Allen-Bradley 1734-IM4 Input Module | 4-Channel AC

Allen-Bradley 1734-IM4 Digital AC Input Module

Product Introduction

The Allen-Bradley 1734-IM4 is a 4-channel Digital AC Input Module within the POINT I/O family. It offers 4 non-isolated sinking inputs in a single group, providing efficient high-voltage AC sensing for multiple field devices. This module operates at a nominal voltage of 220 Volts AC, with a wide acceptable range from 159 to 264 Volts AC. Additionally, it features programmable digital filtering, allowing users to customize input delay from 1 to 65.535 milliseconds. The 1734-IM4 delivers reliable performance in space-constrained control cabinets while supporting diverse AC input applications.

Technical Specifications

Input Voltage and Current Ratings

The 1734-IM4 accepts an input voltage range of 159 to 264 Volts AC at 47 to 63 Hertz, with a nominal rating of 220 Volts AC at 60 Hertz. Its on-state current varies from a minimum of 6.2 mA at 159 Volts AC to a maximum of 10.2 mA at 264 Volts AC. The nominal input impedance is rated at 22.3 kiloohms. Furthermore, the module provides continuous isolation voltage of 240 Volts from the field side to the system. This isolation ensures safe operation when monitoring high-voltage AC signals from motors, contactors, and other industrial equipment.

Input Filtering and Response Time

The 1734-IM4 features dual-stage input filtering for enhanced noise immunity. The hardware filter provides a fixed delay of 20 milliseconds for both ON-to-OFF and OFF-to-ON transitions. Additionally, a programmable digital filter offers adjustable delay from 1 to 65.535 milliseconds, configurable in 1-millisecond increments. This programmable filter allows engineers to tailor the module's response to specific application requirements. For instance, longer filter settings help reject electrical noise in electrically noisy environments, while shorter settings enable faster response in high-speed applications.

Power and Thermal Ratings

This module draws a maximum POINTbus current of 75 mA at 5 Volts DC. Its maximum power dissipation reaches 0.80 Watts at 264 Volts AC, with a corresponding thermal dissipation of 2.73 BTU/hour. At its rated load, the 1734-IM4 dissipates just 0.1 Watts maximum, making it highly energy-efficient. This low power consumption reduces heat accumulation within the control enclosure, contributing to long-term system reliability. The module's efficient design also minimizes the load on the POINTbus power supply, allowing more modules per system.

Input Configuration and Channel Assignment

The 1734-IM4 provides 4 non-isolated sinking inputs, organized as a single group of 4. Input channels are labeled from 0 to 3 for easy identification. Each channel features a dedicated status indicator, allowing operators to monitor individual input states in real time. The module requires a keyswitch position of 8 on the mounting base. Compatible wiring bases include the 1734-TB, 1734-TBS, 1734-TOP, and 1734-TOPS terminal base units. Users should rotate the keyswitch to position 8 before installing the module to ensure proper system configuration.

Status Indicators and Diagnostics

The 1734-IM4 features comprehensive status indicators for efficient diagnostics. One red/green indicator displays the module status, while another shows network status. Four additional yellow indicators monitor each input channel (0 through 3). When an input is active, its corresponding indicator illuminates, providing immediate visual feedback. This diagnostic capability significantly reduces troubleshooting time and simplifies system maintenance. Operators can quickly verify input states without using additional testing equipment or software tools.

Mechanical and Environmental Specifications

The 1734-IM4 measures 2.21 x 0.47 x 2.97 inches and weighs approximately 1.09 ounces (30.9 grams). Its operating temperature spans -20 to 55 degrees Celsius, while its non-operating range extends from -40 to 85 degrees Celsius. The module withstands non-condensing relative humidity from 5% to 95%. It also handles operating vibration of 5 g at 10 to 500 Hertz, along with an operating shock rating of 30 g and a non-operating shock rating of 50 g. These rugged specifications make the Allen-Bradley 1734-IM4 suitable for demanding industrial environments.

Installation and Mounting Guidance

Mounting Options

The 1734-IM4 supports DIN rail mounting for straightforward installation. Simply snap the module onto the rail after attaching it to a compatible wiring base. Suitable bases include the 1734-TB, 1734-TBS, 1734-TOP, and 1734-TOPS models. Ensure the keyswitch on the mounting base is rotated to position 8 before installing the module. This step is essential for correct module identification within the POINT I/O system. The open-style enclosure provides easy access during wiring and maintenance activities.

Wiring Requirements

This module accepts solid or stranded copper wire ranging from 14 to 22 AWG. All field wiring must be rated at 75 degrees Celsius minimum. The 1734-IM4 uses 4 non-isolated sinking inputs, so proper grounding practices are important for reliable operation. Connect each AC input signal to the corresponding terminal on the selected wiring base. Double-check all connections before applying power to prevent damage to the module or connected equipment.

System Integration

The 1734-IM4 integrates seamlessly into any POINT I/O system. It communicates via the POINTbus backplane, requiring a maximum current of 75 mA at 5 Volts DC. This low bus current draw allows engineers to power more modules from a single supply. The module works with various Rockwell Automation controllers, including ControlLogix and CompactLogix platforms. Its 4-channel design makes it ideal for applications requiring multiple AC inputs in a compact footprint.

Application Scenarios

The Allen-Bradley 1734-IM4 excels in applications requiring multiple high-voltage AC sensing points. Typical uses include monitoring motor starter status, sensing AC power presence across multiple circuits, and detecting the state of AC-powered limit switches and proximity sensors. It also performs well in conveyor systems, packaging machinery, and HVAC control applications. The programmable digital filtering feature makes it particularly valuable in electrically noisy environments where false triggering must be minimized. Furthermore, the module's compact size makes it ideal for retrofit projects with limited panel space.

Packaging List

Each shipment of the Allen-Bradley 1734-IM4 includes the following items:

• One 1734-IM4 Digital AC Input Module

• One mounting bracket (pre-installed)

• One installation instructions document

Please note that wiring bases (1734-TB, 1734-TBS, 1734-TOP, or 1734-TOPS) are not included and must be ordered separately. All components are packaged in anti-static material for safe transit.

Shipping Information

We ship all orders via FedEx, UPS, or DHL. Standard delivery typically takes 3 to 5 business days depending on your location. Expedited shipping options are available upon request. Every shipment includes full tracking and insurance coverage. Contact our sales team for detailed shipping quotes and estimated delivery timelines.

Frequently Asked Questions

Q1: What keyswitch position does the 1734-IM4 require?
A1: The 1734-IM4 requires the keyswitch on the mounting base to be rotated to position 8. Verify this setting before module installation.

Q2: Which wiring bases work with the 1734-IM4?
A2: The 1734-IM4 is compatible with the 1734-TB, 1734-TBS, 1734-TOP, and 1734-TOPS terminal base units. Select the base that suits your wiring needs.

Q3: What is the input voltage range for the 1734-IM4?
A3: The 1734-IM4 accepts AC voltages from 159 to 264 Volts AC at 47 to 63 Hertz, with a nominal rating of 220 Volts AC.

Q4: Can I adjust the input filter time on the 1734-IM4?
A4: Yes, the 1734-IM4 features a programmable digital filter from 1 to 65.535 milliseconds in 1-millisecond increments, in addition to a 20-millisecond hardware filter.

Q5: How many input channels does the 1734-IM4 provide?
A5: The 1734-IM4 provides 4 non-isolated sinking inputs, organized as a single group of 4. Each channel has its own status indicator for easy monitoring.