NFAP135-S00 Yokogawa STARDOM Datasheet & Technical Manual

Pulse Input Module | Yokogawa NFAP135-S00 STARDOM

Pulse Input Module | Yokogawa NFAP135-S00 STARDOM

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Yokogawa NFAP135-S00 STARDOM Pulse Input Module Configured for high-speed pulse acquisition in Yokogawa STARDOM platforms, the Yokogawa NFAP135-S00 (NFAP135 Pulse...

SKU: NFAP135-S00

Manufacturer: Yokogawa
Product No.: NFAP135-S00
Product Type: Pulse Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 200g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa NFAP135-S00 STARDOM Pulse Input Module

Configured for high-speed pulse acquisition in Yokogawa STARDOM platforms, the Yokogawa NFAP135-S00 (NFAP135 Pulse Input Module) provides direct physical/electrical execution. It operates within the Field I/O (FIO) subsystem to acquire pulse count signals from 2-wire and 3-wire field transmitters, contact closures, and voltage pulses across 8 isolated channels.

Suffix Breakdown & Model Matrix

Option Code	Description	Technical Details
NFAP135	Base Model Code	Pulse Input Module (8-channel, isolated, 0 to 10 kHz)
-S	Type	Standard type
0	Option	Basic type
0	Always 0	Basic specification

Hardware Specifications

Parameter	Specification
Model	NFAP135-S00
Brand	Yokogawa
Origin	Japan
Weight	0.2 kg (0.44 lbs)
Dimensions	130 x 107.5 x 32.8 mm
Operating Temp	0 to 55 deg C
Power Consumption	300 mA at 5 VDC; 400 mA at 24 VDC
Number of Channels	8 isolated channels
Input Signal Types	2-wire (contact ON/OFF, voltage pulse, current pulse); 3-wire (voltage pulse)
Input Frequency Range	0 to 10 kHz
Minimum Pulse Width	40 us
Data Refresh Cycle	2 ms
Isolation Voltage	500 VAC for 1 min (input to system / channel to channel)
Shunt Resistance	Selectable OFF / 200 / 500 / 1000 ohm (open when power is OFF)
Pull-up Resistance	68 k ohm (12 VDC or 24 VDC)
Transmitter Power Supply	Selectable 12 VDC (40 mA limit) / 24 VDC (30 mA limit)
Terminal Connection	Pressure clamp terminal connection

Process Control Loop Integration Features

The module provides full integration with 4-20 mA HART loop protocol environments and digital field transmitters via configurable pulse sensing channels. Channel-to-system and channel-to-channel galvanic isolation rated for 500 VAC prevents ground loops and suppresses high-voltage common-mode transients. Integrated hardware filtering eliminates contact chattering, while selectable onboard shunt resistors enable direct current-to-voltage pulse conversion without external signal conditioning modules.

Frequently Asked Questions

Q: How does the module handle contact chattering on mechanical switch inputs?

A: The module includes a software-selectable hardware filter function designed to suppress mechanical contact chattering and eliminate false pulse counts on slow-moving inputs.

Q: What are the current limiting thresholds for the built-in transmitter power supply?

A: When configured for 12 VDC field power, the internal limiter caps output current at 40 mA (+/-10%). When set to 24 VDC, output current is limited to 30 mA (+/-10%).

Q: What happens to the internal shunt resistors when field power is interrupted?

A: The onboard selectable shunt resistor networks revert to an open state whenever module power is lost, preventing unexpected circuit loads on connected field loops.

Field Installation Guidelines

Mount the NFAP135-S00 securely into the designated slot of the FIO rack chassis prior to applying power. Route field wiring directly to the pressure clamp terminals, verifying that conductor insulation is stripped back cleanly to ensure gas-tight contact. Maintain clear separation between high-voltage power leads and low-level pulse signal lines within cabinet wireways. Connect all signal shielding to the designated cabinet earth ground at a single termination point to prevent noise coupling into high-frequency input channels.

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