Description
Black Box LD485S ME741A RS-485 Serial Interface Module w/ Power Supply
The Black Box LD485S (ME741A) is a professional-grade RS-485 serial interface module designed for industrial data communications and legacy system integration. RS-485 is a robust serial standard widely used in industrial automation, building management systems, and point-to-point/multi-drop communication networks where distance and noise immunity are critical. This module facilitates reliable serial communication between devices operating at different signal levels or across longer cable runs than standard RS-232 allows.
Specifications & What's Included
- Make/Model: Black Box LD485S / ME741A
- Interface: RS-485 (balanced, differential serial)
- Signal Standard: Supports multi-drop and point-to-point topologies
- Connector Type: Terminal block connections for data and power
- Power Supply: Original Black Box power adapter included
- Form Factor: Compact desktop/benchtop module
- Application: Industrial serial interfacing, device integration, legacy system support
Applications
RS-485 serial interfaces like the LD485S are essential components in industrial control systems, building automation networks (HVAC, lighting, security), point-of-sale systems, and legacy equipment integration. The balanced differential design provides superior noise immunity over standard RS-232, making it ideal for manufacturing floors, data centers, and environments with electrical interference. This module was commonly used in the 1990s and 2000s for connecting industrial devices, sensors, and controllers across extended distances. Today, it remains in active use for maintaining and expanding legacy automation systems and for applications where RS-485's robustness and multi-drop capability are preferred over newer Ethernet alternatives.
This Black Box LD485S ME741A RS-485 serial interface module has been pulled from a working environment and is in good used condition. The unit has been visually inspected and appears to be fully functional. It is supplied with its original power supply. Please review our photo set and contact us with any questions before purchasing. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
Warranty Information
Additional Information
Brand: |
Black Box |
Model: |
LD485S |
Secondary Model: |
ME741A |
Type: |
RS-485 Serial Interface Module |
SKU: |
7256 |
Interface Type: |
RS-485 |
Connector Type: |
Terminal Block / D-Sub (RS-485) |
Seller Notes: |
Includes original power supply |
Country/Region of Manufacture: |
United States |
Form Factor: |
Desktop / Benchtop Module |
Condition: |
Used - Pulled from Working Environment |
Condition Notes: |
Black Box LD485S ME741A RS-485 interface module in good used condition, pulled from working environment. Includes original power supply. Visually inspected. |
