Overview
The Allen-Bradley 1794-IE8 Series B is a high-density analog input module engineered for the FLEX I/O distributed I/O platform. This sealed module captures single-ended analog signals from field devices (sensors, transducers, instrumentation) and converts them into digital data readable by ControlLogix, CompactLogix, and other Rockwell controllers. With eight independent input channels and precision signal conditioning, the 1794-IE8 delivers accurate measurements in cabinet-mounted or remote I/O assemblies.
Key Features
- 8 Single-Ended Analog Inputs — Non-isolated channels measure voltage or current signals
- 12-Bit Resolution (Unipolar) / 11-Bit + Sign (Bipolar) — Precise signal capture for process monitoring and control
- Fast Conversion Rate — 256 microseconds per channel for responsive analog data acquisition
- Flexible Input Ranges — Supports 0-20 mA, 4-20 mA, 0-10 V, and ±10 V user-configurable
- 24V DC Power — Low-power design draws only 60 mA at 24V DC nominal (19.2–31.2V DC operating range)
- Sealed Enclosure — Environmental protection from dust, moisture, and contaminants
- DIN-Rail / Panel Mount — Screw terminal connections for field wiring; integrates into compact FLEX I/O racks
Technical Specifications
- Module Type: FLEX I/O Analog Input, Series B
- Input Channels: 8 single-ended, non-isolated
- Resolution: 12 bits (unipolar); 11 bits plus sign (bipolar)
- Data Format: Left-justified 16-bit 2’s complement
- Conversion Rate: 256 microseconds all channels
- Input Current Range: 0-20 mA, 4-20 mA (user-configurable)
- Input Voltage Range: 0-10 V, ±10 V (user-configurable)
- Supply Voltage: 24V DC nominal (19.2–31.2V DC with 5% AC ripple)
- Supply Current: 60 mA @ 24V DC + 15 mA @ 5V DC FlexBus
- Operating Temperature: 0–55°C (32–131°F)
- Connection: Screw terminal (use 1794-TB2 or 1794-TB3 terminal base)
- Mounting: DIN-rail, panel; compact open-frame enclosure
- Certifications: UL, CSA, CUL, CE, C-TICK, GOST, KC, MARINE
- Weight: 0.3 lb
- Calibration: No calibration required
Typical Applications
- Process control and monitoring (temperature, pressure, flow, level)
- Machine condition monitoring and predictive maintenance
- Distributed analog signal acquisition in industrial facilities
- Sensor integration in food, beverage, automotive, and chemical manufacturing
- Environmental monitoring and HVAC systems
- Motion control feedback and performance telemetry
Compatibility & Replacements
Compatible With
- ControlLogix and CompactLogix programmable controllers
- FLEX I/O distributed I/O architecture and terminal base units (1794-TB2, 1794-TB3)
- Studio 5000 (RSLogix 5000) development environment
- EtherNet/IP networks via gateway modules
- Any Rockwell automation system supporting FLEX I/O modules
Replaces / Drop-In Replacement For
- Allen-Bradley 1794-IE8 Series A (earlier generation; Series B offers improved performance)
- Verify compatibility with your system integrator before ordering — some applications may require firmware updates
Works With
- Studio 5000 (RSLogix 5000) and FactoryTalk software
- EtherNet/IP protocol communications
- FlexLogix platform and modular I/O rack systems
- 1794-TB2 and 1794-TB3 terminal base units for field wiring
