Danfoss vlt FC 102 - Wiring Configuration for a Fixed Variable Speed Pump

Power card
Motor Mains
Relay 1
(cascade
pump 1)
Relay 2
(cascade
pump 2)
+24 V OUT + 24 V OUT
(Start)
(Safety interlock)
(Feedback 1 res.)
Control card
System
start/
stop
From motor control circuitry
System
safety
interlock
Pressure
transmitter
4-20 mA,
L1
L2
L3
Ground
N
e30ba378.10
P
24 V DC
12 13 18 19 27 29 32 33 20 39 42 50 53 54 55
COM D IN D IN 1 D IN1 D IN1/D OUT D IN1/D OUT D IN 1 D IN 1 A IN2 A OUT1 COM A OUT + 10 V OUT A IN1 COM A IN
96
U
97
V
98
W
PE
91
L1
92
L2
93
L3
01 02 03 04 05 06
MMM
Illustration 27: Cascade Controller Wiring Diagram
6.1.13 Wiring Configuration for a Fixed Variable Speed Pump
L1/L2/L3
L1/L2/L3 L1/L2/L3
Relay 1
Relay 2
e30ba376.10
Drive
Illustration 28: Fixed Variable Speed Pump Wiring Diagram
AQ267037536117en-000101 / 130R0083 | 61Danfoss A/S © 2023.09
Basic I/O Configuration
VLT HVAC Drive FC 102
Operating Guide