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Questions about this product? Free pre-sales support from a senior specialist — product questions, compatibility checks, BOM quotes, price confirmation — typically answered within one business day. Need camera placement or system design work? Engineering time is $175 per hour (qty 1 = 1 hour). Hardware buyers get up to one hour ($175) credited back on their order.
Black Box LES920A-RJ45-TB Serial Device Server
Overview
The Black Box LES920A-RJ45-TB is a compact serial device server designed to bridge legacy industrial serial devices (RS-232, RS-422, RS-485) to modern Ethernet networks. This unit is essential for integrating older PLCs, sensors, or control panels into an IP-based surveillance or automation system, enabling remote monitoring and management without replacing existing serial hardware. Its rugged construction and terminal block interface suit demanding environments.
Compatibility
This device server is designed for broad compatibility with industrial serial equipment supporting RS-232, RS-422, and RS-485 protocols. It functions as a transparent gateway, meaning it passes serial data directly over TCP/IP or UDP, making it compatible with any host system or VMS that can communicate with serial devices via network. Specific compatibility extends to systems requiring serial data acquisition for logging or control, such as certain legacy NVRs or industrial automation controllers that utilize serial ports for configuration or data transfer.
Installation Notes
Installation requires connecting the RS-232/422/485 serial interface via the terminal block and an Ethernet connection via the RJ45 port. Configuration is performed through a web interface or dedicated utility, allowing for IP address assignment, serial port settings (baud rate, data bits, parity, stop bits), and network protocol selection (TCP Server/Client, UDP). Ensure proper grounding for the terminal block connections in industrial settings to prevent interference.
What's in the Box
- 1x Black Box LES920A-RJ45-TB Serial Device Server
Black Box 4-Port Indus 232/422/485 Dev Ser TB - LES920A-RJ45-TB
Build Your Complete System
Manufacturer-verified compatible cameras, recorders, mounts, accessories, and licenses for this product. Adjust quantities and add the entire bundle to your cart in one click.
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System Design, Deployment & Technical Support
Support services and planning resources for commercial surveillance, access control, and infrastructure deployments.
Fixed scope • Fixed price
System Design Assistance
- Get help validating product compatibility
- Coverage requirements
- Storage planning and deployment architecture before you buy.
Deployment & Configuration Support
- Access fixed-scope support for rollout planning
- User setup guidance
- Migration and system standardization across single-site or multi-site deployments
Guides, Tools & Calculators
- PoE requirements
- Storage retention
- Camera selection and deployment methodology