Danfoss VLT AQUA Drive FC 202 Manuel d'installation - Page 11

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Danfoss VLT AQUA Drive FC 202 Manuel d'installation
Installation
ON
1 2
PROFIBUS Option A
MS
Code No. 130B1100
8 7 6 5 4 3 2 1
NS
SW. ver. XX.XX
ON
1
Termination switch
2
Address switches
Illustration 3.7 Location and Sequence of the Address Switches

3.7 Electrical Installation

3.7.1 Cabling Requirements
•
Terminate the nodes at the physical ends of each
segment. If the bus segment is branched, the
device furthest from the segment connector
represents the end of the segment.
•
Terminals 66 and 67 provide a 5 V DC supply,
available for external termination.
NOTICE
The PROFIBUS D-sub 9 adapter also features a
termination switch. When the D-sub 9 adapter is used,
set the termination switch on the fieldbus option to OFF,
to avoid double termination.
NOTICE
When the fieldbus is extended with a repeater, terminate
the extension at both ends.
NOTICE
To avoid impedance mismatch, use the same cable type
throughout the entire network. Refer to
chapter 3.7.2 Cable Specifications for cable specifications.
MG33C602
Installation Guide
1
ON
Termination
OFF
SN
SW
ON
OFF
Address
ON
2
Danfoss A/S © 07/2015 All rights reserved.
3.7.2 Cable Specifications
135–165 Ω
Impedance at a measuring
frequency from 3–20 MHz
<110 Ω/km
Resistance
Capacitance
<30 pF/m
Damping (total wire length)
Maximum 9 dB over the whole
wire length
Cross-section
Maximum 0.34 mm
Cable type
Twisted in pairs, 1 x 2, 2 x 2, or
1 x 4 wires
Screening
Copper-braided screen, or braided
screen and foil screen
Table 3.2 Cable Specifications
3
3
2
, AWG 22
9