NFDV557-S00 S2 YOKOGAWA Digital Input Module

NFDV557-S00 S2 YOKOGAWA CENTUM VP Digital Input Module

NFDV557-S00 S2 YOKOGAWA CENTUM VP Digital Input Module

Availability: 10 left in stock

YOKOGAWA NFDV557-S00 S2 Digital Input Module Configured for discrete ON/OFF signal acquisition in Yokogawa CENTUM VP and CS 3000 DCS...

SKU: NFDV557-S00 S2

Manufacturer: Yokogawa
Product No.: NFDV557-S00 S2
Product Type: Digital Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 100g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

YOKOGAWA NFDV557-S00 S2 Digital Input Module

Configured for discrete ON/OFF signal acquisition in Yokogawa CENTUM VP and CS 3000 DCS systems, the YOKOGAWA NFDV557-S00 S2 (NFDV557 Digital Input Module) provides direct physical/electrical execution. It handles field contact states from switches, valves, and motor starters, routing isolated status data directly across the Enhanced Signal Bus (ESB) backplane.

Hardware Specifications

Parameter	Specification
Model	NFDV557-S00 S2
Brand	Yokogawa
Origin	USA
Weight	0.1 kg
Dimensions	2.2 cm x 12.4 cm x 12.6 cm
Operating Temp	0 to 55 deg C
Power Consumption	System backplane powered via Node Unit
Channel Count	32 channels
Input Voltage Range	24 VDC
Signal Type	Discrete ON/OFF, NAMUR-compatible
Isolation	Optical isolation between field side and system bus
Scan Rate	Synchronized with FCS control cycle
Mounting	Node Unit (NU) / I/O Unit rack-mount
Suffix Codes	-S00 (Standard configuration), S2 (Revision 2)

Process Control & DCS Signal Conditioning

The module utilizes optical channels to isolate high-voltage field transients from the system backplane, preventing EMI propagation into the Field Control Station (FCS). Channel-to-channel signal integrity maintains accurate status transmission across the 4-20 mA and discrete IO infrastructure. Internal logic processes both dry and wet contact conditions, ensuring deterministic cycle synchronization without backplane bus latency.

Frequently Asked Questions

Q: Does the module support hot-swapping during active DCS operation?

A: Yes, maintenance personnel can insert or remove the module from the Node Unit backplane while the Field Control Station remains online, provided standard ESD grounding precautions are followed.

Q: What cable connection interface does the input section support?

A: Field connection requires standard pressure clamp terminals designed for direct wire termination to the 32 input channels.

Q: How does the module indicate active channel logic states?

A: Front-panel LED indicators reflect individual channel actuation states directly from the field circuit side before optical isolation.

Field Installation Guidelines

Mount the module strictly within an energized or de-energized Yokogawa Node Unit rack slot by aligning the card edges with the guide rails. Push the unit firmly until the rear connector seats into the ESB backplane, then hand-tighten the top and bottom retaining screws to secure the physical ground path.

Ensure all field wiring uses shielded twisted-pair cables terminated at the pressure clamp block. Ground signal cable shields at a single point on the system side ground bar to prevent ground loops. Maintain a minimum bending radius of 50 mm on all incoming field wiring harnesses to prevent mechanical stress on terminal contact points. Keep signal lines segregated from high-voltage AC power conduits by at least 300 mm to suppress inductive interference.

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