NFPW444-10 S2 Yokogawa Power Module

Yokogawa NFPW444-10 S2 STARDOM FCN/FCJ DC Power Supply Module

Yokogawa NFPW444-10 S2 STARDOM FCN/FCJ DC Power Supply Module

Availability: 20 left in stock

Yokogawa NFPW444-10 S2 Power Supply Module The Yokogawa NFPW444-10 S2, also cataloged as the NFPW444-10 Power Supply Module, operates as...

SKU: NFPW444-10

Manufacturer: Yokogawa
Product No.: NFPW444-10
Product Type: Power Supply Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 600g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa NFPW444-10 S2 Power Supply Module

The Yokogawa NFPW444-10 S2, also cataloged as the NFPW444-10 Power Supply Module, operates as a dedicated hardware component for step-down DC voltage conversion and field circuit bus powering within Yokogawa STARDOM FCN/FCJ controller platforms. Inserting directly into the base module slot, the assembly regulates a 24 VDC input down to a +5.1 VDC bus logic rail at up to 7.8 A while delivering an auxiliary 24 VDC output for field loop transceivers.

Hardware Specifications

Parameter	Specification
Model	NFPW444-10 S2
Brand	Yokogawa
Origin	Japan
Weight	0.6 kg
Dimensions	22 x 124 x 126 mm
Operating Temp	0 deg C to +55 deg C
Storage Temp	-20 deg C to +70 deg C
Relative Humidity	10-90 % RH (non-condensing)
Power Consumption	40 W (60 W peak output power)
Input Voltage Range	21.6-31.2 VDC (24 VDC nominal)
Max Input Current	3.3 A
Logic Output Voltage	+5.1 VDC (0 to 7.8 A nominal, 11.8 A peak)
Auxiliary Output	24 VDC (up to 4 A for field circuits)
Isolation	500 VAC for 1 min, >=50 Mohm at 500 VDC
Compliance	CE, IEC 61000 EMC, TUV

4-20 mA HART Loop Protocol Integration and Power Isolation

The Yokogawa NFPW444-10 S2 includes built-in galvanic isolation rated at 500 VAC to insulate logic circuits from field-side voltage transients. By routing an auxiliary 24 VDC feed to the backplane, it supplies power to 4-20 mA HART loop protocol transmitters without degrading signal processing paths. The low-ripple DC design prevents high-frequency noise injection into sensitive analog input channels, maintaining digital HART frequency-shift keying (FSK) communications across field wiring.

Frequently Asked Questions

Q: Does the NFPW444-10 S2 support dual-redundant hot-swapping in active STARDOM subracks?

A: Yes. When configured in a dual-redundant power configuration on an FCN base module, you can extract a failed unit without interrupting the +5.1 VDC logic bus or field loop power. The healthy power module assumes the full current load instantly.

Q: What protection mechanisms trigger if an external field loop develops a short circuit?

A: The module executes overcurrent shutdown when the total load reaches or exceeds 105% of capacity. It automatically limits short-circuit current to prevent thermal damage to the internal board traces and resets output voltage once the external fault condition clears.

Q: What is the maximum allowable voltage drop duration before logic bus shutdown occurs?

A: The module tolerates a momentary power failure of up to 2 ms while maintaining at least 90% of rated output voltage. Input drops exceeding this threshold initiate a graceful system power-fail interrupt across the backplane bus.

Field Installation Guidelines

First, turn off all primary 24 VDC power sources leading to the target base unit before mounting non-redundant hardware. Connect an ESD grounding wrist strap to an unpainted chassis earth point prior to handling the module.

Next, line up the module edge connector with the designated power slot on the FCN/FCJ subrack rail. Push the module straight in until the backplane connectors seat completely, then tighten the top and bottom securing screws to 0.5 Nm to verify proper earthing contact.

Then, route incoming 24 VDC supply cables through grounded metal conduits separate from high-voltage AC lines. Strip the DC feed wires to 7 mm, insert them firmly into the terminal block, and verify correct terminal polarity to prevent reverse-voltage trip conditions.

Finally, measure the incoming DC supply voltage at the terminal connections to verify it remains within the 21.6 to 31.2 VDC operational limits. Apply primary power and confirm that the green PWR front panel LED illuminates continuously without error indication.

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