Omron K3HB-RNB-C2 K3HB Series Digital Rotary Pulse Indicator

Description

Engineered for high-speed rotational measurement, the Omron K3HB-RNB-C2 serves as a highly precise digital rotary pulse indicator within demanding industrial automation frameworks. Designed to support rotary pulse inputs up to 50 kHz, this device provides instantaneous, high-resolution velocity and rotation metrics. The unit integrates an NPN/voltage pulse sensor input configuration and utilizes four independent SPST-NO relay outputs for critical limit monitoring (HH, H, L, LL). Its multi-color display dynamically changes color based on alarm status, providing field operators with immediate visual confirmation of system performance.

Features

• High-Speed Pulse Processing: Capable of accurate signal evaluation up to 50 kHz for rapid shaft rotation and line speed monitoring.
• Versatile Sensor Input: Designed to interface natively with NPN open-collector or voltage pulse sensors.
• Quad Limit Relay Outputs: Provides dedicated SPST-NO contacts for High-High (HH), High (H), Low (L), and Low-Low (LL) limit controls.
• Dynamic Visual Feedback: Visual alert status communicated through a dual-color process value display.
• Robust Environment Adaptation: Engineered to maintain operations in ambient temperatures ranging from -10 to 55 degC.

Applications

• Rotational speed (RPM) monitoring of industrial electric motors and turbines.
• Conveyor line velocity tracking and throughput measurement in packaging systems.
• Flow meter pulse integration for volumetric rate monitoring.
• Operational safety interlock systems requiring overspeed or underspeed trip detection.

Technical Specifications Table

Empirical Engineering Insights

Alternative Models & Compatibility

The K3HB series serves as the modern standard update to legacy Omron K3N indicators. While functional similarities exist, please note that wiring structures and rear terminal blocks differ significantly. Panel cutouts are standardized, but back-of-panel depth clearances must be verified during system retrofits to accommodate the output terminal configuration on the K3HB-RNB-C2.

Application Pitfalls & Engineering Notes

When utilizing the maximum 50 kHz measurement range, standard sensor wiring is highly susceptible to electromagnetic interference (EMI). Run signal lines in independent, grounded steel conduits separate from high-current motor leads or Variable Frequency Drive (VFD) output cables to prevent false triggering. Keep the cable length to the sensor as short as possible to prevent signal attenuation.

Commissioning & Wiring Tips

Ensure that the internal parameter settings match the connected sensor type (NPN open-collector versus voltage pulse). Failing to configure this software parameter correctly may result in zero pulse registration or risk overloading the internal signal pull-up circuit. Always apply shielded twisted-pair (STP) cabling for the input connections.

Installation Guidelines