AB 1794-IM8 | 220V AC Digital Input Module 8-Channel

Availability: 20 left in stock

Product Overview The Allen-Bradley 1794-IM8 serves as a high-density AC input solution for the FLEX I/O platform. It interfaces eight 220V to...

SKU: 1794-IM8

Manufacturer: Allen Bradley
Product No.: 1794-IM8
Product Type: Digital Input Modules
Product Origin: USA
Payment:T/T, Western Union
Weight: 140g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Product Overview

The Allen-Bradley 1794-IM8 serves as a high-density AC input solution for the FLEX I/O platform. It interfaces eight 220V to 240V AC field signals—such as those from motor starters, pumps, and lighting circuits—directly into your control architecture. Its modular design eliminates the need for interposing relays or voltage transformers, allowing the PLC to monitor high-voltage industrial equipment directly. We supply this unit as 100% Brand New and Original in factory packaging, ensuring full compatibility with Series A installations and standard 1794 terminal bases.

Technical Specifications

Specification	Technical Details
Number of Inputs	8 (Non-isolated)
Nominal Input Voltage	240V AC
On-State Voltage Range	79V to 265V AC (47–63 Hz)
Nominal Input Current	12 mA @ 240V AC
Maximum Off-State Voltage	40V AC
Maximum Off-State Current	2.6 mA
Input Impedance	22.3 kΩ (Nominal)
Flexbus Current	30 mA @ 5V DC
Power Consumption	5.5 Watts
Isolation Voltage	250V Continuous
Operating Temperature	0 to 55 °C (32 to 131 °F)
Product Net Weight	0.06 kg (0.13 lbs)
Shipping Weight	1.50 kg (Includes robust protective packaging)

Engineering Advantages

Direct High-Voltage Monitoring: The 1794-IM8 accepts signals up to 265V AC. This capability allows engineers to monitor the status of mains-powered motors and lighting systems without installing step-down transformers, significantly reducing cabinet complexity and material costs.
Reduced Panel Footprint: By integrating 8 high-voltage points into a compact 9.4cm x 9.4cm profile, this module optimizes rail space. The FLEX I/O architecture allows for distributed placement, moving the I/O closer to the field devices to shorten sensitive wiring runs.
Hot-Swappable Functionality: The module supports Removal and Insertion Under Power (RIUP). Maintenance teams can replace a faulty module without shutting down the entire 1794 system backplane, preventing costly unplanned production downtime.
Hazardous Location Approved: Certified for demanding environments (UL, CSA, CE), the 1794-IM8 operates reliably in sectors like oil and gas, chemical processing, and heavy manufacturing where electrical integrity is non-negotiable.

FAQs

Which terminal base units are compatible with the 1794-IM8?

For the 1794-IM8, we recommend using the 1794-TBN or 1794-TBNK (kote version for corrosion resistance) terminal base units. These bases provide the necessary terminal spacing and electrical ratings required for high-voltage AC wiring.

Does this module provide isolation between individual channels?

The 1794-IM8 provides isolation between the field-side AC inputs and the internal Flexbus system logic (up to 250V continuous). However, the eight input channels themselves are non-isolated from each other, meaning they share a common reference point on the terminal base.

What is the significance of the 8 yellow status indicators?

Each LED on the front panel corresponds to an input channel. A lit LED confirms that the module detects an "On-state" voltage (greater than 79V AC) at that specific terminal. This feature allows for rapid visual troubleshooting without requiring a laptop or multimeters.

Can I use the 1749-IM8 on a 110V AC system?

While the module technically switches "On" starting at 79V AC, it is optimized for 220V/240V AC nominal systems. For dedicated 110V/120V AC applications, we suggest using the 1794-IA8 or 1794-IA16 modules to ensure the input impedance and current thresholds match your source.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.