Allen-Bradley 1734-485ASC Serial Interface Module for POINT I/O Systems

Product Introduction

In the evolving landscape of industrial automation, the need for reliable serial communication has never been greater. The Allen-Bradley 1734-485ASC serial interface module addresses this demand as part of the POINT I/O 1734 series. Designed to connect RS-422 or RS-485 networks, this module ensures stable data transmission in harsh environments. It uses shielded cables to minimize electrical noise, a common challenge in factory floors. With a voltage range of 10-28.8 volts DC and a nominal supply of 24 volts DC, it integrates seamlessly into existing systems. The 1734-485ASC is a key component for modernizing legacy serial devices.

Technical Specifications

The 1734-485ASC operates on a supply voltage of 24 volts DC nominal, drawing only 15mA at that voltage. It supports a voltage range of 10-28.8 volts DC, providing flexibility for various power sources. The module uses a key switch position of 2 for proper installation in the POINT I/O base. It is a serial interface module, not an analog or digital I/O module, focusing solely on ASCII communication over RS-422 or RS-485 networks. These specs ensure low power consumption and reliable serial connectivity.

Industry Applications

Manufacturing facilities often rely on RS-422 or RS-485 networks to connect barcode scanners, printers, and weigh scales. The 1734-485ASC bridges these ASCII devices to a DeviceNet master, enabling real-time data exchange. In a packaging line, for example, it transmits product codes from scanners to the control system, reducing downtime. Similarly, in material handling, it links serial sensors to a PLC, improving inventory tracking. Its shielded cable requirement ensures signal integrity in electrically noisy environments, a critical factor for consistent operation.

Installation & Setup Guidance

Mount the 1734-485ASC on a DIN rail within a POINT I/O system. Use shielded cables for RS-422 or RS-485 connections, grounding only one side of the shield to avoid ground loops. The module does not support a chassis ground on its removable terminal block; instead, ground the shield at the DIN rail. Connect the terminal block using the 1734-TB, following markings on the module case. Set buffer sizes to 20 bytes for transmit and receive, adjusting via configuration if needed. Ensure the key switch is at position 2 before powering up.

Maintenance & Reliability

Regularly inspect cable connections for wear or corrosion, especially in high-vibration areas. The module's low current draw of 15mA reduces heat buildup, extending its lifespan. Verify that shielded cables remain intact to prevent noise interference. Periodic checks of the DIN rail ground connection ensure consistent performance. For long-term reliability, maintain ambient conditions within the POINT I/O system's specified range. These practices minimize unexpected downtime and sustain data integrity.

Selection Guide & Purchasing Advice

Before purchasing the 1734-485ASC, confirm your network type (RS-422 4-wire or RS-485 2-wire) and verify compatibility with your DeviceNet master. Ensure you have a 1734-TB terminal block and shielded cables. For complete technical specifications, contact BluePLC Industrial. As a trusted supplier, BluePLC Industrial offers genuine Allen-Bradley modules with fast shipping. Verify current lifecycle status and availability with BluePLC Industrial before ordering to ensure seamless integration into your automation project.