PROFIBUS Isolated BUS Connector PFB-G LED Indicator Surge Protection
PROFIBUS Isolated BUS Connector PFB-G LED Indicator Surge Protection
PROFIBUS Isolated BUS Connector (PFB-G) with LED Indicator & Surge Protection
The PFB-G PROFIBUS Isolated BUS Connector is engineered for demanding industrial environments where signal integrity and network reliability are critical. Featuring full galvanic isolation, built-in surge protection, and a real-time LED status indicator, this connector keeps your PROFIBUS-DP network running smoothly — even in high-electromagnetic-interference settings.
Made in Mainland China.
Key Features
- Full Galvanic Isolation: 1500 VDC isolation voltage — complete isolation between power-to-RS485 and RS485-to-RS485 circuits for maximum signal integrity.
- Flexible Power Supply: Automatically selects from 24 VDC ±10% (pin 7/pin 2) or 5 VDC ±10% (pin 6/pin 5) from either the PLC programming port or PROFIBUS-DP socket (DB9F female) — whichever is available.
- High-Speed Communication: Supports data rates from 0 to 10 Mbps with zero-delay auto-adaptation for seamless network integration.
- Internal Terminating & Bias Resistors: Switch-selectable built-in terminating and bias resistors eliminate the need for external components.
- LED Diagnostic Indicators: Four dedicated LEDs for PWR (Power), TXD (Transmit Data), RXD (Receive Data), and Term (Termination Resistor) for instant, at-a-glance status monitoring and faster troubleshooting.
- Lightning & Surge Protection: Isolated RS485 port features a repeatable surge protector — Ipp = 100A (10/700 µs, 4 KV), compliant with ITU-T K20/21 and VDE 0433 standards. Also provides ±15 KV ESD (electrostatic discharge) protection.
- Self-Recovery Overcurrent Protection: The isolated RS485 port withstands sustained overcurrent from continuous voltages up to 60 V without permanent damage.
- Scalable Network Architecture: Connect up to 32 PFB-G units on a single bus segment; expand to hundreds of stations by adding PROFIBUS repeaters or hubs.
- Rugged Construction: Plastic and metal housing designed for reliable long-term use in industrial control systems.
Technical Specifications
| Model | PFB-G |
| Isolation Voltage | 1500 VDC (Power↔RS485 & RS485↔RS485) |
| Power Supply | 24 VDC ±10% or 5 VDC ±10% (auto-select) |
| Communication Rate | 0–10 Mbps (zero-delay auto-adaptation) |
| Surge Protection | Ipp = 100A (10/700 µs, 4 KV); ITU-T K20/21, VDE 0433 |
| ESD Protection | ±15 KV |
| Max. Units Per Segment | 32 (expandable with repeaters/hubs) |
| LED Indicators | PWR, TXD, RXD, Term |
| EU LVD Voltage | Low Voltage: Below 50 VAC or 75 VDC |
| Material | Plastic + Metal |
| Package Contents | 1 × PFB-G Connector |
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Frequently Asked Questions
Q: What isolation voltage does the PFB-G PROFIBUS Isolated BUS Connector provide?
A: The PFB-G provides 1500 VDC full galvanic isolation — both between the power supply and RS485, and between RS485-to-RS485 circuits — making it highly suitable for industrial environments with significant electromagnetic interference.
Q: What communication speeds does the PROFIBUS BUS Connector support?
A: The PFB-G supports communication rates from 0 to 10 Mbps with zero-delay auto-adaptation, automatically adjusting to your PROFIBUS network's operating speed without any manual configuration.
Q: How many PFB-G connectors can be connected on a single PROFIBUS bus segment?
A: Up to 32 PFB-G units can be connected on a single bus segment. By adding PROFIBUS repeaters or hubs, the network can be expanded to hundreds of stations to accommodate larger industrial installations.
Q: What type of surge and ESD protection does this connector offer?
A: The isolated RS485 port includes a repeatable lightning surge protector rated at Ipp = 100A (10/700 µs, 4 KV), compliant with ITU-T K20/21 and VDE 0433 standards. It also provides ±15 KV electrostatic discharge (ESD) protection for added durability.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.