Product Introduction
When electrical noise threatens to disrupt serial communication in industrial environments, the Allen-Bradley 1734-485ASC Serial Interface Module provides a reliable solution. Designed as part of the POINT I/O 1734 series, this module enables seamless ASCII data exchange between a DeviceNet master and RS-485 or RS-422 serial devices. Its compact form factor and robust construction make it an ideal choice for demanding automation applications.
Technical Specifications
Below are the key parameters for the Allen-Bradley 1734-485ASC module, sourced directly from the manufacturer's data.
| Specification |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number |
1734-485ASC |
| Series |
POINT I/O |
| Module Type |
Serial Interface Module |
| Key Switch Position |
2 |
| Voltage Range |
10-28.8 V DC |
| Supply Voltage |
24 V DC nominal |
| Supply Current |
15 mA at 24 V DC |
| UPC |
10612598283702 |
The 1734-485ASC operates within a wide voltage range of 10-28.8 V DC, ensuring compatibility with various power supplies. Its nominal 24 V DC supply and low current draw of 15 mA make it energy-efficient and easy to integrate.
Industry Applications
The Allen-Bradley 1734-485ASC module is widely used in manufacturing, process control, and material handling systems where ASCII-based devices such as barcode scanners, weigh scales, and printers require serial connectivity. For example, in a packaging line, the module can transmit product data from a scanner to a PLC, enabling real-time tracking and quality control. Its support for both RS-485 (2-wire) and RS-422 (4-wire) networks offers flexibility in system design.
Installation & Setup Guidance
When installing the 1734-485ASC, use shielded cables to minimize electrical noise. Ground only one end of the shield to avoid ground loops. Note that this module does not support a chassis ground connection on its removable terminal block; instead, connect the shield to the DIN rail. Wire the RS-485 or RS-422 connections to the appropriate terminals on the 1734-TB terminal block, following the markings on the module case. Configure the ASCII buffer sizes (default 20 bytes for transmit and receive) in the configuration file if larger data packets are needed.
Maintenance & Reliability
Regular inspection of cable connections and shield grounding is recommended to maintain signal integrity. Check for signs of wear on cables and connectors, and ensure the DIN rail mounting is secure. Because the module draws minimal current, it generates little heat, reducing thermal stress. Proper shielding and grounding practices will extend the service life of the 1734-485ASC and prevent communication errors.
Compatibility & Integration
The 1734-485ASC is designed to work with Rockwell Automation's POINT I/O system, integrating seamlessly with ControlLogix, CompactLogix, and other DeviceNet-capable controllers. It supports ASCII devices using RS-232, RS-485, or RS-422 protocols, making it a versatile bridge between DeviceNet and serial devices. Ensure your controller firmware supports POINT I/O modules for optimal performance.
Selection Guide & Purchasing Advice
Before purchasing the 1734-485ASC, verify your network topology (RS-485 or RS-422) and confirm the required buffer sizes. Consider the number of serial devices and distance limitations. PLC Source PRO offers genuine Allen-Bradley modules with fast shipping and competitive pricing, ensuring your automation projects stay on schedule.