3IF791.9 CNC drive module (B&R)
 Product Introduction

3IF791.9 is an aPCI bus CNC drive communication module from B&R's 2005 system platform, specifically designed for CNC and motion control systems. It provides an X2X Link master station interface for connecting servo drives, stepper drives, and distributed I/O, enabling high-speed real-time data interaction between the CNC system and the drive units. It is compatible with B&R's CP360 series CNC CPUs and is a key expansion module for building compact and high-performance CNC equipment.

Basic Information

Product Model: 3IF791.9

Brand: B&R (Beckhoff, Austria)

Product Type: aPCI CNC Drive Communication Module

B&R ID Code: 0x13E3

Installation Method: Controller-specific aPCI slot (such as CP360 series)

Matching Terminals: 0TB704.9 (screw type) or 0TB704.91 (push-pull type), 4-pin 2.5 mm²

Protection Level: IP20 (EN 60529)

Certifications: CE, UKCA, cULus, EAC, KC

Operating Temperature: 0 - 60°C

Storage Temperature: -25 - 70°C

Relative Humidity: 5% - 95% (no condensation)

Weight: Approximately 0.125 kg

Interfaces and Bus Specifications

IF1 – X2X Link CNC Drive Master Station

Bus Type: X2X Link Master Station (Beckhoff CNC-specific high-speed fieldbus)

Connector: 4-pin male multi-point connector

Maximum Stations: 253 (can connect servo drives, I/O modules, etc.)

Network Topology: Linear

Station Distance: Maximum 100 m

Terminal Resistor: Built-in

Bus Power Supply: None

Data Transmission: Supports periodic and non-periodic data, meeting the real-time communication requirements of CNC interpolation, position loop, speed loop

Functions: Manages servo drive units and I/O modules under the X2X bus, transmits position commands, speed commands, status feedback, and alarm information.

Electrical Characteristics

Operating Voltage: 3.3 VDC, 5 VDC (supplied by the aPCI bus)

Power Consumption: 3.3 VDC: 0.43 W; 5 VDC: 0.76 W; Total Power Consumption: 1.19 W

Electrical Isolation: Complete electrical isolation between the PLC side and IF1 interface, with strong resistance to common-mode interference

Insulation Strength: Complies with industrial standards, suitable for strong electromagnetic interference environments

Status and Diagnosis

LED Indicators: 2 status lights, respectively indicating Tx (transmit) and Rx (receive) activity status

Diagnostic Function: Through LED and Automation Studio software, can monitor the bus communication status, data link quality, drive connection status, and fault codes in real time, supporting rapid location of communication interruptions, drive offline, data verification errors, etc.

Core Functions

CNC Drive-specific Communication: Optimized for CNC and motion control, supports high-speed transmission of servo drive position/velocity/torque closed-loop control instructions.

High Real-time Bus: X2X Link bus has low latency and high synchronization accuracy, meeting the core requirements of CNC such as multi-axis linkage, interpolation operations, etc.

Multi-Drive Networking Capability: A single module can manage up to 253 stations, supports multi-axis servo, I/O mixed networking, and is suitable for complex CNC equipment.

Seamless Integration with Beckhoff CNC System: Fully compatible with CP360 and other CNC CPUs, X20/X67 I/O, Beckhoff servo drives, programming and configuration are unified in Automation Studio. Industrial-grade reliability: wide temperature operation, electrical isolation, built-in terminal resistors, suitable for harsh environments such as vibration, dust, and electromagnetic interference in machine tool workshops.

Application fields

CNC machining centers, lathes, milling machines, grinders

Multi-axis coordinated CNC systems

Robots and automated production lines

High-speed motion control equipment for textiles, printing, packaging, etc.

B&R 2005 system CNC and drive expansion scenarios