Allen-Bradley 1794-IE8/B FLEX I/O Analog Input Module
$123.00
$320.00
Description
Allen-Bradley 1794-IE8/B FLEX I/O Analog Input Module
Configured for isolated analog signal acquisition in the FLEX I/O System network, the Allen-Bradley 1794-IE8/B (1794-IE8 Analog Input Module) provides direct physical/electrical execution for converting field voltage and current inputs into PLC-accessible digital data values.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1794-IE8/B |
| Brand | Allen-Bradley / Rockwell Automation |
| Origin | United States |
| Power Consumption | 3.0 W maximum @ 31.2 V DC |
| Product Series | FLEX I/O System |
| Module Type | Analog Input Module |
| Number of Inputs | 8 single-ended isolated analog inputs |
| Input Signal Range | 0 to 10 V DC, +/-10 V DC, 0 to 5 V DC, +/-5 V DC, 0 to 20 mA DC, 4 to 20 mA DC |
| Resolution | 12-bit plus sign, 16-bit effective format |
| Data Format | 16-bit 2's complement integer |
| Conversion Type | Successive Approximation Register (SAR) |
| Conversion Rate | 256 us for all channels |
| Input Impedance | Voltage input: > 10 Mohm; Current input: 250 ohm nominal |
| External DC Power | 24 V DC nominal, 10.5 to 31.2 V DC range including 5% AC ripple |
| External DC Current | 60 mA @ 24 V DC |
| Absolute Accuracy | 0.20% of full scale @ 25 deg C for voltage and current inputs |
| Isolation Voltage | 50 V continuous, tested at 850 V DC for 1 s between user wiring and system logic |
EtherNet/IP and FLEX I/O Data Handling
The 1794-IE8/B operates as an analog acquisition node within the FLEX I/O architecture. The module receives voltage or current signals from field devices and transfers converted digital values through a FLEX I/O communication adapter connected to PLC/PAC control systems. The module supports deterministic I/O data exchange through compatible adapters including EtherNet/IP, ControlNet, and PROFIBUS DP interfaces.
The Series B hardware revision defines a specific module generation with corresponding firmware compatibility requirements. System configuration should verify adapter communication parameters and controller I/O profile compatibility before installation.
Frequently Asked Questions
Q: What type of field signals can the 1794-IE8/B process?
A: The module accepts single-ended analog voltage and current inputs including 0 to 10 V DC, +/-10 V DC, 0 to 5 V DC, +/-5 V DC, 0 to 20 mA DC, and 4 to 20 mA DC signals.
Q: Does the 1794-IE8/B provide channel isolation between analog inputs?
A: The module provides isolation between user wiring and system logic. Channel-to-channel isolation specifications are not provided in the supplied technical data.
Q: What are the power requirements of the module?
A: The module requires external 24 V DC nominal power and draws 60 mA at 24 V DC. Maximum power dissipation is specified as 3.0 W at 31.2 V DC.
Field Installation Guidelines
Install the 1794-IE8/B on a compatible FLEX I/O terminal base and verify mechanical engagement before applying field wiring. Use shielded instrumentation cable for analog signal connections where required by the installation environment. Connect cable shields according to the plant grounding standard to reduce electrical noise coupling.
Separate analog input wiring from high-current power conductors, motor cables, and switching outputs to minimize induced interference. Confirm that field transmitters and sensors share compatible signal reference points with the module input circuitry before commissioning.
Verify the external 24 V DC supply polarity, voltage range, and current capacity before energizing the module. Confirm controller configuration, adapter communication settings, and I/O mapping before placing the channel values into process control operation.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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