3IF681.86 Communication Module Product Details Description Product Introduction

3IF681.86 is a dedicated communication interface module for the BECKHOFF SYSTEM 2005 series. It features an integrated compact design, integrating RS232 serial interface and 10BASE-T Ethernet interface. It can be directly used to expand the slots of the main control unit of the same series. The module has industrial-grade anti-interference capability, electrical isolation protection, and hot-swappable function. It operates stably and reliably, and can simultaneously meet the communication requirements of traditional serial port devices and the networking needs of industrial Ethernet. It is an important expansion component for realizing equipment interconnection, data transmission, and remote debugging in automation control systems, and can long-term adapt to various industrial application scenarios within the control cabinet. Basic Information

The product model is 3IF681.86, belonging to the SYSTEM 2005 interface module series, and the product type is a multi-protocol composite communication module. This module is installed in a slot by direct insertion, and it is compatible with standard slot positions such as CP260, IF260, and IF060 in the 2005 series. The overall size is regular, the weight is light, and the protection level reaches IP20. It is only suitable for indoor control cabinet installation. The working power supply of the module is uniformly provided by the system backplane as standard 5VDC, without the need for additional external power supply. The product has passed multiple international industrial certifications such as CE, UL, and CSA, and complies with mainstream industrial equipment safety standards.

Function and Positioning

This module mainly serves as a dual-link communication expansion unit for the control system, responsible for data transfer between field devices and the main control system, upper-level platforms. The RS232 serial port is mainly used for point-to-point connections with human-machine interfaces, barcode scanning devices, serial printers, and various old serial communication devices, completing short-distance stable data interaction. The Ethernet interface relies on the 10BASE-T network architecture and can achieve network communication between PLC and upper-level computers, SCADA monitoring systems, and other automation controllers, supporting program upload and download, remote online monitoring, and system data sharing functions. The module supports hot-swappable operations without downtime, making on-site installation, replacement, and daily maintenance operations more convenient, effectively reducing equipment downtime losses. It is mainly targeted at communication function expansion for small and medium-sized automation projects and network upgrade for outdated equipment.

Core Performance Parameters

The module is equipped with one 9-pin D-Sub interface RS232 channel and one RJ45 interface 10BASE-T Ethernet channel. The communication protocols are compatible with RS232 standard ASCII protocol and binary transmission protocol. The Ethernet end supports TCP/IP and UDP general network protocols. The maximum communication rate of RS232 can reach 19.2 kbps, and the fixed transmission rate of Ethernet is 10 Mbps, supporting half-duplex and full-duplex automatic adaptation. There is an electrical isolation design between the two communication interfaces, significantly improving the anti-interference performance in complex industrial environments. The overall power consumption of the module does not exceed 2.5W, and the working temperature range is from -20°C to 60°C, the storage temperature range is from -40°C to 85°C. The relative humidity requirement of the working environment is 5% to 95%, and no condensation should occur in the environment. The panel is equipped with status indicator lights, which are used to display the receiving and transmitting status of the serial port, the connection status of the Ethernet link, and the data activity status of the network part. The network part supports static IP address configuration, fully matching the network architecture of the SYSTEM 2005 series system.

General Adaptable Accessories

The accompanying communication cables include shielded RS232 straight-through communication cables and industrial shielded twisted pair cables for 10BASE-T networks. The connection accessories include 9-pin D-Sub connectors and industrial-grade RJ45 network connectors. The installation accessories can be selected from the multi-specification standard backplane of SYSTEM 2005 series and the DIN rail installation kit for the main control station. The accompanying software tools include Beckhoff Automation Studio programming and configuration software, Ethernet communication configuration program, RS232 device driver, and network fault diagnosis tool.

Applicable Equipment Domains

It is widely used in 2005 series PLC control systems in the industrial automation field, automated assembly lines, process control sites, and discrete processing production lines. Suitable for the construction of factory internal networks, data interaction between PLC, human-machine interfaces and upper-level systems, remote monitoring and remote operation systems of equipment. It can be used in conjunction with various general industrial mechanical equipment such as packaging machinery, textile equipment, injection molding machinery, woodworking equipment, and electronic processing equipment. At the same time, it is compatible with HVAC systems, building control equipment, and energy monitoring management systems in the building automation field. In the process industry, it can be used for water treatment equipment, food and beverage production lines, pharmaceutical equipment, and small and medium-sized chemical control systems. It can also be used for the renovation of old equipment in the field, the networking conversion of serial port equipment, and the expansion of communication functions of embedded control units, etc. for renovation projects.