Yokogawa NFAP135-S50 Pulse Input Module | STARDOM

Product Overview

The Yokogawa NFAP135-S50 functions as a high-performance pulse input interface for the STARDOM autonomous controller series. This module captures frequency-based signals from flow meters, tachometers, and encoders, converting high-speed pulses into precise digital data. We supply this unit as 100% Brand New and Original, providing a factory-certified solution for mission-critical data acquisition where signal timing and isolation remain paramount.

Part Number Breakdown

The NFAP135 series utilizes a modular suffix system to define its hardware generation and functional compatibility:

Technical Specifications

The NFAP135-S50 handles high-frequency inputs with superior electrical isolation:

• Input Channels: 8 isolated channels

• Input Frequency Range: 0 to 10 kHz

• Data Refresh Cycle: 2 ms

• Signal Types: Supports 2-wire (Contact ON/OFF, voltage/current pulse) and 3-wire (Voltage pulse)

• Pulse Width: Minimum detectable width of 40 μs

• Transmitter Power Supply: Selectable 12 V DC or 24 V DC output

• Withstanding Voltage: 500 V AC for 1 minute (Channel-to-channel and channel-to-system)

• Weight: 0.3 kg

• Connection Type: Pressure clamp terminal or MIL connector cable

Engineering Advantages

The NFAP135-S50 solves specific field integration challenges through robust electrical engineering:

• Comprehensive Signal Isolation: The module provides 500 V AC isolation between individual channels. This architecture prevents electrical noise or ground loops from affecting adjacent inputs, ensuring accurate frequency measurement even in environments with heavy motor interference.

• Integrated Transmitter Power: This unit eliminates the need for external power supplies for field sensors. By supplying selectable 12V or 24V DC directly to 2-wire or 3-wire transmitters, it simplifies cabinet wiring and reduces hardware costs.

• Anti-Chattering Filter Function: The software-selectable filter eliminates mechanical contact bounce (chattering). This ensures the controller counts only valid pulses, preventing false data readings in systems utilizing relay or transistor switch inputs.

• High-Speed Determinism: A rapid 2 ms data refresh cycle ensures the STARDOM controller tracks instantaneous changes in flow rates or rotational speeds. This minimizes control lag in high-speed PID loops.

• Flexible Termination Options: Engineers can choose between pressure clamp terminals for direct wiring or MIL connector cables for rapid, pre-fabricated system assembly.

FAQs

Q: Can the NFAP135-S50 supply power to a 4-20mA transmitter?

A: No. While this module provides 12/24V DC power, it specifically captures pulse and frequency signals. For 4-20mA analog signals, you must use an analog input module like the NFAI143.

Q: How does the module handle high-frequency current pulses?

A: The NFAP135-S50 internally converts current pulses into voltage signals. You can select the appropriate shunt resistance (OFF/200/500/1000 Ω) to match the impedance requirements of your field sensor.

Q: Does this module support hot-swapping?

A: The STARDOM FCN architecture supports hot-swapping of I/O modules; however, you must ensure the baseplate configuration and software settings allow for online replacement to avoid process interruption.

Q: Is this a 100% original Yokogawa part?

A: Yes. We guarantee every NFAP135-S50 is 100% Brand New and Original, shipped in the manufacturer’s factory-sealed packaging with full traceability.