Description

Yokogawa NFDV161-P00 Digital Input Module

The Yokogawa NFDV161-P00 serves as the primary NFDV161-P00 Digital Input Module utilized to execute 24 VDC discrete signal acquisition across Yokogawa STARDOM FCN/FCJ platforms. Configured for high-speed ON/OFF state detection in distributed controller racks, the Yokogawa NFDV161-P00 converts field contact states into system-level digital logic signals via isolated input circuitry.

Suffix Breakdown & Model Matrix

• -P00: Hardware configuration variant with pushbutton edge-counting capability on channels 1 to 32
• P option: Enables pulse/edge detection function for mechanical switch inputs
• 0 (first position): Standard configuration, no intrinsic explosion protection
• 0 (second position): Base module configuration type

Hardware Specifications

Parameter	Specification
Model Brand	Yokogawa NFDV161-P00
Origin	Japan / Singapore
Weight	Approx. 0.3 kg
Dimensions	Not specified
OperatingTemp	-20 degC to 60 degC
PowerConsumption	550 mA at 5 VDC system power
Input Channels	64 channels (isolated)
Input Type	24 VDC dry contact / sensor input
Input Impedance	Approx. 10 kOhm
Response Time	<= 8 ms (status mode)
Isolation	Optocoupler, 2000 V AC system-to-input
Data Update Cycle	Approx. 10 ms

Channel-to-Channel Isolation Architecture (Yokogawa DCS Input Layer)

The module implements optically isolated input stages to suppress inter-channel electrical interaction under high-density wiring conditions. Each channel group is segmented with common return isolation boundaries, reducing propagation of surge transients across adjacent digital inputs. Within STARDOM FCN architecture, the input buffer layer ensures deterministic state sampling aligned with internal system bus scan cycles, maintaining consistent digital state mapping under electrically noisy field conditions.

Frequently Asked Questions

Q: Can the module operate while inserted in a live STARDOM rack system?
A: The module supports hot-swap replacement under system design constraints. Field replacement requires stable backplane power conditions and adherence to STARDOM rack insertion sequencing.

Q: What is the electrical limitation for input signal validation?
A: Input ON detection is validated within 20.0 to 26.4 VDC range, while OFF state is defined at <= 5.0 VDC. Exceeding 30 VDC instantaneous input may trigger protective behavior.

Q: How are channel groups electrically separated?
A: The input structure is segmented with group-based common terminals and optocoupler isolation, preventing cross-channel electrical coupling.

Field Installation Guidelines

• Maintain shield termination at cabinet single-point ground only
• Use twisted pair wiring for all 24 VDC discrete input lines
• Observe channel group common terminal separation (16-channel grouping)
• Avoid routing input cables parallel to high-voltage switching conductors
• Ensure connector seating torque and latch engagement is fully secured before energization

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems