In the realm of industrial automation, maintaining seamless communication within PROFIBUS networks is paramount. For effective communication analysis, especially during critical phases like commissioning, routine maintenance, or urgent troubleshooting, the ability to connect diagnostic tools without disrupting the network is indispensable. This is where non-reactive measuring points become essential, offering a window into your PROFIBUS system’s health without interrupting operation. Planning for these access points during the PROFIBUS network design is not just good practice—it’s a necessity for proactive diagnostics.
To accurately assess the signal-to-noise ratio within a PROFIBUS network segment, strategically placed, non-interacting measuring points are crucial. Ideally, these points should be accessible at all times, even while the system is running. For the most comprehensive insight into transmission quality, these measuring points are best located at both ends of each network segment.
The PBMA IP20 Active Measuring Point is engineered to not only serve as a non-reactive measuring point but also to function as an active bus terminator. A clear Power LED indicator confirms the 24 V power supply required for the integrated terminating resistor is active. Diagnostic equipment connects effortlessly via the PROFIBUS connector’s PG/diagnosis interface. For a seamless, non-intrusive connection of programming devices like laptops or field PGs, utilizing an active programming cable such as the APKA or APKA II is highly recommended. Think of the PBMA IP20 as your PROFIBUS network’s equivalent to an Eobd Plug, providing essential access for diagnostics and health checks.
Connection Versatility
The PBMA IP20 offers flexible connection options to suit various PROFIBUS network setups:
- Fast Connect PROFIBUS line: Utilizing IDC terminal for rapid and reliable connections (Art. No.: 110080001).
- Screw Terminal Technique: For robust and secure connections using screw terminals (Art. No.: 110080003).
- 90° Cable Outlet: Provides a right-angle cable exit for space-constrained environments (Art. No.: 110080002).
Electrical Specifications
The PBMA IP20 is designed for reliable performance within PROFIBUS networks, featuring:
- Baud Rate Flexibility: Supports baud rates from 9.6 kbps up to 12 Mbps, accommodating a wide range of PROFIBUS applications.
- DC Power Input: Operates on a 24 VDC supply (with a range of 20-28 VDC), and is protected against reverse polarity.
- Auxiliary Output: Provides a 5 VDC / 200 mA output (short-circuit proof) on Pin 6, with Pin 5 as GND.
- Low Current Drain: Typically consumes only 30 mA.
- Screw Terminal Power Supply: Power is conveniently supplied through screw terminals.
- Integrated Terminating Resistor: Features a built-in terminating resistor, easily switchable via an external sliding switch on the connector.
Crucially, ensure the functional earth connection is properly established for effective PROFIBUS shield operation.
Environmental and Physical Attributes
Designed for industrial environments, the PBMA IP20 offers:
- Operating Temperature Range: Functions reliably in temperatures from 0 °C to +70 °C.
- IP20 Protection: Classified with IP20 protection.
In terms of physical design:
- Dimensions:
- PBMA: Approximately 82 x 22.5 x 74 mm
- PBMB: Approximately 82 x 22.5 x 40 mm
- Lightweight: Weighs approximately 116 g.
- Robust Construction: Active adapter (PBMB) casing made from durable plastic, Diagnostic plug Fast Connect from zinc die casting, and Diagnostic plug screw terminal from metallized plastic.
- DIN Rail Mounting: Easily mounted by snapping onto DIN rails according to EN 50022.
The PBMA IP20 Active Measuring Point is an indispensable tool for anyone working with PROFIBUS networks. Its robust design, versatile connection options, and dual functionality as both a measuring point and active terminator make it a vital component for ensuring network reliability and simplifying diagnostic processes. Just as an EOBD plug is critical for automotive diagnostics, the PBMA IP20 provides that essential access point for maintaining the health and efficiency of your PROFIBUS network.
