Product Overview
In demanding process control and machine monitoring applications, the Allen-Bradley 1734-IE8C delivers accurate current signal acquisition with its eight single-ended, non-isolated input channels. Part of the POINT I/O family, this Allen-Bradley 1734-IE8C analog input module converts 0-20 mA or 4-20 mA signals into 16-bit signed integer data using a delta-sigma conversion method. Its compact design and open enclosure rating make it a practical choice for distributed I/O systems where space and cost efficiency matter.
Key Features & Benefits
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Eight Inputs: 8 single-ended, non-isolated current input channels for flexible signal wiring.
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High Resolution: 16-bit resolution across 0 to 21 mA ensures precise measurement of analog signals.
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Delta-Sigma Conversion: Provides stable, accurate conversion of current inputs.
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Channel-Level Diagnostics: Real-time monitoring of each channel simplifies troubleshooting and reduces downtime.
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Scalable & Configurable: Individually configurable channels, selectable input filters, and over/under-range detection enhance system flexibility.
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Factory Calibrated: Ships ready for use; no calibration required, just proper configuration.
Technical Specifications
| Parameter |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number |
1734-IE8C |
| Series |
POINT I/O |
| Module Type |
Analog Input Module |
| Inputs |
Eight (8) single-ended, non-isolated |
| Input Conversion Type |
Sigma Delta |
| Signal Type |
Current |
| Input Signal Range |
4…20 mA, 0…20 mA |
| Input Resolution |
16 bits across 0 to 21 mA |
| Conversion Type |
Delta Sigma |
| Absolute Accuracy |
0.1% Full Scale @ 25 °C |
| Data Format |
Signed Integer |
| Channel-Level Diagnostics |
Yes |
| Resolution |
16 bits – over 0…21 mA 0.32 µA/cnt |
| UPC |
10612598347879 |
| Terminal Base |
1734-TB3, 1734-TB3S wiring base assembly |
| Power Dissipation |
0.6 W @ 28.8V DC |
| Thermal Dissipation |
2.0 BTU/hr @ 28.8V DC |
Real-World Applications
The Allen-Bradley 1734-IE8C excels in applications that require precise current monitoring, such as:
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Process Control: Monitor 4-20 mA signals from transmitters measuring pressure, flow, or temperature in chemical plants and refineries.
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Machine Monitoring: Track motor currents or hydraulic pressure in manufacturing equipment to detect anomalies early.
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Building Automation: Integrate with HVAC systems to read current signals from sensors and actuators.
Its high resolution and accuracy make it ideal for any distributed I/O setup where reliable analog data is critical.
Installation & Setup Guidance
To integrate the 1734-IE8C, you will need a compatible POINT I/O communication adapter and a 1734-TB3 or 1734-TB3S terminal base. Mount the module onto the DIN rail, connect the wiring base, and secure the module. Wire the current signals to the appropriate terminals, ensuring proper polarity. Configure the module using your PLC programming software, setting input ranges and scaling as needed. The module is factory calibrated, so no manual calibration is required—just verify the configuration matches your application.
Maintenance & Reliability
Routine maintenance for the Allen-Bradley 1734-IE8C is minimal. Periodically inspect the wiring and terminal connections for signs of corrosion or loosening. Keep the module clean and free of dust, as contamination can affect performance. The open enclosure rating means it should be installed in a clean, dry environment. With proper care, the module provides long-term reliability, reducing downtime and maintenance costs.
Compatibility & Integration
The 1734-IE8C is part of the POINT I/O system and requires a communication adapter to interface with a PLC. It works seamlessly with Rockwell Automation controllers and other systems that support POINT I/O. The module communicates via the backplane, sending 24 bytes of data (channel data and status) to the PLC memory. Ensure your adapter and controller are compatible with the 1734-IE8C before installation.
Selection Guide & Purchasing Advice
Before purchasing, verify that the 1734-IE8C matches your input signal types (0-20 mA or 4-20 mA) and that your system has an available POINT I/O slot. Confirm the terminal base model (1734-TB3 or 1734-TB3S) is included or ordered separately. Consider the power dissipation (0.6 W @ 28.8V DC) and thermal dissipation (2.0 BTU/hr) to ensure adequate cooling in your enclosure. For reliable sourcing, PLC Source PRO offers genuine Allen-Bradley 1734-IE8C modules with fast shipping and expert support.