Overview

The Honeywell 900K01-0201 is a 4 channel pulse/frequency/quadrature module. This unit belongs to the Honeywell ControlEdge series. It provides three different functionalities for industrial counting and measurement. The 900K01-0201 supports pulse input, frequency measurement, and pulse output. Industrial users trust this module for high-speed digital signal processing.

Each channel can be configured for any one of these three functions. The module accepts DC voltage input from 0 to 24 VDC. A green blinking status LED indicates normal scanning operation. A red status LED alerts when module or channel diagnostics exist.

Technical Specifications

The 900K01-0201 module features 4 independent channels. The input voltage range is 0 VDC to 24 VDC. The digital output type is open collector (5 to 24V, 30mA max). This output is used for fast signaling applications.

General Specifications

• Input per Module: 4 channels

• Input Voltage Range: 0 VDC to 24 VDC

• Digital Output Type: Open collector, 5 to 24V, 30mA max

• ON Voltage Level: 3.0 VDC minimum

• OFF Voltage Level: 1.0 VDC maximum

• Input Impedance: 25K ohm

Pulse Input Specifications

The 900K01-0201 provides high-performance pulse counting capabilities.

Pulse Input Parameters

• Frequency: 10 KHz maximum

• Minimum Pulse Width: 3 μsec

• Pulse Counter: 32 bits

• Preset Value: User configurable within 32 bit counter range

• Preset Action: Settable as ON or OFF in HC Designer

Preset Action Details

• If preset action ON: Output turns ON for 1 second. Counter resets and immediately resumes counting.

• If preset action OFF: Output latches ON. Output remains ON until counter reset command. Counter counts beyond preset value.

Counter Control Functions

• Counter HOLD: Holds current value when HOLD input is ON in ControlEdge Builder

• Counter RESET: Reset via I/O data type on OFF to ON transition of RST input

• OVERFLOW Flag (STS=33): Sets when module counter overflows. Reset via OFF to ON transition on RST input

• PREI Flag: Sets when digital output of module turns ON

Frequency Input Specifications

The 900K01-0201 measures frequency across a wide range.

Frequency Input Parameters

• Input Voltage Range: 0 VDC to 24 VDC

• ON Voltage Level: 3.0 VDC minimum

• OFF Voltage Level: 1.0 VDC maximum

• Input Impedance: 25K ohm

• Frequency Range: 10 Hz minimum to 100 KHz maximum

Minimum Pulse Width by Frequency Range

• 500 μsec: For 10 Hz to 500 Hz range

• 50 μsec: For 10 Hz to 5 KHz range

• 2.5 μsec: For 10 Hz to 100 KHz range

Digital Output Behavior

• Output ON: If input frequency is out of range

• Output OFF: Normal operation (frequency within range)

Pulse Output Specifications

The 900K01-0201 can generate output pulses on any channel.

Pulse Output Parameters

• Channels Used: Any one channel can be used for pulse output

• Channel Limitation: Using a channel for output renders that input channel unusable for pulse or frequency input

• Digital Output Type: Open collector, 5 to 24V, 30 mA max

• Frequency Range: 25 Hz to 10 KHz

• Duty Cycle: Always 50%

• Pulse Output Duration: Selectable (CONTINUOUS or NUMBERED PULSES)

Status Indicators

The 900K01-0201 provides clear visual status indication.

LED Indicators

• Green Blinking LED: Indicates module is being scanned

• Red Status LED: Indicates module or channel diagnostics exist

Important Note

Quadrature signal is not supported in the current release. The module supports pulse input, frequency measurement, and pulse output functions only. Quadrature functionality may be available in future firmware releases.

Key Features

The 900K01-0201 offers three functions in a single module. Each channel supports pulse input, frequency measurement, or pulse output. The 32-bit pulse counter handles high count values. The user configurable preset value triggers actions at specific counts.

The frequency input measures from 10 Hz to 100 KHz. Three minimum pulse width settings optimize performance for different ranges. The digital output turns ON when frequency goes out of range. This provides immediate out-of-band alerting.

The pulse output generates 50% duty cycle square waves. Output frequency ranges from 25 Hz to 10 KHz. Users can select continuous or numbered pulse output duration. The open collector output supports 5 to 24V at 30mA max.

The module integrates with Honeywell ControlEdge Builder software. Counter HOLD and RESET functions are controlled via I/O data types. Status flags include OVERFLOW and PREI for diagnostic monitoring.

Installation Guidelines

Install the 900K01-0201 module in a suitable Honeywell rack. Ensure power is removed before installation. Seat the module firmly into the backplane until locked. Secure any retaining screws if present.

Connect input signals within 0 to 24 VDC range. Verify ON voltage is at least 3.0 VDC. Verify OFF voltage does not exceed 1.0 VDC. Connect open collector outputs with proper pull-up resistors.

Configure each channel for desired function in HC Designer. Set preset values and actions as needed. Select pulse output duration (continuous or numbered pulses). Do not use quadrature mode as it is not supported.

Package Contents

• Honeywell 900K01-0201 4 Channel Pulse/Frequency/Quadrature Module (1 unit)

• Module documentation

• I/O wiring guide

• Configuration instructions

Frequently Asked Questions (FAQ)

1. Does the Honeywell 900K01-0201 support quadrature input signals?
No. The 900K01-0201 does not support quadrature signals in the current release. The module supports pulse input, frequency measurement, and pulse output functions only.

2. What is the maximum pulse input frequency for this module?
The 900K01-0201 supports pulse input up to 10 KHz maximum. The minimum pulse width is 3 μsec. The pulse counter is 32 bits.

3. What is the frequency measurement range of the 900K01-0201?
The frequency input range is 10 Hz minimum to 100 KHz maximum. Minimum pulse width varies by range: 500 μsec (10-500 Hz), 50 μsec (10-5 KHz), or 2.5 μsec (10-100 KHz).

4. Can a single channel be used for both input and output on this module?
No. Using a channel for pulse output renders that channel unusable for pulse or frequency input. The 900K01-0201 requires dedicated channel assignment for each function.

5. What is the duty cycle of the pulse output signal?
The pulse output duty cycle is always 50%. Output frequency ranges from 25 Hz to 10 KHz. Output duration can be continuous or numbered pulses.