Allen-Bradley 1738-IB8M8 ArmorPoint Input Module

Allen-Bradley 1738-IB8M8 ArmorPoint Input Module The Allen-Bradley 1738-IB8M8, also cataloged as the 1738-IB8M8 Input Module, operates as a dedicated hardware component for 24 VDC signal acquisition within ArmorPoint I/O systems. It provides non-isolated sinking input channels through M8 connectors in a sealed IP67 enclosure. Hardware Specifications Parameter Specification Model 1738-IB8M8 Brand Allen-Bradley Product Type Input Module Product Family ArmorPoint I/O Weight 0.88 lb Operating Temp -20 to 60 deg C Storage Temp -40 to 85 deg C Power Consumption 1.6 W Connector Type M8 (Pico) Inputs per Module 8 Non-Isolated Sinking Inputs Nominal Input Voltage 24 VDC Maximum Off-State Voltage 5 VDC Input Current Nominal 4 mA @ 24 VDC Input Current Maximum 1.5 mA Housing IP67 sealed (IP69K-rated) Certification c-UL-us, CE, C-Tick Profinet / EtherNet/IP Deterministic Networks The 1738-IB8M8 integrates into distributed ArmorPoint I/O networks while maintaining deterministic signal delivery over EtherNet/IP. It ensures I/O density scaling without impacting backplane communication timing. Module firmware is compatible with standard Rockwell Automation controller updates, supporting hot-swap insertion with minimal network disturbance. Frequently Asked Questions Q: Can the 1738-IB8M8 module be hot-swapped? A: Yes, it supports field replacement while powered, provided downstream wiring is properly isolated and adherence to ArmorPoint insertion sequence is maintained. Q: Are the input channels electrically isolated? A: No, the 8 sinking inputs are non-isolated. Care should be taken to avoid ground loops. Q: What connector type is used for field wiring? A: The module uses M8 (Pico) connectors, suitable for shielded industrial cabling. Field Installation Guidelines Install the module in the designated ArmorPoint rack or expansion assembly following mechanical latching sequence. Ensure all M8 connectors are fully seated and sealed to maintain IP67/IP69K protection. Route field wiring separately from high-energy AC or switching circuits to minimize electrical noise. Connect shields according to local grounding practices; single-point grounding is recommended. Inspect connectors and cable seals periodically for damage, moisture ingress, or loose terminations. De-energize power when modifying module placement or field connections.