Wiring Configuration For Cascade Controller - Danfoss VLT HVAC Drive FC 102 Design Manual

Application Examples

12.9 Wiring Configuration for Cascade Controller

Illustration 12.4 shows an example with the built-in basic cascade controller with 1 variable-speed pump (lead) and 2 fixed-
speed pumps, a 4–20 mA transmitter, and system safety interlock.
Power Card
MOTOR MAINS
96 97 98 91 92 93
PE
U V W L1 L2 L3
L1
L2
L3
PE
M
Illustration 12.4 Cascade Controller Wiring Diagram
MG16C302
Design Guide
Control Card
01 02 03 04 05 06 12
From Motor Control Circuitry
N
M
Danfoss A/S © 11/2017 All rights reserved.
13 18 19 27 29 32 33
System System
Start/ Safety
Stop Interlock
M
20 39 42 50 53 54 55
Pressure
Transmitter
4-20 mA,
P
24 V dc
12 12
213