Autonics MT4W-AV-41 AC Voltmeter Digital Panel Meter
The Autonics MT4W-AV-41 is a 4-digit digital panel meter designed for accurate measurement and monitoring of AC voltage and frequency in industrial electrical and automation systems. It supports multiple AC voltage input ranges up to 500 VAC, features a bright LED display, HI, GO and LO relay outputs, and operates on a 100 to 240 VAC power supply. Its 96 x 48 mm panel format makes it suitable for electrical panels, machinery, control cabinets, and industrial monitoring applications.
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A. Product Overview
The Autonics MT4W-AV-41 AC Voltmeter Digital Panel Meter is part of the MT4W series of industrial panel meters. It is designed to display AC voltage and frequency values while also providing comparative relay outputs that can be used for alarm or control functions.
The unit provides a clear 4-digit LED indication so operators can monitor electrical parameters directly from the front of a control panel.
Key Specifications
Brand: Autonics
Model: MT4W-AV-41
Product Type: Digital Panel Meter
Measurement: AC Voltage and Frequency
Display: 4-digit 7-segment LED
Character Height: 14.2 mm
Maximum Display Range: -1999 to 9999
Maximum AC Voltage Input: Up to 500 VAC
AC Voltage Input Ranges: 0 to 1 V, 0 to 2 V, 0 to 10 V, 0 to 20 V, 0 to 50 V, 0 to 110 V, 0 to 250 V and 0 to 500 V
AC Measurement: Average value and RMS measurement
Power Supply: 100 to 240 VAC, 50 or 60 Hz
Main Output: Relay output
Comparative Outputs: HI, GO and LO
Sampling Cycle: 16.6 ms
External Hold Function: Available
Front Protection: IP56
Operating Temperature: -10°C to 50°C
Storage Temperature: -20°C to 60°C
Operating Humidity: 35 to 85 percent RH
Panel Size: Approximately 96 x 48 mm
Panel Cutout: Approximately 92 x 45 mm
The MT4W-AV-41 combines measurement, digital indication, and relay based limit monitoring in a single panel mounted instrument.
B. Working Principle
The Autonics MT4W-AV-41 works by receiving an AC voltage input from the electrical system being monitored.
The input signal is converted internally into a digital measurement using an analog to digital conversion system. The processed value is then displayed on the 4-digit LED screen.
For example, if the meter is connected to a 230 VAC electrical supply, it continuously measures the incoming voltage and displays the corresponding voltage value.
The meter can also measure the frequency of the AC signal.
The basic operating sequence is:
AC voltage is connected to the measurement input.
The MT4W-AV-41 samples the electrical signal.
The internal circuit converts the signal into a digital value.
The measured voltage or frequency is shown on the LED display.
The measured value is compared against configured limits.
The HI, GO or LO relay output operates according to the measured condition.
This means the meter can perform both measurement and limit monitoring.
For example, an operator can configure a voltage monitoring application where:
LO indicates that voltage is below the required limit
GO indicates that voltage is within the acceptable range
HI indicates that voltage has exceeded the specified limit
The relay outputs can then be incorporated into alarm, indication, interlock, or control circuits.
C. Why Is Autonics MT4W-AV-41 Used?
The Autonics MT4W-AV-41 digital AC voltmeter is used when accurate and easily visible monitoring of AC voltage is required inside an industrial electrical panel.
Traditional analog voltmeters use a moving pointer and scale. A digital panel meter provides a direct numerical reading, making it easier for operators to identify voltage variations.
The MT4W-AV-41 is particularly useful because it combines AC voltage measurement, frequency measurement, digital display, and comparative relay outputs.
Common Applications
Electrical control panels
Industrial automation panels
Machine control panels
Power distribution panels
Generator panels
Motor control panels
Compressor panels
Pump control systems
HVAC control panels
Packaging machinery
Manufacturing equipment
Conveyor systems
OEM machines
Electrical testing systems
Voltage monitoring systems
Industrial process equipment
Example Application
Suppose a machine is designed to operate correctly at approximately 230 VAC.
The MT4W-AV-41 can continuously display the incoming AC voltage. If the voltage goes outside the configured acceptable range, its comparative relay output can be used to activate an alarm or provide a signal to the control system.
This gives operators both a visible measurement and a control signal for abnormal voltage conditions.
D. Suitable Buyers
The Autonics MT4W-AV-41 AC Voltmeter Digital Panel Meter is suitable for:
Control panel manufacturers
Electrical panel builders
Industrial automation companies
Machine manufacturers
OEM machine builders
System integrators
Electrical contractors
Maintenance engineers
Automation engineers
Electrical engineers
Manufacturing industries
Process industries
Factory maintenance departments
HVAC panel manufacturers
Pump panel manufacturers
Compressor manufacturers
Generator panel manufacturers
Industrial equipment manufacturers
It is particularly suitable for buyers requiring a 96 x 48 mm digital AC voltmeter with relay outputs for industrial panel mounting.
Frequently Asked Questions
1. What is the Autonics MT4W-AV-41?
The Autonics MT4W-AV-41 is a digital panel meter designed primarily for measuring and displaying AC voltage and frequency in industrial electrical and automation systems.
2. What does the MT4W-AV-41 measure?
The MT4W-AV-41 measures:
AC voltage
AC frequency
It can therefore be used for both voltage monitoring and frequency monitoring applications.
3. What is the maximum AC voltage range of the MT4W-AV-41?
The MT4W-AV-41 supports AC voltage measurement ranges up to 500 VAC.
4. What AC voltage input ranges are available?
Supported ranges include:
0 to 1 VAC
0 to 2 VAC
0 to 10 VAC
0 to 20 VAC
0 to 50 VAC
0 to 110 VAC
0 to 250 VAC
0 to 500 VAC
The appropriate configuration should be selected according to the application.
5. What is the display type of the MT4W-AV-41?
It uses a 4-digit 7-segment LED display with approximately 14.2 mm character height.
6. What is the maximum display range?
The maximum numerical display range is approximately -1999 to 9999.
7. What is the power supply requirement?
The MT4W-AV-41 operates from a 100 to 240 VAC, 50 or 60 Hz power supply.
8. Does the MT4W-AV-41 have relay output?
Yes. The MT4W-AV-41 provides comparative relay outputs for HI, GO and LO conditions.
9. What do HI, GO and LO mean?
These outputs represent comparison conditions:
HI: Measured value is above the configured upper limit.
GO: Measured value is within the configured acceptable range.
LO: Measured value is below the configured lower limit.
These outputs can be incorporated into alarm and control circuits.
10. Can the MT4W-AV-41 be used as an overvoltage alarm?
Yes. Its comparative relay output can be configured as part of a system that provides an alarm or control signal when voltage exceeds the required limit.
11. Can it be used for undervoltage monitoring?
Yes. The LO comparative output can be used in an appropriate control circuit to indicate when the measured voltage drops below a configured limit.
12. Can the MT4W-AV-41 measure frequency?
Yes. In addition to AC voltage, the meter can measure the frequency of the AC input signal.
