BB-422PP9TB Serial Converter: RS-232 to RS-422 Port-Powered Solution
The B+B SMARTWORX BB-422PP9TB is a port-powered serial converter engineered for industrial automation and legacy system integration. This RS-232 to RS-422 converter eliminates external power requirements by harvesting power directly from RS-232 handshaking signals, making it ideal for distributed automation environments, remote monitoring systems, and industrial control applications where power infrastructure is limited. Perfect for engineers upgrading RS-232 devices to RS-422 standards without redesigning power distribution.
Key Features
- Port-powered design — no external power supply required
- Converts RS-232 DB9 female to RS-422 terminal block connections
- Bidirectional full-duplex data communication
- Uses RS-232 handshaking signals for autonomous operation
- Industrial-grade reliability for automation environments
- Compact form factor for panel and DIN rail mounting
- Supports standard RS-232 and RS-422 protocols
Technical Specifications
| Specification |
Details |
| Manufacturer |
B+B SMARTWORX |
| Part Number |
BB-422PP9TB |
| Input Interface |
RS-232 DB9 Female |
| Output Interface |
RS-422 Terminal Block |
| Communication Mode |
Bidirectional Full-Duplex |
| Power Source |
Port-Powered (RS-232 Handshaking Signals) |
| Data Rate |
Up to 115.2 kbps |
| Operating Temperature |
0°C to 60°C |
| Storage Temperature |
-20°C to 80°C |
| Humidity |
5% to 95% non-condensing |
Frequently Asked Questions
What is a port-powered serial converter and why do I need one?
A port-powered serial converter like the BB-422PP9TB draws power directly from RS-232 handshaking signals, eliminating the need for separate power supplies. This is essential in industrial automation where adding external power infrastructure is costly or impractical, allowing you to upgrade legacy RS-232 systems to RS-422 standards seamlessly.
Can the BB-422PP9TB handle bidirectional RS-422 communication?
Yes, the BB-422PP9TB supports full-duplex bidirectional communication, enabling simultaneous two-way data transmission between RS-232 and RS-422 devices. This ensures reliable data flow in industrial control and monitoring applications without communication bottlenecks.
How does the RS-232 to RS-422 conversion improve system reliability?
RS-422 offers superior noise immunity, longer cable distances (up to 4,000 feet), and multi-drop capability compared to RS-232. The BB-422PP9TB converter enables your legacy RS-232 equipment to leverage these advantages, improving signal integrity and reducing errors in harsh industrial environments.
Is external power required for the BB-422PP9TB?
No, the BB-422PP9TB is completely port-powered. It harvests power from RS-232 handshaking signals (RTS/DTR), making it ideal for remote installations and applications where power availability is limited or where adding power infrastructure is not feasible.
