Allen-Bradley 1734-485ASC Serial Module | POINT I/O Interface
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Allen-Bradley 1734-485ASC Serial Interface Module Introduction
The Allen-Bradley 1734-485ASC is a robust Serial Interface Module from Rockwell Automation's POINT I/O series. This module provides a vital DeviceNet interface for connecting to various ASCII devices over RS-485 or RS-422 networks. For complete installation and configuration details, we highly recommend downloading the official product manual. Download the POINT I/O ASCII Modules Manual Here
Technical Specifications
- Brand: Allen-Bradley / Rockwell Automation
- Model / Catalog Number: 1734-485ASC
- Series: POINT I/O
- Module Type: Serial Interface Module
- Voltage Range: 10 to 28.8 Volts DC
- Nominal Supply Voltage: 24 Volts DC
- Supply Current: 15mA at 24V DC
- Key Switch Position: 2
- Network Support: RS-485 (2-wire) and RS-422 (4-wire)
Installation and Wiring Guidelines
- Always use shielded communication cables to protect signal integrity.
- Ground the cable shield at only one end to prevent ground loop faults.
- Connect the shield directly to the DIN rail, not the terminal block.
- The removable terminal block on the 1734-485ASC does not support a chassis ground connection.
- Make all wiring connections to the designated points on the 1734-TB terminal block.
Configuration and Data Handling
- You must set up the ASCII module's buffer sizes after powering the device.
- The default buffer size for both receiving and transmitting is 20 bytes.
- You can modify the buffer size in the configuration file for larger data packets.
- The module sends data to the serial device only after meeting specific conditions.
- It transfers data when it reaches the defined buffer length or detects an end-of-string terminator.
Packaging and Shipping
- Each unit comes securely packaged with the 1734-485ASC module.
- We ship all orders via reliable global carriers like FedEx, UPS, and DHL.
Frequently Asked Questions (FAQ)
- What networks does this module support?
- It supports both RS-485 (2-wire) and RS-422 (4-wire) networks.
- How should I ground the shield?
- Ground the cable shield at the DIN rail only, not at both ends.
- Can I change the data buffer size?
- Yes, you can reconfigure the I/O message and buffer sizes from their defaults.
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