Features:
- Automatic change-over selects between PRB segment paths.
- The 20.4 to 28.8 V DC input powers the monitoring and switching electronics.
- The IP20 housing is intended for protected cabinet installation.
PRB segment connections enter the controller as separate network paths.
The internal logic evaluates the documented operating condition and applies the automatic change-over function.
The selected path continues the SIMATIC DP segment connection while the enclosure protects the electronics.
The Siemens 6ES7972-4AA50-0XA0 SIMATIC DP PRB Segment Controller may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES7972-4AA50-0XA0 PRB Segment Controller Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Selecting the active PRB network path automatically
- Incoming paths: The PRB segments remain separate before the selection point.
- Change-over logic: The controller applies the documented automatic switching function.
- Selected path: The active segment continues toward the connected SIMATIC DP network.
- Network role: The unit controls segment selection rather than serving as a general I/O module.
Powering monitoring and switching from one DC input
- Lower boundary: The supply remains at or above 20.4 V DC.
- Upper boundary: The supply remains at or below 28.8 V DC.
- Internal load: The input feeds both supervision and change-over electronics.
- Cabinet source: Conductor protection follows the documented DC installation.
Keeping the segment controller inside its installation limits
- Enclosure: IP20 requires a protected cabinet location.
- Width: The product body occupies 200 mm across the mounting plane.
- Height: The controller body is 100 mm high.
- Depth: A 57 mm product depth must remain clear for installation.
Tracing a segment fault before changing network hardware
- Supply state: Confirm the DC input remains inside the permitted range.
- Segment path: Check each PRB segment independently at the controller.
- Connection order: Keep the incoming and outgoing network roles aligned.
- Change-over result: Verify that the selected path corresponds to the documented operating condition.