Terminal number Terminal description Parameter number Factory default
1+2+3 Terminal 1+2+3-Relay1 5-40 No operation
4+5+6 Terminal 4+5+6-Relay2 5-40 No operation
12 Terminal 12 Supply - +24 V DC
13 Terminal 13 Supply - +24 V DC
18 Terminal 18 Digital Input 5-10 Start
19 Terminal 19 Digital Input 5-11 No operation
20 Terminal 20 - Common
27 Terminal 27 Digital Input/Output 5-12/5-30 Coast inverse
29 Terminal 29 Digital Input/Output 5-13/5-31 Jog
32 Terminal 32 Digital Input 5-14 No operation
33 Terminal 33 Digital Input 5-15 No operation
37 Terminal 37 Digital Input - Safe Stop
42 Terminal 42 Analog Output 6-50 Speed 0-HighLim
53 Terminal 53 Analog Input 3-15/6-1*/20-0* Reference
54 Terminal 54 Analog Input 3-15/6-2*/20-0* Feedback
Table 4.2: Terminal connections
Very long control cables and analog signals may, in rare cases and depending on the installation, result in 50/60 Hz ground loops due to noise from line
power supply cables.
If this occurs, break the shield or insert a 100 nF capacitor between shield and chassis.
NOTE!
The common of digital / analog inputs and outputs should be connected to separate common terminals 20, 39, and 55. This will prevent
ground current interference among groups. For example, it prevents switching on digital inputs from disturbing analog inputs.
NOTE!
To comply with EMC emission specifications, shielded/armored cables are recommended. If an unshielded/unarmored cable is used,
see section
Power and Control Wiring for Unshielded Cables
.. For more information, see
EMC Test Results
in the Design Guide.
4.1.4 Fuses
Branch Circuit Protection
In order to protect the installation against electrical and fire hazard, all branch circuits in an installation, switch gear, machines, etc., must be short-circuit
and overcurrent protected according to the national/international regulations.
Short-circuit protection:
The adjustable frequency drive must be protected against short-circuit to avoid electrical or fire hazard. Danfoss recommends using
the fuses mentioned below to protect service personnel and equipment in case of an internal failure in the drive. The adjustable
frequency drive provides full short-circuit protection in case of a short-circuit on the motor output.
4 Electrical Installation VLT
®
HVAC Drive Instruction Manual
4-4
MG.11.AB.22 - VLT
®
is a registered Danfoss trademark
4
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