SIEMENS • 6ES7972-4AA50-0XA0
SIMATIC DP PRB Segment Controller
Automatic change-over control for redundant Power Rail Booster segment arrangements.
01Product Overview
Siemens 6ES7972-4AA50-0XA0 is the SIMATIC DP Power Rail Booster Segment Controller used to coordinate automatic change-over between PRB segments. Its coded M12 interfaces separate the two segment paths, the interconnection path, the 24 V DC supply and the discrete control signals, supporting structured maintenance of redundant PROFIBUS installations.
02Commercial Status
| Item |
Verified information |
| Manufacturer |
Siemens |
| Order number |
6ES7972-4AA50-0XA0 |
| Official designation |
PRB Segment Controller |
| Product family |
SIMATIC DP Power Rail Booster |
03Verified Technical Data
| Parameter |
Specification |
| Primary function |
Automatic change-over between PRB segments |
| Segment A interface |
X01, M12 socket, B-coded |
| Segment A-B interface |
X02, M12 pin, B-coded |
| Segment B interface |
X03, M12 socket, B-coded |
| Supply interface |
X04, 24 V DC, M12 socket, A-coded |
| Digital input |
X1, M12 pin, A-coded |
| Digital output |
X2, M12 pin, A-coded |
| Degree of protection |
IP54 |
| Operating temperature |
0 to 60 °C |
| Storage temperature |
−40 to 70 °C |
| Relative humidity |
Below 95%, non-condensing |
| Mounting position |
Any |
| Net weight |
760 g |
| Included items |
Controller, M12 covering cap and DIP-switch setting label |
04System Fit and Applications
Redundant PRB segmentsCoordinates automatic transfer between two defined Power Rail Booster segments.
Process communication infrastructureFits PROFIBUS installations using the Siemens PRB architecture.
Maintenance replacementRestores the controller function when the exact order number and connector coding match.
05Compatibility and Procurement Checks
- Match the complete order number 6ES7972-4AA50-0XA0.
- Confirm the PRB topology and the intended X01–X04 segment and supply assignments.
- Verify the A-coded and B-coded M12 cable components before installation.
- Record DIP-switch settings and field wiring before removing the installed controller.
06Lifecycle Note
The exact order number is documented by Siemens as a SIMATIC DP Power Rail Booster Segment Controller. Procurement should follow the current Siemens record for 6ES7972-4AA50-0XA0; no lifecycle label from another PRB variant has been applied here.
07Frequently Asked Questions
What does 6ES7972-4AA50-0XA0 control?
It controls automatic change-over between Power Rail Booster segments in a Siemens PRB installation.
Which connections are provided?
The controller uses coded M12 connections for segment A, the A–B link, segment B, 24 V DC supply, one digital input and one digital output.
What installation conditions are specified?
Siemens specifies IP54 protection, operation from 0 to 60 °C and unrestricted mounting position.
What should be recorded before replacement?
Document the DIP-switch settings, connector positions and cable coding so the existing PRB topology can be reproduced.
Request a verified offer for 6ES7972-4AA50-0XA0
Send the required quantity, destination and installed-system details for stock, compatibility, warranty and delivery review.
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