Grundfos CRNE - Page 20

The 250V contacts of the alarm relays of
these devices must not be connected
directly to the mains supply, but energized
by an isolated power supply or transformer
with galvanic isolation.
NC
C1
NO
DI3
24V
AI2
5V
TX RX
OFF ON
A
Y B
AI1
DI1
24V
5V
S24 ST1 ST2
TM082861
Terminal Type Function
NC Normally closed contact
Signal relay 1: LIVE or SELVC1 Common
NO Normally open contact
GND GND Signal ground
DI3 DI3/OC1
Digital input/output, configurable
Open collector: Maximum 24 V resistive or inductive
24V +24 V Power supply
AI2 AI2
Analog input:
• 0-20 mA or 4-20 mA
• 0.5 - 3.5 V, 0-5 V or 0-10 V.
5V +5 V Power supply to a potentiometer or sensor
GND GND Signal ground
TX GDS TX Grundfos Digital Sensor output
RX GDS RX Grundfos Digital Sensor input
5V +5 V Power supply to a potentiometer or sensor
A GENIbus, A GENIbus, A (+) / Modbus, D1 (+)
20
English (GB)