Siemens 6ES7972-0BB42-0XA0 SIMATIC PROFIBUS 35-Degree Screw Connector with PG Socket

Overview

SIEMENS SIMATIC PROFIBUS

6ES7972-0BB42-0XA0 SIMATIC PROFIBUS 35-Degree Screw Connector with PG Socket

A screw-terminal PROFIBUS connector with a 35° cable outlet, integrated switchable bus termination, cable strain relief and a separate programming-device socket.

At a Glance

Brand	Siemens
Model	6ES7972-0BB42-0XA0
Product Type	RS-485 bus connector
Core Function	Connecting an electrical bus station to the network cable
Application	PROFIBUS stations with a 9-pin D-sub interface

35° cable direction

The angled outlet routes the bus cable away from the device interface.

Screw-wire connection

Two PROFIBUS cable connections use screw terminals rather than FastConnect IDC.

PG access

The BB42 version includes the additional programming-device socket.

Product Overview

6ES7972-0BB42-0XA0 connects a PROFIBUS station to the electrical RS-485 bus through a 9-pin D-sub interface, with a 35° cable outlet and screw terminals for the bus conductors.

The connector provides two cable connections for line continuation, an integrated resistor combination selected by a slide switch and a PG socket for service access.

Ordering focus: Select the 35° version with PG access, prepare the shield and screw connections correctly, and set the terminating resistor for the connector’s position in the segment.

Key Functions

Wire the PROFIBUS pair into screw terminals

The green and red conductors are secured in the A and B terminal positions, with the cable shield making bare contact with the shield element.

Terminate the segment with an isolating slide switch

The integrated resistor is selected by the slide switch; the ON setting also disconnects the PROFIBUS continuation at that point.

Provide a dedicated programming-device connection

The BB42 housing includes the separate PG socket while retaining the station’s 9-pin D-sub bus interface.

Official Specifications

PROFIBUS DP Transfer Rate	9.6 kbit/s to 12 Mbit/s
Cable Connections	2 PROFIBUS cable connections
Station Connection	1 × 9-pin D-sub connector
Wire-Termination Method	Screw terminals; no FastConnect insulation-displacement contacts
Cable Outlet Angle	35°
Bus-Termination Design	Integrated resistor combination, switchable by slide switch
Additional Service Connection	PG socket
Enclosure and Locking	Plastic enclosure with screw locking
Dimensions (Width × Height × Depth)	15.8 × 54 × 39.5 mm
Net Weight	34 g
Operating Ambient Temperature	−25 to +60 °C
Storage and Transport Temperature	−40 to +70 °C
Degree of Protection	IP20
Cable Retention	Integrated strain relief
Silicone Content	Silicone-free

Official source:Siemens Connector Data Sheet · Siemens PROFIBUS Connector Manual

Frequently Asked Questions

Will 6ES7972-0BB42-0XA0 accept wires by the FastConnect IDC method?

This version uses screw terminals for the PROFIBUS conductors rather than FastConnect insulation-displacement contacts.

Which wire colors should I connect to A and B when assembling 6ES7972-0BB42-0XA0?

Use the recommended assignment of green to A and red to B.

Where must the shield be exposed inside 6ES7972-0BB42-0XA0?

The cable shield must be stripped bare where it rests on the connector’s contact element.

Why do stations further along the cable lose communication when I switch 6ES7972-0BB42-0XA0 to ON?

The ON setting disconnects the outgoing PROFIBUS path while connecting the terminating resistor.

Can I connect a programming device directly at 6ES7972-0BB42-0XA0?

The BB42 version includes a separate PG socket.

What enclosure space should I allow for the angled outlet of 6ES7972-0BB42-0XA0?

Allow for a 35° cable outlet and a connector body measuring 15.8 × 54 × 39.5 mm.

How do I secure the cable after wiring the terminals in 6ES7972-0BB42-0XA0?

Position the cable between the terminal blocks, tighten the conductor screws and close and secure the enclosure cover.

Compatibility & Ordering Notes

Before ordering 6ES7972-0BB42-0XA0: Keep the BB42 suffix for the 35° screw-terminal connector with PG socket and plan the shield contact, cable retention and segment-end resistor setting.

Compatibility Checklist for 6ES7972-0BB42-0XA0

• Connect to a compatible electrical 9-pin D-sub PROFIBUS interface.
• Use the screw-terminal assembly method and the recommended A-green and B-red conductor assignment.
• Expose the cable shield at the designated contact element.
• Allow room for the 35° cable outlet and complete enclosure dimensions.
• Account for disconnection of the outgoing bus path when the termination switch is ON.

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