9
Termination
The Profibus physical layer is based on RS-485, and therefore termination resistors are needed at both
ends of the network. The image below shows how to connect the terminators:
Ready-made terminators are available for easy installation.
Status Leds
The interface has two multi-color LED’s mounted inside the enclosure to indicate the status. To access
the LED’s, remove the front cap.
The left LED shows the status of the interface, the right LED shows the network status.
Status LED:
Status
Description
Flashing green/red
Initializing
Steady green
Device operational
Flashing red
Recoverable hardware failure
Steady red
Hardware failure – attention required
Network LED:
Status
LED
Network
LED