
#LES431A-R2
LES400 Series Industrial Serial Modbus Device Server - 1-Port
Remote access to serial devices across your LAN/WAN.
Product Features
- Provides a gateway between Modbus® TCP and Modbus ASCII or RTU devices.
- Software selectable for RS-232, RS-422, or RS-485.
- Operating Temperature -40 ~ 167 °F (-40 ~ 75 °C).
- Autosensing 10-/100-Mbps Ethernet port.
- Completely manageable through any Web browser.
- Provides a gateway between Modbus® TCP and Modbus ASCII or RTU devices.
- Allows older PLCs and similar devices to talk to newer TCP sensors and meters.
- Routes Modbus traffic based on Modbus ID, and remaps conflicting Modbus IDs.
- Offers Modbus messaging priority control, selectable by source or function code.
- Features a built-in Web server and easy-to-use management software.
- It can be easily integrated into most Modbus network configurations.
- Converts ASCII to RTU as well as ASCII or RTU to Modbus TCP.
- Features a DB9 port for serial connections.
- Equipped with a 10-/100-Mbps port for TCP connectivity.
- Boasts high throughput with low latency.
- Mounts on a DIN-rail or wall. Includes a DIN mounting clip and spring.
The LES431A-R2 series Modbus gateway is a bi-directional gateway for integrating new and existing Modbus/RTU and Modbus/ASCII serial devices to operate with newer TCP/IP networked-based devices. The LES431A-R2 gateway features one independent Ethernet port and MAC address. It provides a simple and cost-effective way to bring remote management and data accessibility to thousands of older Modbus devices that cannot otherwise connect to a network. The LES431A-R2 allows users to select client or server operation mode for each serial port. It enables an Ethernet client to control serial servers, and also allows a serial client to control Ethernet servers.
Configuration can be done via Black Box Windows Configuration Utility, Telnet Console, or Web Browser so you can improve productivity and cut down on the amount of time required to troubleshoot a serial device on a factory floor or in a remote location. Configure devices, upgrade firmware, and more - all this from the comfort of your office.

1 Year Double Diamond™ Warranty (Standard)
Take the risk out of equipment purchases with the Double Diamond™ Warranty from Black Box.
Our Double Diamond Warranty* protects your Black Box® brand products from manufacturing and/or material defects.
The LES431A-R2 comes with a standard 1 Year Double Diamond Warranty*. During the warranty period, Black Box will repair or replace your damaged equipment at NO CHARGE!*
What’s more, we also have a 30-day return policy on most products. Simply call Customer Service for a Return Authorization (RA) number, return your product in new condition and in the original package to receive a full refund.** Click here to find your local sales office to obtain a Return Authorization.
Extended Double Diamond Warranty.
Extend the warranty on select products or protect eligible previously purchased Black Box® brand items for an additional year - at just 10% of the original purchase price or for three years for only 20% of the purchase price.
* Warranty subject to certain exclusions and limitations. Click here to view our full terms and conditions.
** Returns contingent upon specific exclusions and limitations. Click here to view our full return policy.