Danfoss VLT DeviceNet MCA 104 Installatiehandleiding - Pagina 11

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Installation
3.7.2 Wiring Procedures
Wiring Procedure for Enclosure Types A1-A3
1.
Mount the fieldbus connector on the fieldbus
option (terminal V-, CAN_L, Drain, CAN_H, V+).
For top cable entry, mount the supplied EMC
bracket on top of the frequency converter with 2
screws.
2.
Prepare the fieldbus cable by stripping a section
of the cable insulation, so that the cable screen
contacts the EMC bracket. Keep the unshielded
wire as short as possible. For cable specifications,
refer to chapter 3.7.1 Cable Specifications.
3.
Connect the fieldbus cable wires to the terminals
according to the colour code of the wires, see
Illustration 3.8.
4.
Position the stripped cable between the spring
loaded metal clamps, to establish mechanical
fixation and electrical contact between cable
screen and ground.
2
1
1 Cable screen
2 EMC bracket (Used for top cable entry only)
Illustration 3.7 Wiring for Enclosure Types A1-A3
MG33D502
Installation Guide
Pin no.
1
2
3
4
5
Illustration 3.8 Fieldbus Cable Terminal Connections
DeviceNet termination
Install the termination resistors at each end of the bus line.
Mount the resistor between terminal 2 (CAN_L) and
terminal 4 (CAN_H).
The resistors have the following specification: 121 Ohm, 1%
Metal film, 1/4 Watt
Illustration 3.9 Termination Resistor Mounted
Danfoss A/S © Rev. 03/2015 All rights reserved.
5
4
3
2
1
Terminal
Colour
V-
Black
CAN_L
Blue
Drain
(bare)
CAN_H
White
V+
Red
3
3
Name
GND
CAN LOW
Screen
CAN HIGH
+24 V
9