1738-OB8EM8 | Allen-Bradley ArmorPoint 8-Point 24V DC Sourcing Output Module

Product Description

The 1738-OB8EM8 is a high-durability distributed I/O module from the Allen-Bradley ArmorPoint family, specifically engineered for "on-machine" applications. This module facilitates decentralized control by allowing the mounting of I/O points directly on machinery, significantly reducing cabinet space requirements and complex wiring runs. It features eight non-isolated sourcing DC outputs, making it ideal for driving actuators, solenoids, and indicators in a 24V DC architecture.

Built to withstand rigorous industrial conditions, the 1738-OB8EM8 (Part Number: 1738-OB8EM8) is housed in a robust, IP67-rated sealed enclosure that provides superior protection against dust, water jets, and coolant immersion. Connection is achieved via industry-standard M8 (Pico) connectors, ensuring a secure, vibration-resistant interface that is critical for automotive, material handling, and food and beverage processing lines.

Technical Specifications

• Brand: Allen-Bradley (Rockwell Automation)

• Model Number: 1738-OB8EM8

• Output Configuration: 8 Sourcing (PNP) Outputs, 1 Group of 8

• Connection Type: M8 (Pico) circular connectors

• Nominal Operational Voltage: 24V DC

• Operational Voltage Range: 10V DC to 28.8V DC

• Isolation Protection: 50V (Continuous) Basic Insulation Type

• Enclosure Environmental Rating: IP67 / NEMA 4X & 6P (Sealed)

• 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)

• Vibration Resistance: 5 g @ 10 to 500 Hz

• Physical Weight: 0.23 kg (0.50 lbs)

Operational Scenarios

The ArmorPoint 1738-OB8EM8 is the preferred choice for industrial environments where a traditional control cabinet is too far from the field devices or where the machine environment is too wet for standard IP20 modules. Its compact M8 footprint allows for high-density output clusters on robotic arms or modular conveyor segments.

Technical FAQ

What is the significance of the "EM8" suffix in this ArmorPoint module?The "E" denotes electronic fusing or enhanced diagnostics capabilities common in the ArmorPoint line, while "M8" specifies the physical connector standard. This allows for rapid replacement of cables without the risk of wire transposition.

Does this module require a separate mounting base?ArmorPoint modules like the 1738-OB8EM8 are designed to be part of a larger assembly. While they are "on-machine" rated, they must be correctly integrated into the ArmorPoint backplane structure and power bus to function within the network (such as EtherNet/IP or DeviceNet).