Active Terminator for PROFIBUS network / segment
Stable termination of PROFIBUS DP networks
T1 Active PROFIBUS Terminator
The T1 active terminator terminates the end of a PROFIBUS DP segment independently of the power supply of the final station. The last device can therefore be switched off, disconnected or replaced without removing the correct bus termination. The integrated DB9 port also creates an easily accessible measuring point for diagnostics.
- Independent active termination
- Two redundant power inputs
- DB9 measuring and service port
- Speeds from 9.6 kbit/s to 12 Mbit/s
- DIN-rail mounting
How does active termination work and when is it useful?
Difference between connector termination and an active terminator
Termination in the station connector
At the end of most segments, the resistor in the PROFIBUS connector of the final station is switched on. Correct termination, however, depends on that station remaining powered.
- simple and low-cost solution,
- suitable for permanently powered end stations,
- termination may stop working after the station is switched off,
- disconnecting the device can disrupt the complete segment.
Separate T1 active terminator
The T1 has its own power supply and is installed as a separate component at the physical end of the segment. Termination is therefore independent of the final station.
- stable termination even when the station is switched off,
- allows replacement of the final device,
- redundant power supply for greater availability,
- separate DB9 diagnostic port.
The T1 is installed at the actual physical end of the PROFIBUS DP cable segment and the A and B conductors and shield are connected.
The terminator is powered by its own 24 V DC supply. The second input can be used for redundant power.
Correct electrical termination remains in place regardless of the state of the final PROFIBUS station.
When do we recommend active termination?
Main features of the T1 active terminator
A ProfiTrace 2 tester, for example, can be connected to the integrated port. The technician can measure communication and signal quality directly at the physical end of the segment.
Depending on the installation, the DB9 connector can also be used as the main PROFIBUS cable connection. Removable screw terminals are the second option.
The T1 removes the dependency of termination on the final station, but its own power supply must be reliable. For important networks, we therefore recommend using both power inputs from independent circuits or a suitably backed-up 24 V supply.
Send us a simple network diagram, transmission speed, the positions of the first and final devices and information about which stations are switched off. We will assess the current termination and recommend a suitable location for the T1.
T1 Active PROFIBUS DP terminator
252,89 EUR incl. VAT
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