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Model 4176 High Speed USB to RS485/422/232 Interface Converter, Desktop, Catalog #304176

    RS485/422/232 Interface Converter, DesktopRS485/422/232 Interface Converter, Desktop
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    • RS485/422/232 Interface Converter, Desktop
    • RS485/422/232 Interface Converter, Desktop
Base Price:
Catalog No: 304176
Model No: 4176
Product Type:Interface Converter
Converter Port Connector:DB9, USB Type-B
Conversion Type:RS232, RS422, RS485, USB
Speed:up to 12 Mbps USB Data Transfer Rates


Shipping Terms

Shipments are made via UPS Ground, unless otherwise specified. Freight charges are prepaid and added to your invoice. We can estimate the freight costs for you.

We can ship freight collect on your account, just provide your UPS Account Number.

We can also ship via the carrier of your choice. Provide the details and your account number.

Products shall be shipped F.O.B. Electro Standards' facility. Title to and risk of loss or damage to the products shall pass to you upon Electro Standards delivery of the products to a carrier for shipment. Title to software will remain with the applicable licensor. Electro Standards' prices do not include shipping and handling charges. Electro Standards reserves the right to use its own discretion in the manner and routing of shipments. Electro Standards shall be permitted to deliver products in separate lots.

Shipping Return Policy

  • To return an item, contact Electro Standards at 401-943-1164 to obtain a Return Material Authorization (RMA) number. RMA numbers are valid for 30 days after the date of the shipment and cannot be extended or re-issued. We are unable to accept returns without an RMA number.
  • All returns except those of defective product are subject to a 15% restocking fee, and additional charges for handling or freight are refunded only in cases of defective products.
  • Return freight must be shipped prepaid. We recommend that you insure the package as you are responsible for risk of loss on all returned packages. We recommend that all cartons are properly packed as Electro Standards is not responsible for product damaged en route. We do not issue call tags for product returns.
  • Returned product must be clean, undamaged, and complete with all manuals, accessories, documents and packaging. The items must be in a resalable condition.
  • The product must have with it a copy of the original invoice or packing slip and the appropriate RMA paperwork.
  • If your item is not working properly, please contact Electro Standards at 401-943-1164 for help in trouble-shooting your application.
  • If the product is defective, Electro Standards will repair or replace that item (at our discretion) upon receipt and evaluation of the original product.
  • Electro Standards reserves the right to authorize product returns after 30 days from the invoice date in some cases. If the product is accepted after 30 days, credit will be issued toward future pruchases only and some additional restocking charges may be applied.
  • All credits from RMAs must be used within one calendar year of issue.

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Model 4176 High Speed Ruggedized USB to RS485/422/232 Interface Converter, Desktop Configuration

  • Ideal for Multi-Point Applications

The Model 4176 is a high speed ruggedized USB to RS485/422/232 interface converter from Electro Standards Laboratories. With its integrated rate buffering, the Model 4176 converts USB 2.0 compliant data from a standard PC to a serial asynchronous data interface over RS232 or RS485/422 networks. The baud rate is user selectable with operating speeds up to 1.5 Mbps for RS232 and up to 3 Mbps for RS485/422.

When operating in RS485 (RS422 compatible) mode, the converter can be configured for 2-wire half duplex or 4-wire full duplex operation. This converter provides an industrial solution for applications requiring a single point-to-point or a multi-point communications link over short and long distances.

  • Typical applications include USB PC to PC long distance communications, factory automation, multi-drop data collection devices, barcode readers, time clocks, scales, data entry terminals, ATMs, and serial communications in harsh environments.

The Model 4176 is designed to operate from -40°C to 85°C and is a member of the Electro Standards Laboratories rugged media converter family. The unit features ESD protection circuitry on the USB I/O connector as well as all receivers and transmitters for both the RS232 and RS485/422 interfaces. The unit's power input is protected from transients. Other features include user selectable asynchronous data format, TX, RX and Power indicator LEDs.

It is also available as a board only (Model 4177) with front mounting threaded brackets for rack mounting in embedded applications. 

It is also available as a DIN Rail mounted package (Model 4176-DIN).


  • USB Interface: 
    • Connectors: USB, Type B, High Retention 
  • USB Data Format:
    • Type: USB 2.0 Compliant USB Client
    • Rate: Supports low speed (1.5 Mbps) and Full speed (12 Mbps) USB Data transfer rates.
  • Copper Interface:
    • Connectors: DB9, Female
    • Type: RS232, RS485/422 (2-Wire/4-Wire)
    • Terminations: RS485/422 120 Ohm jumper selectable
  • Bit Rate (user selectable):
    • RS232: 300 to 1.5 Mbps.
    • RS485: 300 to 3 Mbps.
  • Network Configurations:
    • RS232: Point-to-Point
    • RS485/422 Point-to-Point
      Multi-Point (Default ~280 uSec TX disable time)
      (User configurable TX disable time via a single thru-hole resistor)
  • Indicators:
    • LEDs: TXD, RXD, PWR
  • Power:
    • Input Power: 5V at 250 mW (Typical)
    • Connectors: USB, Type B, High Retention
    • Operating Environment:
      • -40°C to 85°C
    • Model 4177 Mechanical (Board Only): 
      • Model / Cat No: 4177 / 304177
      • Size: 4.8" x 3.9" x 0.63"
      • Weight: Approx. 3.5 oz (99g)
      • Mounting: Mounting Holes, Rt Angle Brackets
    • Model 4176 Mechanical (Desktop Unit):
      • Model / Cat No: 4176 / 304176
      • Size: 5" x 4.25" x 1.4"
      • Weight: Approx. 10.1 oz (286g) 
    • Model 4176-DIN Mechanical (DIN Rail Mounted Unit):
      • Model / Cat No: 4176-DIN/ 304176-DIN
      • Size: 5" x 4.25" x 1.4"
      • Weight: Approx. 10.1 oz (286g)
      • Mounting: 4 Threaded Holes Standard, DIN rail

    USB A-B Cable: ESL Cat. No. 507366. (6Ft Included with Model 4176)

    This converter provides an industrial solution for applications requiring a single point-to-point or a multi-point communications link over short or long distances. 

    Municipalities, schools, government: This product is on GSA Schedule!

    BLOCK DIAGRAM: High Speed Ruggedized USB to RS485/422/232 Interface Converter.

    APPLICATION 1: Point-to-Point PC USB Communications.

    Network Application Diagram of Model 4176 / 4177 USB Interface Converter Point-to-Point PC USB Communications Application

     APPLICATION 2: PC USB  to RS232 communications to serial interface / network.

    APPLICATION 3: PC USB to RS485 communications to serial interface / network.

    This product is offered at a discount to city, state, and municipal government purchasers via GSA Schedule GS-35F-0286V.

     All data switches, fiber optic converters, data communication products, and data acquisition products are subject to a one year warranty against manufacturing defects.  The limit of ESL liability is limited to the cost of the ESL product provided.
    *Prices of USB Interface Converters are subject to change and verification.
    All ESL USB Converters are available for export.

    Available Combo Deals