Description

Yokogawa NFDV161-P50 Digital Input Module

The Yokogawa NFDV161-P50, also cataloged as the NFDV161 Digital Input Module, operates as a dedicated hardware component for 24 VDC discrete signal acquisition within STARDOM FCN and FCJ controller platforms. It provides 64 fully isolated channels capable of handling pushbutton and general status inputs for industrial automation networks.

Hardware Specifications

Parameter	Specification
Model Brand	Yokogawa NFDV161-P50
Origin	Japan
Weight	0.3 kg
Dimensions	Standard single-slot STARDOM module form factor
Operating Temp	-20 degC to +60 degC
Storage Temp	-40 degC to +85 degC
Humidity Range	5% to 95% RH (non-condensing)
Number of Input Channels	64 (fully isolated)
Rated Input Voltage	24 VDC
Input Voltage Range (ON)	20 to 26.4 VDC
Input OFF Voltage	5.0 VDC max
Input Current	2.5 mA ±20% per channel
Instantaneous Max Input Voltage	30 VDC
Input Impedance	10 kΩ
Input Response Time	8 ms (status input)
Minimum ON Detection Time	20 ms (pushbutton input)
Max ON/OFF Cycle	25 Hz (pushbutton input)
Isolation Voltage	2 kV AC between input and system, 500 V AC between commons (every 16 channels)
Max Current Consumption	550 mA @ 5 VDC
External Connection	MIL connector cable or pressure clamp terminal, 0.5-2 mm² (AWG 20-14), peel length 11 mm

Process Control Features

The module supports channel-to-channel isolation for high-noise industrial environments, enabling accurate digital signal acquisition across the 64-channel array. It integrates with 4-20 mA HART loop protocols where upstream modules require discrete input translation. Cold junction compensation is applied to stabilize signal detection from devices subjected to ambient temperature drift. FOUNDATION Fieldbus and Profibus PA connectivity options are supported when integrated with hybrid I/O configurations.

Frequently Asked Questions

Q: What is the maximum input frequency for pushbutton detection?
A: The module supports up to 25 Hz maximum ON/OFF cycle for pushbutton inputs.

Q: Can the module be hot-swapped while the system is powered?
A: Yes, the NFDV161-P50 supports removal and insertion without shutting down the STARDOM controller, provided wiring integrity is maintained.

Q: How is galvanic isolation managed between channels?
A: Each channel is fully isolated, with 2 kV AC isolation to the system and 500 V AC between commons for every 16-channel group.

Field Installation Guidelines

1. Mount the module in the designated STARDOM rack slot and secure mechanical fasteners before energizing.
2. Use shielded twisted-pair cabling for field inputs to minimize cross-talk.
3. Connect MIL or clamp terminals per pinout diagram, verifying peel length and wire gauge.
4. Ground the module shield to the system common to reduce transient noise injection.
5. Avoid routing high-current power cables adjacent to input signal wiring to maintain isolation integrity.
6. Verify all input channels are within 20–26.4 VDC ON range before commissioning.

Specifications

• Brand: Yokogawa

Advantages

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