User Manual M3000® Automation System / MSC II (Moog Servo ...

7 Networking M3000 ® Modules Profibus
7.3.4.3 Cable Lengths
Transmission Rate Maximum Cable Length
12,000 kBit/s 100 m (109 yd)
6,000 kBit/s 100 m (109 yd)
3,000 kBit/s 100 m (109 yd)
1,500 kBit/s 200 m (219 yd)
500 kBit/s 400 m (437 yd)
187.5 kBit/s 1,000 m (1,094 yd)
93.75 kBit/s 1,200 m (1,312 yd)
45.45 kBit/s 1,200 m (1,312 yd)
19.2 kBit/s 1,200 m (1,312 yd)
9.6 kBit/s 1,200 m (1,312 yd)
Table 5: Maximum Cable Lengths in Profibus Networks (Depending on the Transmission Rate)
The guiding values in table 5 are valid only for Profibus networks that
were established in compliance with the requirements in "7.3.3.1-Wiring"
on page 50.
Transmission Rate Maximum Stub Cable Length
12,000 kBit/s no stub cable allowed
1,500 kBit/s < 1.5 m
500 kBit/s < 6.6 m
Table 6: Maximum Permissible Stub Cable Length in Profibus Networks (Depending on the
Transmission Rate)
7.3.4.4 Suitable Cables
Parameters Cable Type A
Loop resistance at 3-20 MHz 135-165 Ω (150 Ω ±10 %)
Capacity 0.64 mm
Wire Cross Section > 0.34 mm²
Table 7: Suitable Cables for Profibus Interface Cables
The selection of a suitable cable also depends on site conditions (towing application,
environmental considerations, etc.)
Maximum Cable Lengths
in Profibus Networks
Permissible Stub Cable
Lengths in Profibus
Networks
Suitable Cables for
Profibus Interface Cables
© Moog GmbH User Manual M3000 ® and MSC II (CA65865-001; Version 1.1, 08/08) 53