Danfoss VLT HVAC Drive 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 compartment/control card
System
start/
stop
From motor control circuitry
System
safety
interlock
Pressure
transmitter
4-20 mA,
L1
L2
L3
Ground
N
e30bu098.10
P
24 V DC
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
XD2.
21
XD2.
22
XD2.
23
XD2.
24
XD2.
25
XD2.
26
XD2.
10
XD2.
11
XD2.
12
XD2.
13
XD2.
14
XD2.
15
XD2.
16
XD2.
17
XD2.
18
XD2.
4
XD2.
5
XD2.
6
XD2.
7
XD2.
8
XD2.
9
MMM
Illustration 69: Cascade Controller Wiring Diagram
8.1.13 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 70: Fixed Variable Speed Pump Wiring Diagram
AQ262141314214en-000301 / 130R0880 | 129Danfoss A/S © 2021.11
Wiring Configuration Examples
VLT® HVAC Drive FC 102
Operating Guide