B+B SMARTWORX BB-232SPHI4 Serial Repeater with 4 kV Isolation
The BB-232SPHI4 serial repeater is engineered for industrial and commercial applications requiring robust RS-232 signal protection over extended distances. This DB25 serial repeater delivers 4 kV galvanic isolation to eliminate ground loops, noise interference, and signal degradation in harsh electrical environments. With integrated port power capability, this repeater eliminates external power supply requirements, reducing installation complexity and cost.
Perfect for manufacturing facilities, automation systems, legacy equipment integration, and multi-device serial networks, the BB-232SPHI4 ensures reliable data transmission while protecting sensitive equipment from voltage spikes and electrical noise.
Key Features
- 4 kV galvanic isolation protects against ground loops and electrical interference
- RS-232 DB25 connector configuration for standard serial communications
- Port-powered design eliminates need for external power adapters
- Extends RS-232 signal range for reliable long-distance data transmission
- Industrial-grade construction for harsh environment operation
- Compact form factor for space-constrained installations
- Plug-and-play connectivity with no software configuration required
Technical Specifications
| Specification |
Details |
| Manufacturer |
B+B SMARTWORX |
| Model Number |
BB-232SPHI4 |
| Product Type |
Serial Repeater |
| Interface Standard |
RS-232 |
| Connector Type |
DB25 |
| Isolation Level |
4 kV Galvanic Isolation |
| Power Supply |
Port-Powered (no external supply required) |
| Signal Protection |
Ground loop elimination, EMI/RFI filtering |
| Operating Environment |
Industrial |
Frequently Asked Questions
What is a serial repeater and why do I need 4 kV isolation?
A serial repeater amplifies and regenerates RS-232 signals to extend transmission distance. The 4 kV isolation galvanically separates circuits, preventing ground loop noise and protecting equipment from voltage spikes—critical in industrial environments with multiple power sources and long cable runs.
Does the BB-232SPHI4 require external power?
No. The BB-232SPHI4 is port-powered, drawing power directly from the RS-232 serial port. This eliminates the need for external power supplies, simplifying installation and reducing cable clutter in industrial control systems.
How far can I extend RS-232 signals with this repeater?
The BB-232SPHI4 regenerates RS-232 signals to extend transmission distances beyond standard 50-foot limitations. Exact range depends on cable quality and baud rate, but industrial-grade serial repeaters typically support distances up to 500+ feet with proper shielding.
Is the BB-232SPHI4 compatible with legacy industrial equipment?
Yes. The standard DB25 RS-232 connector and galvanic isolation make this serial repeater ideal for retrofitting legacy automation systems, PLCs, and industrial controllers requiring noise-free signal transmission and ground loop protection.
