The Omron NX-OD3121 Machine Automation Controller Digital Output Unit provides 4 NPN outputs for industrial machine-control applications using 12 to 24 VDC output devices. It supports Synchronous and Free-Run refreshing, allowing output processing to operate with different machine-control requirements. The module provides a response time of 0.1 ms ON and 0.8 ms OFF for fast switching of connected devices. It operates from a 24 VDC power supply with power consumption of 5.80 W, supporting stable integration into NX-based automation systems. The NX-OD3121 combines NPN transistor switching with modular NX architecture and forms part of the transistor output PLC range used within Omron machine automation.
Switching Synchronous I/O refreshing and Free- Run refreshing
ON/OFF response time
0.1 ms max./ 0.8 ms max.
Dimensions (mm)
72 × 100 × 90 mm (W×H×D)
Power supply voltage
24 VDC (20.4 to 28.8 VDC)
Unit power consumption
5.80 W max.
Shock resistance
Conforms to IEC 60068-2-27. 147 m/s2, 3 times in X, Y, and Z directions
Vibration resistance
Conforms to IEC 60068-2-6. 5 to 8.4 Hz with 3.5-mm amplitude, 8.4 to 150 Hz, acceleration of 9.8 m/s2, 100 min each in X, Y, and Z directions (10 sweeps of 10 min each = 100 min total).
Noise immunity
2 kV on power supply line (Conforms to IEC 61000-4-4.)
