User`s manual

GFK-2334A Chapter 2 Installation 2-5
2
Network Termination
Termination resistors are needed, as defined in DIN 19245 Part 1 section 3.1.2.5.
Master Slave Slave Slave SlaveSlave
Termination Required
(Segment 1)
One terminator must be applied at each end of a network segment.
Master Slave Slave Slave SlaveSlave
Repeater
Termination Required
(Segment 1)
Term ination Required
(Segment 2)
Generally, termination is provided in commercially-available PROFIBUS standard network
connectors. Some connector vendors provide termination capability in the connector and
a switch on the connector to enable/disable termination. Some connector vendors provide
both terminated and unterminated connectors.
Note: For proper network termination, it is essential that the terminating devices
maintain power. Power is provided by the device on Pin 6 and Ground on Pin 5. If
power is lost to either terminating device, the network may not operate correctly.
Generally, the lone network master device is one of the terminating devices.
Therefore, a loss of power to the network master renders the network inoperable
anyway. The other terminating device may be a critical slave device that must
maintain power or a separately powered, stand-alone terminator. These stand-
alone devices are commercially available.