Allen-Bradley 1734-IE2C POINT I/O Analog Input Module Overview

What Is the Allen-Bradley 1734-IE2C?

Struggling to integrate precise current measurement into your distributed control system? The Allen-Bradley 1734-IE2C analog input module delivers reliable 2-channel current sensing for POINT I/O architectures. This module converts analog current signals (0-20 mA or 4-20 mA) into digital values with 16-bit resolution, making it a key component for accurate process monitoring in industrial automation.

Technical Specifications Breakdown

The 1734-IE2C features two single-ended, non-isolated current input channels. Each channel supports 0-20 mA and 4-20 mA signals with 16-bit resolution across a 0 to 21 mA range (0.32 μA/count). Absolute accuracy is rated at 0.1% Full Scale at 25 °C, with a delta-sigma conversion type for stable readings. The module draws 75 mA at 5V DC and dissipates 0.6 W at 28.8V DC. Input step response varies by notch filter setting: 80 ms at 50 Hz, 70 ms at 60 Hz (default), 16 ms at 250 Hz, and 8 ms at 500 Hz. Update rates per module are 120 ms at 50 Hz, 100 ms at 60 Hz, 24 ms at 250 Hz, and 12 ms at 500 Hz. The module is factory calibrated and uses signed integer data format.

Industry Applications

In process industries like water treatment or chemical manufacturing, the 1734-IE2C monitors 4-20 mA loop-powered sensors for flow, pressure, or level. Its 16-bit resolution ensures fine granularity for precise control loops. For example, a wastewater plant can use the module to read level transmitters and adjust pump speeds accordingly, reducing energy costs and improving reliability. The module's compact dimensions (56 x 12 x 75.5 mm) fit easily into crowded cabinets.

Installation & Setup Guidance

Mount the 1734-IE2C onto a compatible terminal base (1734-TB, 1734-TBS, 1734-TOP, or 1734-TOPS) with the keyswitch set to position 3. Use 22 to 14 AWG shielded copper wire for input signals. The module supports vertical or horizontal mounting on a standard 35 mm DIN rail. Connect an external DC power supply rated 10 to 28.8V DC (10 mA current draw). Ensure proper grounding per manufacturer guidelines to minimize noise.

Maintenance & Reliability

With no moving parts and an open-style enclosure, the 1734-IE2C requires minimal maintenance. Periodic inspection of wiring connections and module seating is recommended. The module is fault-protected up to 28.8V DC, safeguarding against overvoltage events. Its factory calibration ensures long-term accuracy drift of 30 ppm/°C, reducing the need for frequent recalibration.

Compatibility & Integration

The 1734-IE2C works with any POINT I/O communication adapter, supporting networks like ControlNet, DeviceNet, and EtherNet/IP. It integrates seamlessly with Allen-Bradley Logix controllers, including CompactLogix and ControlLogix platforms. This flexibility allows the module to fit into both new and existing automation architectures.

Selection Guide & Purchasing Advice

Before ordering, verify that your system uses POINT I/O and that the terminal base matches the module. The 1734-IE2C is a current input module — not for voltage signals. Contact BluePLC Industrial for current lifecycle status and availability. Our team can help confirm compatibility and recommend the right communication adapter for your network.