Danfoss VLT series Quick Guide

1.5.4 Cascade Control Connection
One Pump, One Relay Mode: when 25-57 Relays per
Pump=1
130BD159.10
FC 111
+24 V
D IN
D IN
D IN/OUT
COM
D IN/OUT
COM RS-485
P RS-485
N RS-485
+10 V
A IN
A IN
COM
A OUT/D OUT
12
18
19
20
27
29
61
68
69
50
53
54
55
42
A OUT/D OUT
45
1
2
3
4
5
6
Relay 2
Start
3# Pump
4# Pump
Pressure +
Pressure -
1# Pump
2# Pump
Relay 1
Illustration 1.19 One Pump, One Relay Mode
Every pump operation is controlled by one output.
1.
When 25-04 Pump Cycling=[0] Disable: maximum
5 pumps.
2.
When 25-04 Pump Cycling=[1] Enable: maximum 4
pumps.
3. 2 relays and 2 digital outputs are available.
One Pump, Two Relay Modes: when
25-57 Relays per
Pump=2
130BD160.10
FC 111
+24 V
D IN
D IN
D IN/OUT
COM
D IN/OUT
COM RS-485
P RS-485
N RS-485
+10 V
A IN
A IN
COM
A OUT/D OUT
12
18
19
20
27
29
61
68
69
50
53
54
55
42
A OUT/D OUT
45
1
2
3
4
5
6
Relay 2 Relay 1
Start
2# Pump_Main
2# Pump_Drive
Pressure +
Pressure -
1# Pump_Main
1# Pump_Drive
3# Pump_Drive
3# Pump_Main
Illustration 1.20 One Pump, Two Relay Modes
Every pump operation is controlled by two outputs.
1. Dedicated PLC not necessary as control
2.
When 25-04 Pump Cycling=[0] Disable: no pump.
3.
When 25-04 Pump Cycling=[1] Enable: maximum 3
pumps.
4. 2 relays, 2 digital outputs and 2 analog outputs
are available.
Quick Guide
VLT
®
HVAC Basic Drive Cascade Controller Quick Guide
24 MG18F402 - VLT
®
is a registered Danfoss trademark
11

Danfoss VLT series Specifications

General

Series	VLT
Category	DC Drives
Output Voltage	0-100% of input voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Overtemperature, Short Circuit, Ground Fault
Communication Interfaces	Profibus, CANopen
Enclosure Rating	IP20, IP21, IP55, IP66
Cooling Method	Forced Air Cooling, Convection Cooling
Control Mode	Sensorless Vector, Closed Loop Vector
Ambient Temperature	-10°C to +50°C (14°F to 122°F)