Danfoss VLT series - Cascade Control Connection

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