Topology

• A bus segment may consist of a maximum of 32 devices (including the repeaters).
• The maximum cable length of a segment depends on the data transfer rate in use and on the quality of the bus cables being used.
• No more than 9 repeaters may be installed between two devices.
• Stubs are to be avoided, and are not permitted above 1.5 Mbit/s.
• The maximum number of devices is 125
• Interrupting the supply voltages from cable ends by switching off the repeater/slave, or by pulling out the plug, is not permitted.