Name: RS-232/RS-485 Asynchronous Multipoint Line Driver
Brand: Black Box
Price: 239.95 USD
Availability: InStock

Black Box LD485A-MP RS-232/RS-485 Asynchronous Multipoint Line Driver

The Black Box LD485A-MP is a high performance RS-232/RS-485 asynchronous multipoint line driver designed for reliable data communication in demanding industrial environments. It converts standard RS-232 signals to RS-485 differential signalling, allo... Read More

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$239.95

Ships next business day.

In Stock: 1
Manufacturer: Black Box
Model or Part: LD485A-MP
Condition: New
Weight: 3.47lb
Dimensions: 13.00in x 6.25in x 4.25in

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Product Information

Item Condition

New - Sealed or Open Box Condition
Excellent - Almost-New, Missing Original Packaging
Refurbished - Seller Refurbished, Good Condition, Previously Used Item

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Description

Overview
The Black Box LD485A-MP is a high performance RS-232/RS-485 asynchronous multipoint line driver designed for reliable data communication in demanding industrial environments. It converts standard RS-232 signals to RS-485 differential signalling, allowing multiple devices to share a single bus with robust noise immunity and long cable runs. The compact, rugged package makes it ideal for integration into control panels, PLCs, and remote monitoring stations.

Key Features

Dual mode operation - supports both RS-232 and RS-485 protocols
Multipoint capability up to 32 nodes on a single bus
Fail-safe biasing for open-circuit detection
Wide operating temperature range from -40 to 85 degrees Celsius
Low power consumption for battery powered applications
Built-in short-circuit protection and overcurrent limiting
Compact 20mm x 20mm DIP package for easy board mounting

Technical Specifications

Supply voltage: 5 V DC (4.75 to 5.25 V)
Data rate: up to 115.2 kbps
Maximum bus length: 1200 meters at 9600 bps, 400 meters at 115.2 kbps
Driver output voltage: +/- 5 V typical
Receiver input voltage range: -7 to +12 V
Common mode voltage: -7 to +12 V
ESD protection: IEC 61000-4-2 level 4
Operating temperature: -40 to 85 degrees Celsius
Storage temperature: -55 to 125 degrees Celsius
RoHS compliant, lead free

Typical Applications

Industrial automation and PLC networking
Process control and SCADA systems
Remote telemetry units and data loggers
Building management and HVAC control
Transportation and railway signalling
Security and access control systems
Any application requiring reliable multi-drop serial communication over long distances

By delivering robust conversion between RS-232 and RS-485 with built-in protection features, the LD485A-MP helps engineers reduce wiring complexity, improve system reliability, and extend communication range without sacrificing performance.