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Description
Technical Specifications
| Parameter Name | Value |
|---|---|
| Product Model | 1738-IB8M8 |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Product Type | ArmorPoint Digital Input Module |
| Number of Inputs | 8 sinking DC inputs (single group) -2 |
| Connector Type | 8 x M8 (Pico) threaded connectors, 4-pin -11 |
| Nominal Input Voltage | 24V DC -2 |
| On‑State Voltage Range | 10V DC to 28.8V DC -2-4 |
| Off‑State Maximum Voltage | 5V DC -2-10 |
| Nominal On‑State Current | 4mA at 24V DC (typical) -2-5 |
| Off‑State Maximum Current | 1.5mA -2-4 |
| Input Filter Time | 0.5ms hardware + (0…65ms selectable) -4 |
| POINTbus Current Draw | 75mA at 5V DC -2-4 |
| Power Dissipation | 1.6W at 28.8V DC -4 |
| Isolation Voltage | 50V (continuous), Basic Insulation Type -2 |
| Enclosure Rating | IP67, NEMA 4X/6P (sealed for on‑machine use) -2-6 |
| Operating Temperature | -20°C to +60°C (-4°F to 140°F) -2 |
| Storage Temperature | -40°C to +85°C (-40°F to 185°F) -2 |
| Weight | 0.88 lbs (0.40 kg) -2 |
| Mounting | On‑machine direct mount (no DIN‑rail required) -2 |
Main Features and Advantages
Rugged On‑Machine Design: The 1738-IB8M8 features a fully encapsulated, IP67/IP69K‑rated housing that eliminates the need for a control cabinet in many applications -2-9. This rugged construction allows the 1738-IB8M8 to withstand high‑pressure washdowns, dust ingress, and temporary water immersion, making it suitable for food and beverage processing lines and other sanitary environments. The module’s vibration‑resistant design ensures signal integrity even on moving machinery -2.
Compact M8 Connectivity: The 1738-IB8M8 utilizes eight M8 (Pico) quick‑disconnect connectors, providing a highly compact footprint compared to standard M12 versions -9. Each connector serves a single input channel, with pin assignments standardized across the ArmorPoint family -11. This connectorized approach significantly reduces wiring errors and commissioning time compared to traditional terminal blocks -9. The 1738-IB8M8 supports plug‑and‑play installation, minimizing downtime during maintenance or reconfiguration.
High‑Speed Signal Processing: The 1738-IB8M8 delivers rapid input response with a hardware filter time of just 0.5ms, supplemented by user‑selectable software filtering up to 65ms -4. This makes the 1738-IB8M8 ideal for applications requiring fast reaction to proximity sensors, limit switches, and pushbuttons -9. Per‑channel green LED indicators provide immediate visual feedback on input status, simplifying troubleshooting -10-11.
Seamless System Integration: The 1738-IB8M8 integrates with Rockwell Automation’s Integrated Architecture™ via 1738 communication adapters supporting EtherNet/IP, DeviceNet, and ControlNet networks -6. Configuration is streamlined through Studio 5000 Logix Designer® environment with Add‑on Profiles (AOPs), allowing engineers to efficiently deploy the 1738-IB8M8 in distributed control architectures. The module supports point‑level diagnostics, enabling the PLC to monitor remote module health -12. The 1738-IB8M8 also supports hot‑swapping, allowing module replacement without system shutdown when used with compatible adapters -6.
Application Field
Food and Beverage Processing: The 1738-IB8M8 is ideally suited for food and beverage production lines that require frequent high‑pressure washdowns and chemical cleaning -2-9. Its IP69K sealing ensures reliable operation on conveyors, fillers, and packaging equipment where exposure to moisture and cleaning agents is constant. The 1738-IB8M8 interfaces directly with proximity sensors and photoelectric sensors used for product detection, counting, and position monitoring, all without the need for a protective enclosure -6.
Automotive Manufacturing: In automotive assembly plants, the 1738-IB8M8 supports welding cells, robotic stations, and conveyor systems -2. The module’s vibration‑resistant M8 connectors prevent accidental disconnection due to machine movement, ensuring high signal integrity for sensor arrays monitoring part presence and positioning. The 1738-IB8M8 can be mounted directly on robot arms or machine frames where space is limited, reducing cabling runs and improving system response times -9.
Material Handling and Logistics: The 1738-IB8M8 is widely deployed in automated storage and retrieval systems, sortation equipment, and conveyor networks -6. It provides high‑density sensing capability for packages, totes, and pallets, interfacing with inductive, capacitive, and optical sensors. The distributed nature of ArmorPoint systems allows the 1738-IB8M8 to be placed close to the sensors, minimizing cable runs and simplifying system architecture for large‑scale material handling facilities -12.
Machine Building and OEM Equipment: For original equipment manufacturers, the 1738-IB8M8 offers a space‑saving, rugged I/O solution for modular machine designs -9. Its on‑machine mounting capability eliminates the need for dedicated control cabinets on small machine skids, reducing overall equipment footprint -2. The standardized M8 connectors allow for quick assembly and disassembly, supporting efficient production and field service -9.
