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

8.8 "Digital inputs/outputs"

Pump variant
CME
CRE, CRIE, CRNE, CRKE, SPKE, MTRE
Available inputs/outputs depend on the functional module fitted in
the pump:
Function (terminal)
"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
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)
"Not active"
"External stop"
"Min."
"Max."
"External fault"
"Alarm resetting"
"Dry running"
"Accumulated flow"
"Predefined setpoint digit 2"
"Digital inputs/
outputs"
●
●
1) 1)
FM 200 FM 300
(standard) (advanced)
● ●
- ●
1
"Function if output"
(See details in the section on
relay outputs)
"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)
"Not active"
"External stop"
"Min."
"Max."
"External fault"
"Alarm resetting"
"Dry running"
"Accumulated flow"
"Predefined setpoint digit 3
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 > T1 + T2
DI
TI
A
T1 T2
B
T1 T2
C
T1 T2
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
"Function if output"
(See details in the section on
relay outputs)
"Not active"
"Ready"
"Alarm"
"Operation"
"Pump running"
"Warning"
"Limit 1 exceeded"
"Limit 2 exceeded"
TI < T1 + T2
TI
T1
T1 T2
T1 T2
41