Omron NX-OD4121 - 16-Point Digital Output Module for Industrial Automation Systems

Comprehensive Product Overview

The Omron NX-OD4121 represents a high-performance, industrial-grade 16-point digital output module specifically engineered for integration within the NX Series I/O system architecture. This precision-engineered module delivers reliable transistor-based sink output functionality, optimized for demanding industrial automation environments requiring consistent DC load control. With its compact 35mm width form factor, the NX-OD4121 provides exceptional space efficiency in control panel installations while maintaining robust performance characteristics.

Designed to meet rigorous industrial standards, this output module features 1,500VAC isolation between internal circuits and outputs, ensuring operational safety and system integrity. The NX-OD4121 is particularly suited for applications requiring precise switching control with its fast 1ms response time and stable performance across a 12-24VDC load voltage range. Backed by Omron's standard 1-year manufacturer warranty, this module delivers reliable operation in temperature ranges from 0°C to 55°C, making it ideal for diverse industrial environments.

Advanced Features and Operational Benefits

• High-Density Output Configuration: Sixteen independent digital outputs in a space-saving 35mm (W) × 90mm (H) × 65mm (D) housing, maximizing control cabinet space utilization while maintaining full functionality
• Precision Switching Performance: NPN transistor-based sink outputs with industry-leading 1ms maximum response time (both ON and OFF states) for accurate process timing synchronization
• Versatile Voltage Compatibility: Supports 12-24VDC load voltage (±10% tolerance) with 0.5A current capacity per point (8A total module maximum) for broad application compatibility
• Robust Industrial Construction: Engineered with 1,500VAC isolation between internal circuits and outputs, plus built-in surge protection for inductive load applications
• Energy Efficient Operation: Low power consumption design (1.5W typical at 24VDC) reduces overall system energy requirements and operational costs
• Enhanced Reliability: Screwless clamp terminal design accommodates 0.3 to 2.5mm² (AWG 22-14) wiring with vibration resistance up to 150Hz at 9.8m/s² acceleration
• Simplified Maintenance: LED indicators for each output channel provide immediate visual status monitoring during operation and troubleshooting

Industrial Automation Applications

• Factory Automation Systems: Precise control of solenoid valves, pneumatic actuators, small DC motors, and industrial relays in automated assembly and production lines
• Material Handling Equipment: Reliable switching control for conveyor systems, automated storage/retrieval systems, lift mechanisms, and AGV (Automated Guided Vehicle) navigation
• Packaging Machinery: Synchronized output control for filling machines, capping systems, labeling equipment, and wrapping/palletizing systems requiring precise timing
• Process Control Installations: Actuation of control elements in chemical processing, food production, pharmaceutical manufacturing, and water treatment facilities
• Industrial Lighting Control: Management of LED work area illumination, machine status indicators, and safety lighting systems in manufacturing environments
• Test and Measurement Equipment: Switching functions for automated test benches, quality control systems, and production line testing stations
• Building Automation: Integration with HVAC control systems, access control mechanisms, and facility monitoring equipment

Complete Technical Specifications

Category	Detailed Specifications
Product Identification	Omron NX-OD4121 (Genuine OEM Part Number)
Output Configuration	16-point independent digital outputs, NPN transistor sink type configuration
Electrical Characteristics	Rated Load Voltage: 12-24VDC (±10% tolerance range) Maximum Load Current: 0.5A per point (8A total module maximum) On-state Voltage Drop: ≤1.5V at 0.5A load current Leakage Current: ≤0.1mA in OFF state Surge Protection: Built-in protection for inductive load applications
Performance Parameters	Switching Response Time: ≤1ms (both ON and OFF transitions) Output Refresh Cycle: Synchronized with NX bus communication cycle Isolation Voltage: 1,500VAC for 1 minute (internal circuit to outputs)
Physical Specifications	Dimensions: 35mm (W) × 90mm (H) × 65mm (D) Weight: 150g (0.33 lbs) Terminal Type: Screwless clamp (spring terminal) design Wire Compatibility: 0.3 to 2.5mm² (AWG 22-14) solid or stranded
Environmental Ratings	Operating Temperature: 0°C to 55°C (32°F to 131°F) Storage Temperature: -25°C to 65°C (-13°F to 149°F) Humidity Range: 10% to 90% RH (non-condensing) Vibration Resistance: 10-57Hz at 0.075mm amplitude, 57-150Hz at 9.8m/s² Shock Resistance: 147m/s², 3 shocks each in X, Y, Z directions Protection Class: IP20 per IEC standard
Power Requirements	Power Consumption: 1.5W typical at 24VDC operation Bus Power: Supplied through NX-series backplane connection
Compliance & Warranty	Manufacturer Warranty: 1 year from date of purchase Safety Standards: Complies with relevant IEC and UL standards EMC Performance: Meets industrial electromagnetic compatibility requirements

System Integration and Compatibility

The NX-OD4121 digital output module is specifically designed for seamless integration within Omron's NX-series I/O system architecture. This module connects directly to NX-series power supply units and communicates via the high-speed NX bus, ensuring synchronized operation with other system components. The compact design enables high-density installations when combined with other NX-series I/O modules, allowing for flexible system expansion to accommodate evolving automation requirements.

For optimal performance, the NX-OD4121 should be installed in accordance with Omron's NX-series installation guidelines, maintaining proper clearance for heat dissipation and accessibility. The module's screwless clamp terminal design facilitates quick and secure wiring connections while minimizing installation time. When planning system layouts, consider the module's 35mm width to maximize control panel space utilization while maintaining proper ventilation and service access.