Allen-Bradley 1734-IA2 POINT I/O AC Input Module

1734-IA2 Allen-Bradley 2-Channel AC Input Module

Product Introduction

The Allen-Bradley 1734-IA2 provides a compact and reliable AC input solution for the POINT I/O system. This module features two independent input channels, labeled Input 0 and Input 1, each with dedicated status indicators for quick visual diagnostics. It accepts a nominal voltage of 120 VAC with an operating range from 85 to 132 VAC at 47-63 Hz. The 1734-IA2 integrates seamlessly into the 1734 series, supporting popular networks like EtherNet/IP, ControlNet, and DeviceNet. Its ultra-compact design, measuring just 56.0 x 12.0 x 75.5 mm, allows flexible installation in space-constrained cabinets.

Technical Specifications

Input Characteristics
The 1734-IA2 offers two AC input channels in a single group. Each channel operates at 120 VAC nominal, with a voltage range of 85 to 132 VAC at 47-63 Hz. The nominal input impedance measures 10.6 kiloohms, ensuring minimal current draw from the field devices. The ON-state input current is approximately 11.3 mA at 120 VAC. The OFF-state leakage current remains low, preventing false triggering. Each input provides a status LED that illuminates when the channel is energized.

Isolation and Protection
This input module delivers robust isolation for reliable operation. It provides 240 VAC continuous isolation between the field inputs and the backplane. Furthermore, the 1734-IA2 is tested to withstand 3250 VDC for 60 seconds, ensuring safe operation in industrial environments. This high isolation rating protects the control system from voltage transients and electrical noise on the field wiring.

Power Consumption
The 1734-IA2 draws only 75 mA from the POINTBus at 5 VDC. Its power dissipation is just 0.35 W at 132 VAC, with thermal dissipation of 1.19 BTU/hour. These low power figures make it an energy-efficient choice for distributed I/O applications.

Network Compatibility
The 1734-IA2 supports multiple network protocols, including EtherNet/IP, ControlNet, and DeviceNet. This flexibility allows seamless integration into various Rockwell Automation architectures. The module communicates with the POINTBus backplane for data exchange with the controller.

Mechanical and Environmental Parameters

Physical Dimensions
The 1734-IA2 has a compact footprint of 56.0 mm x 12.0 mm x 75.5 mm (height x width x depth). It weighs approximately 30.9 grams (1.09 ounces). This small size allows high-density mounting in control cabinets.

Mounting Flexibility
You can install this module in either horizontal or vertical orientation. This flexibility accommodates various cabinet layouts and space constraints. The open-style enclosure design facilitates heat dissipation and simplifies access.

Environmental Ratings
The 1734-IA2 operates reliably in a wide temperature range from -20 °C to 55 °C (-4 °F to 131 °F). It tolerates relative humidity between 5% and 95%, non-condensing. These environmental specifications suit demanding industrial environments.

Key Switch Positions
This module includes eight key switch positions. These positions prevent incorrect insertion of the module into the wrong slot, ensuring proper system configuration.

Installation and Integration Guide

Mounting Procedure
First, mount the POINT I/O base or terminal base on the DIN rail. Next, align the 1734-IA2 with the base unit and snap it firmly into place. The module clicks securely onto the base, ensuring proper electrical connection. No tools are required for module installation.

Wiring Connections
Connect your AC input devices to the appropriate terminals on the base unit. Each input channel has two terminals: one for the line (L) connection and one for the neutral (N) connection. Use the 120 VAC supply from the field devices. Ensure proper grounding and shielding practices to minimize noise. The color-coded terminal blocks simplify wiring and reduce errors.

System Configuration
The 1734-IA2 automatically communicates with the POINT I/O adapter or controller via the POINTBus backplane. Use Rockwell Automation's software, such as RSLogix 5000 or Studio 5000, to configure the module. The two input channels map to specific bits in the input image table. You can monitor input states using the front panel LEDs for quick diagnostics.

Network Integration
Depending on your network adapter, the 1734-IA2 supports EtherNet/IP, ControlNet, or DeviceNet. The module transmits input data to the controller via the chosen network. This flexibility enables distributed I/O architectures with centralized control.

Packaging List

• Allen-Bradley 1734-IA2 Digital AC Input Module (1 unit)

• Module mounting instructions

Note: Terminal base units (1734-TB or 1734-TBS) are sold separately. Cables, network adapters, and programming software are not included.

Shipping Information

All orders ship via FedEx, UPS, or DHL with tracking numbers provided. Please ensure your shipping address and contact details are correct for prompt delivery.

Frequently Asked Questions

1. Can I use the 1734-IA2 with 240 VAC input signals?
No, the 1734-IA2 is designed for 120 VAC nominal input (85-132 VAC range). For 240 VAC applications, consider the 1734-IA4 or other 240 VAC-rated modules.

2. Does the 1734-IA2 require an external power supply?
No, this module derives its power from the POINTBus backplane, which draws 75 mA at 5 VDC. No external power supply is needed for the module itself. However, field input devices require their own AC power source.

3. What networks are compatible with this module?
The 1734-IA2 supports EtherNet/IP, ControlNet, and DeviceNet networks. It communicates with the controller through a compatible POINT I/O adapter, such as the 1734-AENT for EtherNet/IP.

4. How do I know if an input is active?
Each of the two input channels on the 1734-IA2 has a dedicated green LED status indicator. The LED illuminates when the corresponding input is energized, providing immediate visual feedback.

5. Can I install the 1734-IA2 in a vertical orientation?
Yes, the 1734-IA2 supports both horizontal and vertical installation. Its compact design and open-style enclosure allow flexible mounting to suit your cabinet layout.