Switches 1-4 - Danfoss VLT 4000 VT Instruction Manual

Electrical installation, control cables
Torque:
Screw size:
Generally speaking, control cables must be shielded/
armored and the shield must be connected by
means of a cable clamp at both ends to the metal
cabinet of the unit (see Grounding of shielded
(armoured control cables).
Normally, the shield must also be connected to the
body of the controlling unit (follow the instructions for
installation given for the unit in question).
If very long control cables are used, 50/60 Hz
ground loops may occur that will disturb the
whole system. This problem can be solved by
connecting one end of the shield to ground via a
100nF capacitor (keeping leads short).
Electrical installation,controlcables
Torque: 4.5 - 5 ln lb
Screw size: M3
See Grounding of shielded (armoured control cables
for correct termination of control cables.
No. Function
04, 05 Relay output 1 can be used for
indicating status and warnings.
MG.40.A7.22 - VLT is a registered Danfoss trademark
4.5 - 5 ln lb
M3.
VLT
12, 13 Voltage supply to digital inputs. For
the 24 V DC to be used for digital
inputs, switch 4 on the control card
must be closed, position "on".
16-33 Digital inputs. See parameters
300-307 Digital inputs.
20 Common for digital inputs.
39 Common for analog/digital outputs.
Must be connnected to terminal 55
by means of a three-wire transmitter.
See Examples of connection.
42, 45 Analog/digital outputs for indicating
frequency, reference, current and
torque. See parameters 319-322
Analoge/digital outputs.
50 Supply voltage to potentiometer and
thermistor 10 V DC.
53, 54 Analog voltage input, 0 - 10 V DC.
55 Common for analog voltage inputs.
60 Analog current input 0/4-20 mA. See
parameters 314-316 Terminal 60.
61 Termination of serial communication.
See Grounding of shielded
(armoured control cables .
This terminal is not normally to be
used.
68, 69 RS 485 interface, serial
communication. Where the
VLT AFD is connected to a bus,
switches 2 and 3 (switches 1- 4 -
see next page) must be closed on
the first and the last VLT AFD. On the
remaining VLT AFD, switches 2 and
3 must be open. The factory setting
is closed (position on).

Switches 1-4

The dipswitch is located on the control card. It is used
for serial communication and external DC supply.
The switching position shown is the factory setting.
®
4000 VT
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