Digital Inputs/Outputs; Signal Relays" 1 And - Grundfos CRE Notice D'installation Et De Fonctionnement

7.8 "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)
* See section 5.2.1 Identification of functional
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
Fig. 56 Example of configurable digital inputs/outputs
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 section
Digital inputs"
7.7 " )
• "Not active"
• "External stop"
• "Min."
• "Max."
• "External fault"
• "Alarm resetting"
• "Dry running"
• "Accumulated flow"
• "Predefined setpoint digit
2"

"Digital inputs/outputs"

●
●
FM 200* FM 300*
(standard) (advanced)
● ●
- ●
module.
External
controller
"Function if output"
(See details in section

7.9 "Signal relays" 1 and 2

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 section
Digital inputs"
7.7 " )
• "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 fig. 55.
"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.
T input > T1 + T2
T input > T1 + T2
Digital
input
T input
Mode A
T1 T2
Mode B
T1 T2
Mode C
T1
Fig. 57 Duration timer function of digital inputs
Factory setting
See section 10. Technical data.
"Function if output"
(See details in section
7.9 "Signal relays" 1 and 2
Relay outputs"
(" ))
• "Not active"
• "Ready"
• "Alarm"
• "Operation"
• "Pump running"
• "Warning"
• "Limit 1 exceeded"
• "Limit 2 exceeded"
T input < T1 + T2
T input < T1 + T2
T input
T1
T1 T2
T2 T1 T2
41