Allen-Bradley 1734-IE8C Analog Input Module 8-Channel

Product Introduction

The Allen-Bradley 1734-IE8C is a high-density Analog Input Module designed for the POINT I/O family. This module features eight single-ended, non-isolated current input channels. It accepts standard 0-20 mA or 4-20 mA signals from field transmitters and sensors. Furthermore, its 16-bit resolution ensures precise measurement across the full signal range. The module uses a delta-sigma conversion type for accurate, noise-resistant data acquisition. Additionally, each channel is individually configurable, offering exceptional flexibility for diverse automation needs. Overall, the 1734-IE8C is an ideal solution for cost-effective, distributed I/O systems requiring multiple analog inputs.

Technical Specifications

This section details the core technical capabilities of the 1734-IE8C module.

Input Characteristics

The 1734-IE8C provides eight single-ended current input channels. Specifically, each channel accepts either 0-20 mA or 4-20 mA signals. Therefore, you can connect a wide variety of transmitters, including pressure, temperature, and flow sensors. Moreover, the input range extends from 0 to 21 mA, allowing for overrange detection. The input impedance is 60 Ohms, which minimizes loading effects on your field devices. Consequently, this module ensures accurate signal acquisition without disturbing the measurement loop.

• Inputs: Eight (8) single-ended, non-isolated

• Signal Type: Current

• Input Signal Range: 4-20 mA or 0-20 mA

• Input Impedance: 60 Ohms

• Input Conversion Type: Delta-Sigma

Resolution and Accuracy

The 1734-IE8C delivers exceptional measurement precision. Its 16-bit resolution spans the 0-21 mA range, providing a granularity of 0.32 µA per count. Furthermore, the absolute accuracy is 0.1% of full scale at 25 °C (77 °F). This high accuracy makes the module suitable for demanding process control applications. Meanwhile, the delta-sigma conversion technology effectively rejects electrical noise, ensuring stable readings even in industrial environments. Therefore, you can trust the data from the 1734-IE8C for critical monitoring and control tasks.

• Resolution: 16 bits over 0-21 mA (0.32 µA/cnt)

• Absolute Accuracy: 0.1% Full Scale @ 25 °C

• Data Format: Signed Integer

Channel Configuration and Diagnostics

Each channel on the 1734-IE8C is independently configurable. For instance, you can set different input ranges and filter settings per channel. Additionally, the module supports scaling to various engineering units, simplifying integration with your control system. The on-board diagnostics provide channel-level status monitoring. Specifically, overrange and underrange detection functions alert you to signal faults. Furthermore, channel-level data alarming helps you identify process deviations quickly. Altogether, these features enhance system reliability and reduce troubleshooting time.

Power and Thermal Specifications

The 1734-IE8C operates with low power consumption. Its power dissipation is only 0.6 W at 28.8V DC. Likewise, the thermal dissipation is 2.0 BTU/hr at 28.8V DC. This low heat output allows for dense module mounting within your control cabinet. Meanwhile, the open enclosure type rating ensures adequate airflow for cooling. Therefore, you can install multiple modules without excessive heat buildup concerns.

• Power Dissipation: 0.6 W @ 28.8V DC

• Thermal Dissipation: 2.0 BTU/hr @ 28.8V DC

• Enclosure Type: Open style

Supported Terminal Bases

The 1734-IE8C requires a compatible wiring base assembly for installation. Specifically, the module works with the 1734-TB3 or 1734-TB3S terminal bases. These bases provide the physical connection points for field wiring. Additionally, they supply power to the module through the backplane. Therefore, ensure you select the correct terminal base for your system configuration. Proper base selection ensures reliable electrical connections and mechanical support.

System Integration Requirements

The 1734-IE8C is a POINT I/O module that requires a communication adapter to function. Specifically, the module will not operate without an appropriate POINT I/O communication adapter installed. Therefore, you must integrate it with a suitable adapter, such as the 1734-ENT, 1734-ADN, or other compatible options. The adapter handles communication between the module and the controller. Meanwhile, the module creates 24 bytes of data tables within the PLC's memory. These tables contain channel data and status information for channels 0 through 7. Consequently, proper configuration ensures seamless data exchange within your control system.

Mechanical and Environmental Parameters

The 1734-IE8C is built for reliable operation in industrial environments. Its compact design saves valuable panel space. Furthermore, the module is robust enough for typical factory conditions.

• Mounting: DIN rail mountable

• Enclosure Type: Open style

• Operating Temperature: -20 to 55 °C (-4 to 131 °F)

• Storage Temperature: -40 to 85 °C (-40 to 185 °F)

• Relative Humidity: 5 to 95% (non-condensing)

Calibration and Configuration

The 1734-IE8C is factory calibrated, eliminating the need for field calibration. However, proper configuration is essential for optimal operation. You must set the input range and scaling parameters using your configuration software. Additionally, you can enable or disable diagnostics and alarming features per channel. Since the module uses signed integer data format, ensure your PLC program interprets the data correctly. Overall, the configuration process is straightforward and well-supported by Rockwell Automation's software tools.

Installation Guidelines

Proper installation of the 1734-IE8C ensures reliable and accurate operation. First, mount the appropriate terminal base (1734-TB3 or 1734-TB3S) onto the DIN rail. Next, snap the module onto the terminal base until it locks securely. Then, connect your field wiring to the terminal base following the wiring diagram. After wiring, configure the module using your software tool. Finally, verify all connections and apply power to the system. Additionally, always power down the system before installation or removal to protect both personnel and equipment.

Packaging List

When you receive your new 1734-IE8C, the package will contain the following items. Please inspect the contents upon delivery.

• 1 x Allen-Bradley 1734-IE8C Analog Input Module

• 1 x Installation instructions sheet

Note: The module ships as a single unit. The terminal base (1734-TB3 or 1734-TB3S) is ordered separately. No interconnecting cables or additional accessories are provided.

Shipping Information
We ship all orders using premium, trackable carriers such as Fedex, UPS, and DHL. A tracking number will be emailed to you promptly after dispatch.

Frequently Asked Questions (FAQ)

Q1: Does the 1734-IE8C module support voltage inputs?
A1: No, the 1734-IE8C is specifically designed for current inputs only. It accepts either 0-20 mA or 4-20 mA signals. For voltage input applications, please consider other POINT I/O analog input modules.

Q2: What terminal base is required for the 1734-IE8C?
A2: The 1734-IE8C requires either the 1734-TB3 or 1734-TB3S wiring base assembly. These bases provide the mechanical support and electrical connections for the module. Ensure you order the appropriate base separately.

Q3: Can I configure each channel independently on the 1734-IE8C?
A3: Yes, each of the eight channels on the 1734-IE8C is individually configurable. You can set different input ranges and filter settings per channel using the configuration software.

Q4: Does the 1734-IE8C require field calibration?
A4: No, the 1734-IE8C is factory calibrated and does not require any field calibration. However, you must properly configure the module's data parameters for correct operation within your control system.

Q5: Can the 1734-IE8C operate without a communication adapter?
A5: No, the 1734-IE8C will not operate without an appropriate POINT I/O communication adapter installed. The adapter is essential for communication between the module and your PLC or controller.