GE GFK-2193A user manual Network Connectors, Pin No Signal Designation

1

Participant Participant

Termination

Repeater

Connecting

Segments

Participant

Remote

Repeate

Link Segment (No Participants)

Participant Participant

Termination

Branch Segment

	Remote
Participant	Repeater

To additional participants

Figure 1-2. Repeaters and bus termination

Network Connectors

PROFIBUS connections are created with a 9 pin sub-D connector. A minimum connection consists of a shielded twisted-pair cable (shield to pin 1 and twisted-pair wires to pins 3 and 8) with terminating connections in the appropriate bus plugs. The pin to signal conventions are described below.

Pin-out Listing for the PROFIBUS Bus Plug Connector

Pin No.	Signal	Designation
1	Shield	Shield / Protective Ground
2	M24	Ground / Common of the 24V output voltage
3	RxD/TxD-P	Receive data / transmission data plus
4	CNTR-P	Control signal for repeaters (direction control)
5	DGND	Data transmission potential (ground to 5V)
6	VP	Supply voltage of the terminating resistance (+ 5V)
7	P24	Output voltage (+ 24V)
8	RxD/TxD-N	Receive data / transmission data negative
9	CNTR-N	Control signal for repeaters (direction control)

Note: For information on network segment length, network connectors and network termination, and network baud rate, refer to Chapter 2, “Installation.”

GFK-2121A Chapter 1 Overview and Specifications 1-5