Autonics MT4W Series 4-Digit Multi Panel Meters

Introduction

Thank you for choosing an Autonics product. Please read and understand this instruction manual thoroughly before using the product. For your safety, observe all safety considerations provided.

Keep this manual in an easily accessible place. Specifications and dimensions are subject to change without notice for product improvement. Visit the Autonics website for the latest information.

Safety Considerations

Warning: Failure to follow instructions may result in serious injury or death.

• Install fail-safe devices when using the unit with machinery that may cause serious injury or substantial economic loss.
• Do not use the unit in environments with flammable/explosive/corrosive gas, high humidity, direct sunlight, radiant heat, vibration, impact, or salinity.
• Install on a device panel for use.
• Do not connect, repair, or inspect the unit while it is connected to a power source.
• Check 'Connections' before wiring.
• Do not disassemble or modify the unit.

Caution: Failure to follow instructions may result in injury or product damage.

• When connecting power/measurement input and relay output, use AWG 24 (0.20 mm²) to AWG 15 (1.65 mm²) cable and tighten the terminal screw with a torque of 0.98 to 1.18 N m.
• Use the unit within the rated specifications.
• Use a dry cloth to clean the unit; do not use water or organic solvent.
• Keep the product away from metal chips, dust, and wire residue.

Cautions during Use

• Power supply should be insulated and limited voltage/current or Class 2, SELV.
• Install a power switch or circuit breaker for easy power supply/disconnection.
• Use twisted pair wire for communication lines.
• Keep away from high voltage lines or power lines to prevent inductive noise. Use line filters or varistors on power lines and shielded wire for input signal lines if installed closely.
• Do not use near equipment generating strong magnetic force or high-frequency noise.

This unit may be used in indoor environments with conditions rated in 'Specifications', altitude max. 2,000 m, pollution degree 2, and installation category II.

Product Overview

Ordering Information

Model structure: MT 4W - ❶ - ❷ ❸

• ❶ Input type: DV (DC voltage), DA (DC current), AV (AC voltage), AA (AC current)
• ❷ Power supply: 1 (12-24 VDC), 4 (100-240 VAC)
• ❸ Preset output + Sub output: Options include None (indicator), Relay, NPN/PNP open collector, BCD Dynamic, Transmission (DC 4-20 mA), Low speed serial, RS485 Communication.

Note: For frequency display, no output is provided even if the model supports output.

Product Components

• Product
• Bracket × 2
• Instruction manual
• Unit sticker × 1

Dimensions

Unit: mm

Indicator / Relay preset output model: 96 x 45 mm (main unit), 96 x 48 mm (front panel)

NPN / PNP open collector preset output model: 96 x 45 mm (main unit), 96 x 48 mm (front panel)

Bracket: 73 x 45 mm

Panel cut-out: 92+0.8/0 x 45+0.6/0 mm

Connections

Cautions during Wiring: Use copper-conductor wire with a temperature class of 60 ℃. Use terminals of the specified size. Contact the manufacturer for socket and cable information.

Input Connections

• DC voltage: Supports various ranges from 50 mVDC to 500 VDC.
• DC current: Supports various ranges from 2 mA to 5 A.
• AC voltage: Supports various ranges from 1 VAC to 500 VAC.
• AC current: Supports various ranges from 50 mA to 5 A.

Output Connections

• 0: Relay + Transmission (DC 4-20 mA): Relay contact: 250 VAC 3A 1a. Transmission output: DC 4-20 mA (Load ≤ 600 Ω).
• 1: Relay: Relay contact: 250 VAC 3A 1a.
• 2: NPN open collector + BCD Dynamic: Main OUT: NPN open collector (12-24 VDC, Max. 50 mA).
• 3: PNP open collector + BCD Dynamic: Main OUT: PNP open collector (12-24 VDC, Max. 50 mA).
• 4: NPN open collector + Transmission (DC 4-20 mA): Main OUT: NPN open collector (12-24 VDC, Max. 50 mA). Transmission output: DC 4-20 mA (Load ≤ 600 Ω).
• 5: PNP open collector + Transmission (DC 4-20 mA): Main OUT: PNP open collector (12-24 VDC, Max. 50 mA). Transmission output: DC 4-20 mA (Load ≤ 600 Ω).
• 6: NPN open collector + Low speed serial: Main OUT: NPN open collector (12-24 VDC, Max. 50 mA).
• 7: PNP open collector + Low speed serial: Main OUT: PNP open collector (12-24 VDC, Max. 50 mA).
• 8: NPN open collector + RS485 Comm.: Main OUT: NPN open collector (12-24 VDC, Max. 50 mA). RS485 communication.
• 9: PNP open collector + RS485 Comm.: Main OUT: PNP open collector (12-24 VDC, Max. 50 mA). RS485 communication.

Specifications

General

• Model: MT4W-DV-□□, MT4W-DA-□□, MT4W-AV-□□, MT4W-AA-□□
• Input type: DC voltage, DC current, AC voltage, AC current
• Max. allowable input: 110% F.S. for each measured input range
• Display method: 7-segment (red) LED (character height: 14.2 mm)
• Display accuracy: Varies with ambient temperature. At 23 ± 5 ℃: ± 0.1% F.S. rdg ± 2 digit (DC/AC voltage), ± 0.3% F.S. rdg ± 3 digit (AC current). At -10 to 50 ℃: ± 0.5% F.S. rdg ± 3 digit.
• Max. display range: -1999 to 9999 (4 digit)
• A/D conversion method: ΣΔ (Sigma Delta) ADC
• Sampling cycle: 50 ms (DC), 16.6 ms (AC)
• Unit weight (packaged): ≈ 211 g (≈ 326 g)
• Approval: CE, UL, CUL

Preset Output

• Relay: Contact capacity: 250 VAC 3A, 30 VDC 3A (N.O. contact).
• NPN/PNP open collector: Output capacity: ≤ 12-24 VDC ± 2 VDC, 50 mA resistive load.

Sub Output

• BCD Dynamic / Low speed serial: NPN open collector output (Output capacity: ≤ 12-24 VDC, 50 mA resistive load).
• Transmission (DC 4-20 mA): Resolution: 1/12,000 (load resistance ≤ 600 Ω). Response time: ≤ 450 ms.
• RS485 communication: Protocol: Modbus RTU.

Power Supply

• Model: MT4W-□□-1□, MT4W-□□-4□
• Power supply: 12-24 VDC ± 10% or 100-240 VAC ± 10% 50/60 Hz
• Power consumption: 5 W or 5 VA

Environmental and Electrical Characteristics

• Insulation resistance: ≥ 100 MΩ (500 VDC megger)
• Dielectric strength: 2,000 VAC for 1 min
• Noise immunity: ± 2 kV square wave noise
• Vibration: 0.75 mm double amplitude (10-55 Hz)
• Shock: 300 m/s² (≈ 30 G)
• Relay life cycle: Mechanical: ≥ 20,000,000 operations; Electrical: ≥ 100,000 operations (250 VAC 3A resistive load)
• Ambient temperature: -10 to 50 ℃
• Ambient humidity: 35 to 85 %RH
• Insulation type: Double or reinforced insulation

Parameter Settings

Access parameter groups by holding the [MODE] key. Parameters are saved upon pressing [MODE]. Use [◀], [▲], [▼] keys to navigate and change settings. If no key is pressed for 60 seconds, the unit returns to RUN mode.

Parameter 1 group

• 1-1 Input range (IN-R): Sets the input range (e.g., 500V, 5A).
• 1-2 Display method (DISP): STND (standard), SCAL (scale), FREQ (frequency).
• 1-3 Measurement method (IN-T): tRMS (True RMS), A.RMS (Average RMS).
• 1-4 Max. display value (fixed): Sets the maximum display value.
• 1-5 High-limit display value gradient correction (INbH): Adjusts display value against max. measurement input.
• 1-6 Low-limit display value deviation correction (INbL): Adjusts display value deviation.
• 1-7 Decimal point position (DOT): Sets the decimal point position.
• 1-8 High-limit scale (H-SC): Display value against max. measurement input.
• 1-9 Low-limit scale (L-SC): Display value against min. measurement input.
• 1-10 High-limit display value gradient correction (INbH): Adjusts display value against max. measurement input.
• 1-11 Low-limit display value deviation correction (INbL): Adjusts display value deviation.
• 1-12 Decimal point position (DOT): Sets the decimal point position.
• 1-13 High-limit display value gradient correction (INbH): Adjusts display value.
• 1-14 Exponent of INB (INbE): Sets the exponent for display scaling.

Parameter 2 group

• 2-1 Output operation mode (OUtT): OFF, L.ST, H.ST, LH.ST, HH.ST, LL.ST, LD.ST.
• 2-2 Hysteresis (HYS): Sets hysteresis value (within 10% of max. display range).
• 2-3 Startup compensation time (STaT): Sets startup delay (0.0 to 99.9 sec).
• 2-4 Peak monitoring delay time (PEkT): Sets delay for peak monitoring (00 to 30 sec).
• 2-5 Display cycle (DIsT): Sets display update cycle (0.1 to 5.0 sec).
• 2-6 Keys for zero adjustment (ZERO): NO or YES.
• 2-7 External input terminal (EVLN): HOLD or ZERO.
• 2-8 High-limit value of transmission output (FS-H): Sets max. value for transmission output.
• 2-9 Low-limit value of transmission output (FS-L): Sets min. value for transmission output.
• 2-10 Comm. Address (ADRS): Sets communication address (01 to 99) for RS485 models.
• 2-11 Comm. speed (BPS): Sets communication speed (e.g., 9600, 38.4k bps) for RS485 models.
• 2-12 Parity bit (PRTY): Sets parity bit (NONE, EVEN, ODD) for RS485 models.
• 2-13 Stop bit (STP): Sets stop bit (1 or 2 bits) for RS485 models.
• 2-14 Response waiting time (RSwT): Sets response waiting time (5 to 99 sec) for RS485 models.
• 2-15 Lock (LOC): OFF (unlock), LOC1, LOC2, LOC3 (lock parameters).

Parameter 0 group

• 0-1 Output high limit output setting value (hSET): Sets high limit for preset output.
• 0-2 Output low limit output setting value (lSET): Sets low limit for preset output.
• 0-3 Display max. peak value (hPEK): Displays max. peak value in RUN mode.
• 0-4 Display min. peak value (lPEK): Displays min. peak value in RUN mode.

Input Range and Display Range

Detailed tables show input ranges and corresponding display ranges for DC voltage, DC current, AC voltage, and AC current models. Ensure the input value is within 30% to 100% of the input range for optimal accuracy.

Reset and Error Handling

Reset

To reset all parameters to default values: Press [◀] + [▲] + [▼] for over 5 sec. in RUN mode. Follow on-screen prompts to confirm the reset.

Error

Errors are released automatically when the input is within the measurable range.

• HHHH: Measurement input exceeded max. allowable input. Check cables.
• LLLL: Measurement input exceeded min. allowable input.
• D-HH: Display input exceeded high-limit scale or max. display range.
• D-LL: Display input exceeded low-limit scale or min. display range.
• F-HH: Input frequency exceeded max. display value.
• OVER: Exceeded zero range (±99).

Output Operation Mode

The output operation mode determines how the preset outputs (HI, GO, LO) function based on the display value and hysteresis settings. Modes include OFF, L.ST, H.ST, LH.ST, HH.ST, LL.ST, LD.ST.

Communication Interface

RS485

• Comm. protocol: Modbus RTU
• Application standard: EIA RS485
• Max. connection: 31 units
• Comm. method: 2-wire half duplex
• Comm. distance: ≤ 800 m
• Comm. speed: 1,200 to 38,400 bps
• Parity bit: None, Even, Odd
• Stop bit: 1-bit, 2-bit

Software

Download the installation file and manuals from the Autonics website. DAQMaster is a comprehensive device management program for parameter setting, monitoring, and data management.

Contact Information

Autonics, 18, Bansong-ro 513Beon-gil, Haeundae-gu, Busan, Republic of Korea, 48002

Website: www.autonics.com

Phone: +82-2-2048-1577

Email: sales@autonics.com