5 relay output – IMP Pumps NMTC module User Manual
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20
RUN
voltage
MAX
voltage Function
<2V
0..10V
Pump stopped.
>3V
0..10V
H
max
/ n
max
U[V]
H
min
/ n
min
Off
H [m] /
n[RPM]
10
H
min
= 15% H
max
n
min
= 25% n
max
0.5
Figure 4: External 0..10V transfer curve for Mode 2
5 Relay output
Terminal
designation Terminal description
MODE
Mode selection rotary switch. Used to show and configure mode of operation for relay.
LED1 / LINK Slowly blinking when module is powered, permanently lid when link established
LED2 / ACT Flashing yellow when data reception detected. Combined (OR) with Modbus data
reception indication
NC
Normally closed relay contact. Opens when relay is active.
C
Relay common contact.
NO / OK
Normally open relay contact. Closes when relay is active.
The module contains one status relay, used to signal pump operation or malfunction. See table below
for functionality.
7
When mode Mode 6 or Mode 7 is selected, LED1 and LED2 will show relay configuration. See section “4.3
LED is on
LED is off
Relay
configuration
Output
status
Description
Relay
position
LED status
LED 1 LED 2