Allen-Bradley 1738-IB8M8 ArmorPoint Digital Input Module

Product Overview

The Allen-Bradley 1738-IB8M8 is a high-density digital input module belonging to the Rockwell Automation ArmorPoint I/O family. Engineered specifically for on-machine installation without the need for a secondary protective enclosure, this module provides eight sinking (NPN) input channels within a compact, IP67/IP69K-rated housing. The Allen-Bradley 1738-IB8M8 leverages M8 (Pico) style threaded connectors, which are significantly smaller than standard M12 interfaces, making it an ideal solution for space-constrained applications where traditional control cabinets cannot be accommodated.

As a core component of the ArmorPoint distributed I/O system, the Allen-Bradley 1738-IB8M8 operates as a slave module that requires a compatible communication adapter base, such as the 1738-AENTR for EtherNet/IP networks. This architectural design allows engineers to place I/O points closer to the actual sensors, thereby reducing wiring complexity, minimizing signal interference, and lowering overall installation costs. The module is purpose-built for harsh industrial environments, offering robust performance in washdown zones, high-moisture areas, and applications subject to vibration and temperature fluctuations.

Category: FUJI

Contact Us WhatsApp / Wechat：+8618150087953
Phone：+86 18150087953
Email：sales@cxplcmro.com

Description

Technical Specifications

Parameter Name	Parameter Value
Product Model	Allen-Bradley 1738-IB8M8
Manufacturer	Allen-Bradley (Rockwell Automation)
Product Type	Digital Input Module (ArmorPoint)
Input Channels	8 (Sinking / NPN)
Operating Voltage	24V DC Nominal
On-State Voltage Range	10V DC to 28.8V DC
Off-State Voltage Maximum	5V DC
Input Current	4 mA per channel at 24V DC
Connector Type	M8 (Pico) Threaded Connectors
Enclosure Rating	IP67, NEMA 4X/6P (IP69K available)
Operating Temperature	-20°C to +60°C
Storage Temperature	-40°C to +85°C
Communication Interface	Via 1738 communication adapter (EtherNet/IP, DeviceNet)
Mounting	On-machine, direct mounting to adapter base
Dimensions	Approximately 112mm × 103mm × 101mm

Main Features and Advantages

Compact M8 Connector Design: The Allen-Bradley 1738-IB8M8 utilizes M8 (Pico) threaded connectors, which are substantially smaller than the M12 connectors found on other ArmorPoint modules. This design enables a higher density of input points within a reduced footprint, making the Allen-Bradley 1738-IB8M8 particularly suitable for robotic tooling and small machine skids where mounting space is at a premium.

Rugged On-Machine Durability: With an IP67/IP69K enclosure rating, the Allen-Bradley 1738-IB8M8 eliminates the need for protective cabinets. The module is fully encapsulated to withstand dust, high-pressure water jets, and steam cleaning, ensuring reliable operation in food and beverage processing, pharmaceutical cleanrooms, and automotive assembly environments. Its wide operating temperature range of -20°C to +60°C further extends its applicability across diverse industrial settings.

Vibration-Resistant Quick Disconnects: The M8 threaded connectors provide a secure, screw-on interface that prevents accidental disconnection due to machine vibration. This feature significantly enhances signal integrity compared to standard terminal blocks and reduces maintenance downtime through quick sensor replacement.

Seamless Integration with ArmorPoint System: As a member of the ArmorPoint family, the Allen-Bradley 1738-IB8M8 integrates seamlessly with existing distributed I/O architectures. The module supports Removal and Insertion Under Power (RIUP) and Auto Device Replacement (ADR), allowing for hot-swapping and automatic configuration recovery without manual intervention.