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MVI71-Serial Picture

Generic Serial ASCII Network Interface Module for PLC


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The Generic Serial ASCII Network Interface Module is a fast and easy way to add two fully configurable ASCII communication ports to the PLC platform without consuming the front port of the processor. This allows the PLC processor to interface with any generic ASCII device such as bar code scanners, weigh scale interfaces, legacy ASCII protocol connections, terminal port emulation and printer drivers. Each port supports the sending and receiving of large ASCII character strings and is individually configurable.

Características y Beneficios

The MVI71-GSC module is a single slot, backplane compatible solution for the Rockwell Automation PLC platform. This module has two powerful and fully configurable ASCII communication ports, each supporting the sending and receiving of large ASCII character strings. With the implementation of some supporting ladder logic in the processor, the many different devices supporting ASCII communications can be integrated into the PLC platform.


The MVI71-GSC module is the ideal solution for the many applications where ASCII character communications must be added to the PLC platform. The MVI71-GSC module can be found in many industrial sectors generally involving the following applications:

  • Bar code scanner interfaces
  • Weigh scale interfaces
  • Legacy ASCII protocol connections
  • Terminal port emulation
  • Printer driver (alarm/status printer)


  •  Single Slot - 1771 backplane compatible
  • The module is recognized as an Input/Output module and has access to processor memory for data transfer between processor and module
  • Ladder Logic is used for data transfer between module and processor.
  • Configuration data obtained through user-defined ladder. Sample ladder file included




Form Factor

Single Slot 1771 chassis compatible
BTR/BTW data transfer
Local or remote rack

Backplane current load

800 mA @ 5 VDC

Operating temperature

32° F to 140° F (0° C to 60° C)

Storage temperature

-40° F to 185° F (-40° C to 85° C)


30 g operational
50 g non-operational


5 g from 10 to 150 Hz

Relative humidity

5% to 95% (without condensation)

LED Indicators

Module status
Backplane transfer status
Application status
Serial activity and error LED status

Debug/Configuration port (CFG)

CFG Port (P1)

RJ45 (DB-9M with supplied cable)
RS-232 only

Configuration Connector

RJ45 RS‑232 Connector (RJ45 to DB-9 cable shipped with unit)

Application Ports

Application Serial port (Serial Modules)

Two RJ45 RS-232/422/485 Application ports


ProSoft Configuration Builder (PCB)
MVI71-GSC Datasheet 81,23 kB Última Modificación 17.05.2010
MVI71-GSC User Manual 1.020,54 kB Última Modificación 01.12.2014
MVI71-GSC Sample Ladder 50,28 kB Última Modificación 30.04.2010



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