Supply Voltages - Danfoss VLT 5000 Operating Instructions Manual

Terminal description
There are 4 terminal blocks, 2 with 10 poles and 2 with 8 poles. (See figure below)
MK3A Digital Inputs
I1 I2 I3 I4
MK3C Digital Outputs
O1 O2 O3 O4

Supply voltages

The option card is supplied by the internal 24 V DC supply of VLT 5000, but as the available power is
limited it can be necessary to use an external 24 V DC supply.
The 24 V DC supply of VLT 5000 can supply a total of 420 mA including the load on the control card
(terminal 12, 13 and output 42 and 45).
The 5 V output on the option card is generated from the 24 V supply. The maximum power on the 5 V
side is 5 V * 280 mA = 1.4 W, this corresponds to app. 60 mA on the 24 V side.
When an external 24 V DC voltage source is used the internal 24 V supply from the control card must
be disconnected, this is done by opening switch 1.1 and 1.2
Each digital input on the option card takes 8 mA. Each digital output on the option card can supply up
to 0.7 A (external 24V-supply) depending on the load. The load from the 24 V supply (internal or
external) can be calculated as follows:
8 mA * number of digital inputs
+
Load on digital outputs
(mk3 C, O1 – O8)
+
load on 5 V supply
(mk3 B/D, 5 V/com)
+
Load on control card
(24 V supply, terminal 12/13 and
outputs, terminal 42/45)
8
Synchronizing controller
I5 I6 I7 I8 24V
O5 O6 O7 O8 24V
MK3B Master / Virtual Master
COM 5V COM A1
MK3D Feedback
COM 5V COM A2
MG.10.N4.02 - VLT is a registered Danfoss trademark
A1 B1 B1 Z1 Z1
A2 B2 Z2
B2 Z2