfos CRE Specifications

General

Protection Class	IP55
Material	Stainless Steel
Applications	Water supply, pressure boosting, irrigation
Impeller Material	Stainless Steel
Pump Housing Material	Stainless Steel
Connection Size	DN32 to DN200 (depending on model)
Power Supply	3-phase
Control	Integrated frequency converter