Siemens SIMATIC NET PROFIBUS manual What is a Profibus Terminator?, Order number

Active Components for RS-485 Networks

5.7PROFIBUS Terminator

What is a PROFIBUS Terminator?

The PROFIBUS terminator provides active termination for the bus. The major advantage of this is that bus nodes can be turned off, removed, or replaced without impairing data transfer. This applies in particular to the nodes at both ends of the LAN cable on which the terminating resistors would have to be activated and supplied with power. The PROFIBUS terminator can be installed on a standard rail.

Order number

6ES7 972-0DA00-0AA0

Design of the PROFIBUS Terminator

Table 5-4 shows the design of the PROFIBUS terminator:

Table 5-4 Design of the PROFIBUS Terminator

Design of the PROFIBUS Terminator	No.		Function
SIEMENS	À	LED 24 V power supply
PROFIBUS
	Á	Connection for power supply 24 V DC
TERMINATOR

1DC

	24 V		Â	PROFIBUS attachment
2	L+ M PE	A1 B1	3
			Ã Shield clamp grounding the braid shield and for
			4	strain relief of the LAN cable
6
			Ä	Ground screw

6ES7 972-0DA00-0AA0

ÅCable clamp for strain relief of the power supply cable

5

PROFIBUS Networks SIMATIC NET	5-15
6GK1970-5CA20-0AA1 Release 2 05/2000