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Allen-Bradley 1794-IE8 Flex I/O Analog Input Module

Allen-Bradley 1794-IE8 Flex I/O Analog Input Module

Series#: AllenBradley

Product Details

1794-IE8 Allen-Bradley FLEX I/O Analog Input Module – High-performance 8-channel solution for precise industrial signal acquisition.
Accepts 4-20 mA, 0-10V DC, and other standard analog signals with 16-bit resolution for accurate data conversion.
Hot-swappable design with integrated terminal base (1794-TB) for easy installation and reduced downtime.
Backplane communication via Allen-Bradley FLEX I/O bus, compatible with ControlLogix, CompactLogix, and SLC 500 platforms.
Robust industrial-grade construction with -20°C to +60°C operating range and high noise immunity.
Guaranteed 100% Original factory condition, offering fast and secure worldwide delivery.

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Specification

Datasheet (PDF)

The Allen-Bradley 1794-IE8 FLEX I/O Analog Input Module is a cornerstone component for distributed control systems, offering eight individually configurable analog input channels. Designed for seamless integration into Rockwell Automation architectures, this module supports both current and voltage inputs, including 4-20 mA, 0-20 mA, 0-5V DC, 1-5V DC, and 0-10V DC, with a 16-bit resolution to ensure high-fidelity signal processing. The module features a compact, modular form factor that mounts directly on a DIN rail, with a dedicated terminal base (1794-TB or 1794-TBN) providing field wiring connections. It communicates over the FLEX I/O backplane, enabling real-time data exchange with controllers like ControlLogix, CompactLogix, and SLC 500 via remote I/O or DeviceNet adapters. The 1794-IE8 is engineered for harsh environments, with an operating temperature range of -20°C to +60°C and a storage range of -40°C to +85°C, along with 50g shock tolerance and 5g vibration resistance per IEC 60068-2-6. Each channel offers programmable input filtering, open-wire detection, and data scaling for flexible application in process control, manufacturing, and energy monitoring. The module supports hot-swapping without system disruption, and its low power consumption (typically 5V DC at 150 mA from the backplane) ensures minimal thermal load in dense panel configurations. For safety, it provides 1500V DC isolation between channels and backplane, meeting UL, CSA, and CE certifications.

Parameter	Specification
Product Type	FLEX I/O Analog Input Module
Model Number	1794-IE8
Number of Channels	8 (single-ended)
Input Signal Types	4-20 mA, 0-20 mA, 0-5V DC, 1-5V DC, 0-10V DC (software-configurable per channel)
Resolution	16 bits (including sign bit)
Input Impedance	Current: 250 ohms; Voltage: 1 M ohm (typical)
Accuracy at 25°C	±0.1% of full scale (typical) for voltage; ±0.15% for current
Update Rate (per channel)	10 ms (typical, with filter disabled)
Common Mode Rejection Ratio (CMRR)	60 dB at 50/60 Hz
Normal Mode Rejection Ratio (NMRR)	60 dB at 50/60 Hz (with filter enabled)
Input Filter	Programmable: 10 Hz, 25 Hz, 50 Hz, 100 Hz, or disabled
Open-Wire Detection	Yes, per channel (for current inputs)
Isolation	1500V DC (channel-to-backplane), 500V DC (channel-to-channel)
Power Supply (from backplane)	5V DC at 150 mA (typical)
Terminal Base Required	1794-TB, 1794-TBN, or 1794-TB3 (sold separately)
Operating Temperature	-20°C to +60°C (-4°F to +140°F)
Storage Temperature	-40°C to +85°C (-40°F to +185°F)
Relative Humidity	5% to 95% non-condensing (IEC 60068-2-30)
Vibration Resistance	5g at 10-500 Hz (IEC 60068-2-6)
Shock Resistance	50g (11 ms half-sine pulse, IEC 60068-2-27)
Dimensions (H x W x D)	94 mm x 48 mm x 75 mm (3.7 in x 1.89 in x 2.95 in)
Weight	Approximately 0.14 kg (0.31 lb)
Certifications	UL 508, CSA C22.2 No. 142, CE (EN 61326-1), ATEX (Zone 2, optional)
Compatible Backplane Protocols	FLEX I/O bus (DeviceNet, ControlNet, EtherNet/IP via adapters)
LED Indicators	Module Status (green/red), Channel Status (green for active, red for fault)
Wiring Type	Removable terminal block (screw-type, 14-22 AWG)
MTBF	1,200,000 hours (per MIL-HDBK-217F, ground benign)