1734-IE2C | Allen-Bradley Analog Input Module Supplier

Introduction: The 1734-IE2C in Modern Automation

As industrial processes evolve, the demand for accurate current signal acquisition grows. The 1734-IE2C from Allen-Bradley addresses this need with two single-ended, non-isolated input channels. Part of the POINT I/O series, this analog input module converts 0-20 mA or 4-20 mA signals into digital values with 16-bit resolution. Engineers rely on it for precise monitoring in control systems.

Key Features & Technical Specs

• Resolution: 16 bits over 0...21 mA at 0.32 μA/cnt ensures fine granularity.
• Absolute Accuracy: 0.1% Full Scale @ 25 °C provides reliable measurements.
• Input Step Response: 80 ms @ 50 Hz, 70 ms @ 60 Hz (default), 16 ms @ 250 Hz, 8 ms @ 500 Hz per channel.
• Input Update Rate: 120 ms @ 50 Hz, 100 ms @ 60 Hz (default), 24 ms @ 250 Hz, 12 ms @ 500 Hz per module.
• Current Draw: 75 mA at 5V DC.
• Power Dissipation: 0.6 W at 28.8V DC.
• Dimensions: 56 x 12 x 75.5 mm (2.2 x 0.47 x 2.97 in).
• Conversion Type: Delta Sigma for stable analog-to-digital conversion.
• Data Format: Signed Integer.
• Calibration: Factory calibrated for consistent performance.

One distinctive spec is the 16-bit resolution over 0...21 mA. This allows detection of minute current changes, improving process control in applications requiring high sensitivity.

Applications & Use Cases

In manufacturing, the 1734-IE2C monitors current signals from sensors such as pressure transmitters and flow meters. For example, in a water treatment facility, it reads 4-20 mA signals from level sensors to maintain tank levels. Its compact dimensions (56 x 12 x 75.5 mm) enable installation in space-constrained cabinets. Additionally, the module supports vertical or horizontal mounting on a 35 mm DIN rail.

Installation & Setup

Mount the 1734-IE2C onto a compatible wiring base: 1734-TB, 1734-TBS, 1734-TOP, or 1734-TOPS. Set the keyswitch to position 3 before securing the module. Use 22 to 14 AWG shielded copper wire for input signals. Ensure the external DC power supply provides 10 to 28.8V DC. The module draws 75 mA at 5V DC, so verify your power budget.

Maintenance & Reliability

With an open-style enclosure, the 1734-IE2C requires a clean, dry environment. Periodically inspect wiring connections for tightness and check for any signs of corrosion. The factory calibration eliminates the need for initial adjustment. For long-term reliability, follow the manufacturer's guidelines for periodic verification of accuracy.

Compatibility & Integration

The 1734-IE2C works with any POINT I/O communication adapter, supporting networks such as ControlNet, DeviceNet, and EtherNet/IP. It integrates seamlessly with Allen-Bradley controllers, including CompactLogix and ControlLogix platforms. This flexibility makes it suitable for both new installations and upgrades.

Troubleshooting & Common Issues

If the module does not communicate, verify the keyswitch is at position 3 and the terminal base is properly seated. Check the power supply voltage (10 to 28.8V DC) and current draw (75 mA at 5V DC). For inaccurate readings, confirm the input signal is within 0-20 mA or 4-20 mA range and that the wiring uses shielded cable. Refer to the official Allen-Bradley documentation for detailed diagnostics.

FAQ about 1734-IE2C

Q: What is the resolution of the 1734-IE2C?

A: It offers 16-bit resolution over 0...21 mA at 0.32 μA/cnt.

Q: What input signals does the 1734-IE2C accept?

A: It accepts 0-20 mA and 4-20 mA current signals.

Q: What is the power dissipation of the 1734-IE2C?

A: It dissipates 0.6 W at 28.8V DC.

Q: What terminal bases are compatible with the 1734-IE2C?

A: Compatible bases include 1734-TB, 1734-TBS, 1734-TOP, and 1734-TOPS.

Q: Does the 1734-IE2C require calibration?

A: It is factory calibrated and does not require initial calibration.

Product Support & Availability

The 1734-IE2C is available from Petro Auto Tech. In stock and ready to ship, it comes with full manufacturer support. Contact Petro Auto Tech for pricing and delivery options.