NFDV151-P60/B5S00

The Yokogawa NFDV151-P60/B5S00 is a 32-channel digital input module designed to receive 24 V DC signals from external field devices. It supports both status monitoring and push-button input, with a dedicated function for counting push-button signal edges. The module provides input-to-system isolation, status indication, and a pressure clamp terminal block for field wiring.

Input Functions and Signal Processing

The NFDV151 supports two input functions: status input and push-button input. Status input detects the ON/OFF state of connected devices, while push-button input detects and counts signal edges. This allows the module to handle both continuous equipment status monitoring and discrete operator push-button signals.

The input response time is 8 ms or less for status input. For push-button input, the minimum ON detection time is 20 ms, with a maximum ON/OFF cycle frequency of 25 Hz. These timing characteristics should be considered when selecting the module for applications involving short-duration signals or repeated button operations.

Electrical Characteristics and Isolation

Each of the 32 input channels operates at a rated voltage of 24 V DC, with an input ON voltage range of 18 to 26.4 V DC. An input voltage of 5.0 V DC or less is recognized as OFF. At the rated input voltage, the input current is 4.1 mA +/- 20% per channel.

The instantaneous allowable maximum input voltage is 30.0 V DC. The module withstands 2000 V AC for 1 minute between the input signal and system, and 500 V AC for 1 minute between commons. The commons are arranged in groups of 16 channels, with the common minus (-) side used for each group.

Terminal Connection and Configuration

The NFDV151-P60/B5S00 is supplied with a pressure clamp terminal block for digital inputs, identified as NFTB5S-00. The specified external connection options also include a MIL connector cable.

Its suffix configuration identifies the push-button edge-counting function, status display, and basic non-explosion-protection type. These details are relevant when checking the module against the existing field wiring and installation requirements.

Technical Specifications

Parameter	Specification
Model	NFDV151-P60/B5S00
Base Model	NFDV151
Brand	Yokogawa
Product Type	Digital Input Module
Number of Input Channels	32
Rated Input Voltage	24 V DC
Input ON Voltage	18 to 26.4 V DC
Input OFF Voltage	5.0 V DC or less
Input Current	4.1 mA +/- 20% per channel at rated input voltage
Instantaneous Allowable Maximum Input Voltage	30.0 V DC
Input-to-System Withstanding Voltage	2000 V AC for 1 minute
Between-Commons Withstanding Voltage	500 V AC for 1 minute
Common Arrangement	Common minus (-) side every 16 channels
Input Functions	Status input and push-button input
Status Detection	ON/OFF status detection
Push-Button Function	Edge counting
Input Response Time	8 ms or less for status input
Minimum ON Detection Time	20 ms for push-button input
Maximum ON/OFF Cycle	25 Hz for push-button input
Maximum Current Consumption	500 mA at 5 V DC
Status Display	Yes
Explosion Protection	No
External Connection	Pressure clamp terminal, MIL connector cable
Terminal Block Model	NFTB5S-00
Weight	0.3 kg

Suffix Configuration

The ordering code NFDV151-P60/B5S00 identifies the following configuration:

Code	Description
NFDV151	32-channel, 24 V DC isolated digital input module
-P	Push-button edge-counting function
6	With status display and without explosion protection
0	Basic type
/B5S00	Pressure clamp terminal block for digital input, model NFTB5S-00

Frequently Asked Questions

Q: What is the difference between status input and push-button input on the NFDV151?

A: Status input detects the ON/OFF condition of external devices, with an input response time of 8 ms or less. Push-button input detects and counts signal edges, with a minimum ON detection time of 20 ms and a maximum ON/OFF cycle of 25 Hz.

Q: Does the NFDV151-P60/B5S00 include a terminal block?

A: Yes. The /B5S00 configuration specifies a pressure clamp terminal block for digital input, identified as NFTB5S-00.

Q: Is the NFDV151-P60/B5S00 suitable for explosion-protected installations?

A: No. The suffix 6 specifies a version with status display and no explosion protection. An explosion-protection requirement must therefore be checked against the actual installation specifications before selecting this module.

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