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DeviceNet add-on module
3.5 Electrical connection
3.6 EMC precautions
3. Installation
N
L
91
CAN_L
92
CAN_H
V-
93
V+
94
PE
Term ination: Connecting a resistor of 121Ohm 0.25W over 91,92 will term inate the
DeviceNet Bus. This m ust be done if the device is the last on the Bus.
The following EMC precautions are recommended to obtain an interference free operation of
the Devicenet network. Additional information on EMC can be found in the MAG 6000/MASS
6000 handbooks.
Note
Relevant national and local regulations, for example regarding protective earth connection,
must be observed.
The DeviceNet communication cable must be kept away from cables that can contain electrical
noise such as motor and mains cables to avoid coupling of noise from one cable to the other.
Normally a distance of 200 mm (8 inches) is sufficient, but it is generally recommended to keep
the longest possible distance between the cables, especially where cables are running in
parrallel over long distances.
The use of separate cable trays for signal cables and high power cables has proven to be a very
good practice for eliminating noise coupling.
If the DeviceNet has to cross a main cable or other cables that are a source of noise, they must
cross eachother at an angle of 90°.
SFIDK.PS.023.C2.02
Signal converter
Transmitter
N
1+
11 - 30 V d.c.
115 -230 V a.c.
11 - 24 V a.c.
2-
L
Blue
W hite
Black
Red
+
Supply voltage
−
DeviceNet Cable
7
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