Allen-Bradley 1734-232ASC Point I/O RS-232 ASCII Module

Configured for serial data transmission in Point I/O 1734 backplane environments, the Allen-Bradley 1734-232ASC (1734-232ASC ASCII Module) provides direct physical/electrical execution. The module manages full-duplex ASCII character communication over RS-232 serial interfaces, transferring structured data strings directly into controller I/O memory tags without requiring external signal conversion hardware.

Hardware Specifications

Industrial Control & Backplane Communication Properties

As a specialized serial interface unit within Allen-Bradley control architectures, the 1734-232ASC delivers hardware-level data stream management and backplane integration:

• Backplane Bus Communication Velocity: Low-latency Pointbus backplane connections enable rapid transmission of ASCII byte streams directly to primary logix processors across deterministic EtherNet/IP networks.
• Firmware Flash Compatibility: Internal flash memory supports seamless hardware execution across dynamic controller firmware updates, preserving baud rate and framing parameters stored in non-volatile memory.
• I/O Density Scaling: Integrates a full-duplex RS-232 channel into an ultra-compact Point I/O footprint, expanding serial communication capacity without consuming excess panel space.

Frequently Asked Questions

Q: What is the backplane current draw for the 1734-232ASC module?

A: The module draws 75 mA at 5 VDC from the internal Pointbus backplane power rail.

Q: What isolation rating does the module provide between field wiring and system logic?

A: The module provides galvanic isolation rated at 2200 VDC for 60 seconds between the field-side RS-232 interface and the Pointbus logic backplane.

Q: What keying setting is required on the terminal base prior to insertion?

A: The mechanical keyswitch on the 1734 mounting base must be rotated to Position 2 (Specialty Module) before inserting the 1734-232ASC.

Field Installation Guidelines

Adherence to standard physical installation and wiring protocols maintains continuous signal throughput and prevents electromagnetic corruption:

• Mechanical Assembly and Keying: Set the terminal base keyswitch to Position 2. Snap the mounting base onto the 35 mm DIN rail and press the 1734-232ASC removable terminal block into place until locked.
• Field Cabling and Shielding: All RS-232 connections must utilize high-quality shielded cable. Connect the cable shield to a single earth ground point on the system chassis to prevent ground loops from corrupting high-speed serial data frames.
• Conductor Segregation: Maintain physical separation between serial data lines and high-voltage AC lines or motor leads within cable trays to minimize electromagnetic noise coupling.