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Networking > Terminal Servers

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LES42A

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Modbus ASCII/RTU Serial Server, RS-485  

Connect legacy Modbus devices more easily to your Ethernet network.

LES42A

Extended Double Diamond™ Warranty Available
(Three years for two)

Product Highlights

  • Provides a gateway between Modbus®/TCP and Modbus ASCII and RTU devices.
  • Enables older PLCs and similar devices to talk to newer sensors, meters, scales, and other monitoring instruments.

  • Description

    Modbus ASCII/RTU Serial Server, RS-485


    Quick Facts

  • Provides a gateway between Modbus®/TCP and Modbus ASCII and RTU devices.
  • Enables older PLCs and similar devices to talk to newer sensors, meters, scales, and other monitoring instruments.

  • Further Details

  • Handles most Modbus network configurations.
  • Supports links to 10- and 100-Mbps networks, detecting speeds automatically.
  • Serial data rates up to 115.2 kbps.
  • RS-485 model supports connections up to 32 serial Modbus devices.
  • Compact with clips for mounting on a DIN rail or on a panel.
  • Operate in harsh environments.

  • This DIN rail-mountable serial server converts industrial ASCII and RTU protocols to TCP protocol for communications between a Modbus and a 10- or 100-Mbps Ethernet network.


    Migrating to an Ethernet-based system in your industrial application? Well don‘t replace the older Modbus equipment you‘ve already invested in. Just use one of these easy-to-integrate boxes to translate the signals between older and newer protocols.

    Intelligent protocol translation.
    The Black Box® Modbus RS-485 ASCII/RTU Serial Server gives you a convenient and highly affordable way to link your Ethernet TCP/IP networks to any Modbus ASCII or RTU serial device in your factory or industrial application.

    The serial server translates between Modbus ASCII/RTU protocols and Modbus TCP protocols, formatting communications so the binary coding and CRC error checking in the RTU transmission and the characters in the ASCII format can be effectively carried across a TCP/IP network. PLCs can then talk to sensors, meters, scales, and other industrial monitoring and automation instruments.

    Flexible Modbus integration.
    Two versions of the Modbus ASCII/RTU Serial Servers are available. The LES41A connects to a Modbus device with an RS-232 interface, and supports TD, RD, and GND RS-232 lines. The LES42A works with a Modbus device with a four-wire RS-422 interface, or a two- or four-wire RS-485 interface, and supports TDA(-), TDB(+), RDA(-), and RDB(+) RS-422/485 lines.

    What‘s more, they work in most Modbus setups. Over a TCP/IP network, they enable:
  • Modbus ASCII/RTU slave devices to communicate with Modbus TCP/IP master units.
  • Modbus ASCII/RTU master devices to communicate with Modbus ASCII/RTU master devices.

    Easy network installation.
    These serial servers are also super easy to install. You typically connect the serial server to your 10-/100-Mbps network via a hub switch or router using standard straight-through CAT5 cable. But you can also connect it directly to your Ethernet network with a crossover cable. The Modbus RS-232 or RS-485 ASCII/RTU Serial Servers autodetect and adapt to speed of connected devices or your network.

    The included device installer software enables you to use a Telnet connection to discover the Modbus RS-232 or RS-485 ASCII/RTU Serial Server on the network and assign it an IP address. You use the same utility to easily configure master/slave, serial interface, and advanced Modbus settings, as well as monitor the serial server and verify its status. For at-a-glance monitoring, LEDs on the units indicate link integrity and data transfer activity.

    NOTE: RS-232 version also available.

  • Technical Specifications for Modbus ASCII/RTU Serial Server, RS-485:

    IP Address Assignment — Static IP or DHCP
    Operating Environment — Temperature: -4 to +176º F (-40 to 85º C);
    Humidity: 10 to 90%, noncondensing
    Operating Systems Supported — Windows® 98/2000/ME, Windows XP, Windows NT® 4.0
    Parity — None, Even, Odd
    Protocols Supported — TCP, UDP, DHCP, SNMP, Telnet, ICMP, ARP, TFTP, Modbus ASCII, Modbus RTU, Modbus/TCP
    Serial Data Bits — 7 or 8
    Serial Data Rates — 300, 600, 1200, 2400, 3600, 4800, 9600 bps; 19.2, 38.4, 57.6, 115 kbps
    Serial Protection — LES41A: 12 V TVS;
    LES42A: 5 V TVS
    Serial Stop Bits — 1, 2
    CE Approval — Yes
    Connectors — Network: (1) RJ-45;
    Serial: LES41A: (1) DB9 M (RS-232); LES42A: (1) 5-screw terminal block (RS-485);
    Power: (1) 2-screw terminal block
    Indicators — LEDs: Link Integrity, Activity, Power
    Power — Input: 10–30 VDC (power supply not included [PSD100])
    Size — 1.25"H x 4.5"W x 4.75"D (3.2 x 11.4 x 12.1 cm)
    This product works with:
  • DIN Rail 12-VDC Power Supply (PSD100)
  • DIN Rail (DR100)
    Questions? Contact our FREE Tech Support.

    NOTE: Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 877-877-2269.

  • Resources for Modbus ASCII/RTU Serial Server, RS-485:


    Connect your Modbus ASCII/RTU Serial Server, RS-485 with:

    Double Diamond Warranty

    Standard Manufacturer's Warranty


    A Five year warranty is included.

    Extended Two years for one Warranty Available


    Protect your purchase with an additional Two years for oneDouble Diamond™ warranty!
    Cost: $38.80

    Extended Three years for two Warranty Available


    Protect your purchase with an additional Three years for twoDouble Diamond™ warranty!
    Cost: $77.59

    Diamond

    Double Diamond™ Warranty (Standard)

    Coverage:

    The most complete product warranty exclusively from Black Box

    The Double Diamond™ Warranty is our no-questions-asked warranty that protects your Black Box® brand products* from accidental damage, including drops, water, and power surges.

    Most products come with a one- or two-year warranty. Some products, such as copper cables, manual switches, cabinets, and racks, are guaranteed for life! Standard Warranty features are as follows:

    Worry-Free Purchases

    If your new Black Box® brand products are accidentally damaged, you're covered with this no-questions asked warranty. FREE

    Coverage

    Double Diamond™ is the standard warranty that comes with your new Black Box® brand product. Most products come with a one- or two-year warranty.

    Lifetime Guarantees

    Many products, such as copper cables, manual switches, cabinets, and racks, are guaranteed for life.

    Fast Service

    During the warranty period, Black Box® Network Services will repair or replace your damaged equipment within one week of receipt at NO CHARGE!

    Extra Coverage

    Extend your warranty or protect a previously purchased Black Box® brand product* for an additional year for only 10% of the current retail price! And when you do, we give you the second year of extended coverage free! FREE Tech Support Hotline. No cost. No contracts. No kidding!

    No-Risk 45-Day Return Policy

    If it's not right, send it back.
    (Excludes custom built products)

    * Certain products may not be eligible.

    Warranty Compared

    Black Box® Double Diamond™ Warranty The Competition
    Warranty Length One Year to Lifetime, Depending on the Product. Read the fine print.
    Guaranteed for Life! Black Box® Brand Copper Cables, Manual Switches and More! No.
    Accidental Damage 100% Covered! No.
    Water Damage 100% Covered! No.
    Power Surges 100% Covered! No.
    Warranty Replacements No Questions Asked! Forget It.
    Tech Support Hotline 100% FREE! $$$
    You can find this product in the following subcategory(s)
     

    Add to Cart

    Price: $387.95

    Quantity

    Warranty

    Total

    In Stock

    Shipping Info

    In Stock - orders received before 8PM ET ship same day


    45-day return policy


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