E3X-NH21 | Omron Fiber-Optic Sensor Amplifier with Timer, NPN, 12–24VDC

Omron · Sensors & Instrumentation

Description  The Omron E3X-NH21 is a fiber-optic photoelectric sensor amplifier designed for high-precision detection in industrial automation systems. Operating on 12–24 VDC, it features an NPN open-collector output with selectable Light-ON/Dark-ON modes and an integrated timer function. This unit is engineered for stable sensing performance in applications requiring fine sensitivity adjustment and reliable signal control.     Technical Specifications  Condition New/Never Used Surplus Brand Omron Category Sensors & Switches Part Number E3X-NH21 Subcategory Photoelectric Series E3X-NH Amplifier Type Timer Function Sensor Type Fiber-Optic Amplifier Light Source Red LED (680 nm) Supply Voltage 12 to 24 VDC ±10% (Ripple 10% max.) Current Consumption 75 mA max. Output Type NPN Open Collector Max Load Current 50 mA Operation Mode Light-ON / Dark-ON selectable Response Time 1 ms max. Mounting Type DIN Rail Operating Temperature -25°C to +55°C Protection Output short-circuit and reverse polarity protection Weight 0.01 lbs   Information About E3X-NH21 The E3X-NH21 is a timer-function amplifier from Omron’s E3X-NH fiber-optic sensor series, developed for use with E32 fiber units in demanding detection environments. It incorporates a red LED light source (680 nm) and supports automatic or manual fine threshold adjustment for accurate detection of small or low-contrast objects. Designed for DIN rail mounting, the unit integrates output short-circuit protection and reverse polarity protection for enhanced operational reliability. Its compact housing and selectable operation modes make it suitable for tightly spaced control panels and multi-sensor installations. Key Features: Fiber-Optic Amplifier Design: Compatible with E32 series fiber heads for flexible sensing configurations. NPN Open-Collector Output: 50 mA max load current for direct PLC interfacing. Timer Function Built-In: Integrated timing control for delayed output operation. Selectable Light-ON/Dark-ON Mode: Configurable output logic for application flexibility. Fine Sensitivity Adjustment: 13-level manual threshold adjustment for precise detection tuning. Red LED Light Source (680 nm): Stable and consistent optical emission for reliable sensing. Protection Circuits: Includes output short-circuit and reverse polarity protection. DIN Rail Mounting: Compact housing suitable for standard control panel installation. The E3X-NH21 delivers the reliability and precision required for high-accuracy fiber-optic sensing applications in industrial automation systems.

Brand: Omron · Category: Sensors & Instrumentation

Key features

• Fiber-Optic Amplifier Design: Compatible with E32 series fiber heads for flexible sensing configurations.
• NPN Open-Collector Output: 50 mA max load current for direct PLC interfacing.
• Timer Function Built-In: Integrated timing control for delayed output operation.
• Selectable Light-ON/Dark-ON Mode: Configurable output logic for application flexibility.
• Fine Sensitivity Adjustment: 13-level manual threshold adjustment for precise detection tuning.
• Red LED Light Source (680 nm): Stable and consistent optical emission for reliable sensing.
• Protection Circuits: Includes output short-circuit and reverse polarity protection.
• DIN Rail Mounting: Compact housing suitable for standard control panel installation.

Specifications

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