Allen-Bradley 1761-NET-AIC Network Interface Converter | DH-485, RS-232/422/485, 19.2K Baud Specs

Allen-Bradley 1761-NET-AIC Network Interface Converter | DH-485, RS-232/422/485, 19.2K Baud Specs

Allen-Bradley 1761-NET-AIC network interface converter specifications. DH-485 to RS-232/422/485 converter, 19.2K baud, 24V DC, IP20. For industrial network communication.

Product Overview

The Allen-Bradley 1761-NET-AIC​ is a network interface converter​ designed to provide connectivity between different industrial network protocols. This module converts between DH-485 network signals​ and standard RS-232/422/485 serial communication, operating at up to 19.2K baud. The "1761" designation indicates the MicroLogix accessory series, "NET-AIC" specifies the network advanced interface converter. This compact device enables communication between Allen-Bradley PLCs using DH-485 protocol and devices using standard serial interfaces, such as HMIs, SCADA systems, computers, and other industrial equipment.

Technical Specifications

Note: Specifications are based on Allen-Bradley 1761 series technical documentation. The "1761-NET-AIC" model specifically indicates the network advanced interface converter. Actual specifications may vary slightly depending on production batch.

Model Number Decoding (1761-NET-AIC)

• 1761:​ Series designation (MicroLogix accessory series)

• NET-AIC:​ Product type (NET = network, AIC = Advanced Interface Converter)

Note:​ The "NET-AIC" designation specifically indicates the Advanced Interface Converter for network protocol conversion. This device is commonly used to connect Allen-Bradley DH-485 networks to standard serial devices or to convert between different serial protocols.

Key Features

• Protocol Conversion:​ Converts between DH-485 and RS-232/422/485 protocols

• Multiple Serial Standards:​ Supports RS-232, RS-422, and RS-485 interfaces

• High-Speed Operation:​ Up to 19.2K baud data rates

• Electrical Isolation:​ 500V RMS isolation between network and serial sides

• Wide Power Range:​ Accepts 24V DC or 85-265V AC power

• LED Status Indicators:​ Visual indication of power, network activity, and serial activity

• Flexible Mounting:​ DIN rail or panel mount options

• Easy Configuration:​ DIP switch configuration for baud rate and protocol settings

• Industrial Grade:​ Designed for harsh industrial environments

• Compact Design:​ Space-efficient footprint for control panel installation

• Terminal Block Connections:​ Screw terminals for reliable wiring

Communication Specifications

Typical Applications

• PLC Communication:​ Connecting MicroLogix, SLC 500, PLC-5 to computers or HMIs

• Network Bridging:​ Connecting DH-485 networks to Ethernet through serial-to-Ethernet converters

• SCADA Integration:​ Interface between DH-485 networks and SCADA systems

• HMI Connectivity:​ Connecting HMIs to Allen-Bradley DH-485 networks

• Protocol Conversion:​ Converting between different serial protocols (RS-232 to RS-485)

• Legacy System Integration:​ Connecting older Allen-Bradley equipment to modern systems

• Data Logging:​ Interface for data acquisition systems

• Programming Interface:​ Alternative programming port for DH-485 devices

• Network Isolation:​ Isolating network segments for troubleshooting or testing

Important Technical Notes

1. Network Configuration:​ DH-485 network requires proper termination (150Ω resistor) at both ends of the network. Each device requires unique node address (0-31).

2. Baud Rate Setting:​ All devices on DH-485 network must be set to same baud rate. Configure via DIP switches on AIC module.

3. Wiring:​ Use proper shielded cable for network connections. Belden 9841 or equivalent recommended for DH-485 networks.

4. Power Supply:​ Module accepts either 24V DC or 85-265V AC. Do not apply both power sources simultaneously.

5. Isolation:​ 500V isolation between network and serial sides provides protection against ground loops and electrical noise.

6. RS-232 Configuration:​ For RS-232 operation, may require null modem cable or gender changers depending on connected device.

7. RS-422/485 Configuration:​ For RS-422/485 operation, requires proper termination resistors (typically 120Ω) at both ends of network.

8. Environmental Conditions:​ Install in appropriate enclosure for protection. IP20 provides limited protection against dust and moisture.

9. Diagnostics:​ LED indicators provide basic status information. Green power LED indicates proper power. Flashing network LED indicates data activity.

Note: For complete installation guidelines, wiring diagrams, configuration instructions, and detailed technical data, consult the official Allen-Bradley 1761-NET-AIC User Manual. Always verify the exact model number configuration with the manufacturer, as notation variations may occur.