SIEMENS 6ES7972-0BB42-0XA0 Profibus Connector 45° | Replacement, Equivalent & Selection Guide
The SIEMENS 6ES7972-0BB42-0XA0 is a 45-degree Profibus DP bus connector designed for SIMATIC S7 and other Profibus-compatible systems. This page provides full technical specifications, compatible replacement models, application guidance, and a structured selection guide to help engineers and procurement teams make informed sourcing decisions.
Technical Specifications
- Part Number: 6ES7972-0BB42-0XA0
- Manufacturer: Siemens AG
- Product Family: SIMATIC S7 / Profibus DP Accessories
- Connector Type: Profibus DP Bus Connector, 45° Cable Exit
- Cable Exit Angle: 45°
- Transmission Rate: Up to 12 Mbit/s
- Degree of Protection: IP20
- Connection Method: Screw terminal (A-line / B-line)
- Bus Termination: Switchable (integrated terminating resistor)
- Connector Interface: 9-pin Sub-D (female)
- Cable Diameter Supported: 8 mm (standard Profibus cable)
- Operating Temperature: -20°C to +85°C
- Storage Temperature: -40°C to +85°C
- Weight: Approx. 100 g
- RoHS Compliant: Yes
Compatible Replacement & Equivalent Models
The following models are functionally equivalent or drop-in replacements for the 6ES7972-0BB42-0XA0. Always verify cable exit angle, termination requirements, and baud rate compatibility before substitution.
- 6ES7972-0BB41-0XA0 — Previous generation, 45° exit, up to 12 Mbit/s (pin-compatible)
- 6ES7972-0BA42-0XA0 — 90° cable exit variant; same electrical specs, different mechanical form factor
- 6ES7972-0BB52-0XA0 — With PG socket (programming port), 45° exit
- 6ES7972-0BA52-0XA0 — With PG socket, 90° exit
- Phoenix Contact SUBCON-PLUS-PROFIB/SC — Third-party compatible Profibus DP connector, 45°
- Weidmüller IE-PS-V04P-RJ45-BK — Industrial-grade alternative; verify pinout before use
Note: Third-party replacements may require additional configuration. Konmask recommends using OEM parts for safety-critical applications.
Why Choose the Original Model
- ✅ Guaranteed Compatibility: Engineered specifically for SIMATIC S7-300, S7-400, S7-1500, and ET 200 distributed I/O systems
- ✅ Full Baud Rate Support: Supports all Profibus DP baud rates from 9.6 kbit/s to 12 Mbit/s without derating
- ✅ Integrated Bus Termination: Switchable terminating resistor eliminates need for external termination at line ends
- ✅ Robust Construction: Industrial-grade housing rated for harsh environments
- ✅ Siemens Quality Assurance: Manufactured and tested to IEC 61158 Profibus standards
- ✅ Long-term Availability: Supported by Siemens global spare parts program
Typical Applications
- SIMATIC S7-300 / S7-400 / S7-1500 PLC network wiring
- ET 200M / ET 200S / ET 200SP distributed I/O connections
- SINAMICS and MICROMASTER drive Profibus integration
- Panel-mounted HMI (TP/MP series) Profibus connections
- Industrial robot controllers with Profibus DP interface
- Process automation field device (transmitter, valve positioner) connections
- Factory automation bus segment termination points
System Compatibility
- PLC Platforms: SIMATIC S7-300, S7-400, S7-1500, S7-200 (via EM 277)
- Distributed I/O: ET 200M, ET 200S, ET 200SP, ET 200pro
- Drives: SINAMICS G120, G150, S120; MICROMASTER 420/440
- HMI: SIMATIC TP177, MP277, MP377 and compatible panels
- Protocol: Profibus DP (EN 50170 / IEC 61158)
- Cable Type: Standard Profibus cable (violet, 2-wire shielded, 150 Ω impedance)
Selection Guide
Use the following criteria to select the correct Profibus connector for your application:
- Cable Exit Angle: Choose 45° (this model) for panel-interior wiring with space constraints; choose 90° (0BA42) for straight-back cable routing
- PG Socket Required? If online programming access via the connector is needed, select 0BB52 (45°) or 0BA52 (90°)
- Bus Termination: Only the first and last node on a Profibus segment require termination enabled — all intermediate nodes must have termination OFF
- Baud Rate: All variants in the 0BB42 family support up to 12 Mbit/s; no derating required
- Quantity per Segment: Maximum 32 nodes per segment without repeater; use DP/DP coupler or repeater for larger networks
- Environment: IP20 rating — suitable for control cabinet installation; for field-mounted applications consider IP65/67 M12 connectors
| Model | Exit Angle | PG Socket | Max Baud Rate | Termination |
|---|---|---|---|---|
| 6ES7972-0BB42-0XA0 | 45° | No | 12 Mbit/s | Switchable |
| 6ES7972-0BA42-0XA0 | 90° | No | 12 Mbit/s | Switchable |
| 6ES7972-0BB52-0XA0 | 45° | Yes | 12 Mbit/s | Switchable |
| 6ES7972-0BA52-0XA0 | 90° | Yes | 12 Mbit/s | Switchable |
Quality Assurance & Sourcing
- Origin: Genuine Siemens product sourced through authorized distribution channels
- Inspection: Each unit inspected for physical integrity, label authenticity, and packaging condition prior to dispatch
- Traceability: Batch and date codes recorded for full supply chain traceability
- Warranty: 12-month warranty against manufacturing defects
- Anti-Counterfeit: Konmask sources exclusively from verified suppliers — certificates of conformity available on request
How to Order
- Part Number: 6ES7972-0BB42-0XA0
- MOQ: 1 piece
- Lead Time: In-stock items ship within 1–3 business days; ex-stock lead time varies by region
- Bulk Pricing: Available for orders of 10+ units — contact us for a quote
- Payment: T/T, PayPal, credit card accepted
- Shipping: DHL / FedEx / UPS international express; sea freight available for large orders
- 📧 Email: [email protected]
- 📞 Phone/WhatsApp: +0086 19859288691
- 🌐 Website: https://Konmask.com
Replacement & Compatibility FAQ
Q: Can I use 6ES7972-0BB41-0XA0 as a direct replacement for 0BB42?
A: Yes, the 0BB41 is the previous hardware revision. It is electrically and mechanically compatible in most applications, though the 0BB42 is the current recommended version.
Q: What is the difference between 0BB42 and 0BA42?
A: The only difference is the cable exit angle — 0BB42 exits at 45°, 0BA42 exits at 90°. Electrical specifications are identical.
Q: Do I need to enable bus termination on every connector?
A: No. Only enable termination on the first and last physical node of each Profibus segment. All intermediate connectors must have termination switched OFF.
Q: Is this connector compatible with Profibus PA?
A: No. This connector is designed for Profibus DP. Profibus PA uses a different physical layer (IEC 61158-2) and requires dedicated PA connectors and couplers.
Q: Can I use third-party Profibus cables with this connector?
A: Yes, provided the cable meets EN 50170 Type A specifications: 2-wire shielded, 150 Ω characteristic impedance, max. capacitance 30 pF/m.
Q: What is the maximum segment length at 12 Mbit/s?
A: At 12 Mbit/s, the maximum Profibus DP segment length is 100 m. Use repeaters to extend the network.
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