FRER MCOMV 48VDC DC Voltage Isolation Transducer

Бренд: FRER (Италия)

Полная модель: MCOMV, Input 0~48VDC, DIN rail mounted DC voltage isolation transducer. It converts DC voltage signal into standard 4-20mA analog signal for ПЛК/DCS system acquisition.

Основные параметры (MCOMV;48В постоянного тока)

Вход: 0 ~ 48V DC (50% overload capability)

Выход: 0~20 мА / 4~20 мА (Standard industrial current loop)

Max Output Load: 750Ой

Auxiliary Supply: 20~60Vac/dc (Wide AC/DC power supply); 220VDC version available as option

Изоляция: Input-Output-Power three-way galvanic isolation

Монтаж: DIN rail snap mounting

Класс точности: 0.5

Время ответа: <200РС

Приложение: DC busbar, battery pack, -48V telecom power cabinet voltage measurement

Определение модели

MCOMV: FRER legacy model code for DC voltage transducer; new replacement series MCOVC

;48В постоянного тока: Input range 0~48V DC

Other ranges available in same series: MCOMV;60mV DC, MCOMV;60В постоянного тока, MCOMV;300В постоянного тока

Типичные применения

1. -48V battery bank voltage monitoring for telecom base stations
2. DC panel & energy storage cabinet DC bus voltage acquisition
3. Industrial power supply & electrochemical power source voltage transduction
4. DC system signal isolation measurement in power plants & заводы

Сменные модели

Original manufacturer upgrade: MCOVC1 (for MCOMV 0~300V), MCOVC2 (Dual retransmission output)

Отечественные альтернативы: Феникс Контакт, Пепперл+Фукс, Suzhou Xunpeng and other DC voltage isolation transducers (0-48В-вход, 4-20mA output)

Рекомендации по подключению проводов

1. Входная сторона: DC voltage signal, observe polarity strictly
2. Выходная сторона: 4-20mA current loop, connect to AI module, normally 2-wire connection at PLC side
3. Auxiliary power: 20~60V AC/DC wide range, compatible with 24V/48V DC panel & 220 В переменного тока

Важное отличие: MCOV (SPD maximum continuous operating voltage) ≠ MCOMV (FRER transducer). Abbreviation confusion frequently occurs.

FRER MCOMV;48VDC Complete Datasheet Parameter Table

Продукт: DC voltage isolation transducer (Obsolete legacy MCOMV, replacement series MCOVC)

Определение модели: MCOMV = DC voltage transducer; ;48VDC = Input range 0~48VDC

🔹 Electrical Specifications

🔹 Environmental Conditions

🔹 Mechanical & Корпус

🔹 Model Portfolio (Available Ranges of MCOMV Series)

🔹 Safety & Стандарты

Сертификация: CE, Соответствует EN 61010-1

Защита: Output current limiting, limited reverse polarity protection for input

Категория приложения: Industrial DC busbar, telecom -48V battery pack, DC panel voltage acquisition

🔹 Wiring Summary

1. Вход + / Вход -: Measured DC voltage, strict polarity observation required
2. Выход + / Выход -: 4~20mA current loop, two-wire connection to PLC AI channel
3. К + / К -: Transducer auxiliary power supply 20~60V AC/DC

🔹 Model Change Note

MCOMV is legacy FRER code, прекращено. Direct OEM replacement: MCOVC1 (single channel DC voltage transducer) with identical specs, pin assignment and mounting dimension.

🔹 Troubleshooting Reference

1. Нет вывода: Check auxiliary power, герметичность клемм, input polarity
2. Fixed 4mA output: Input open circuit or signal below lower limit
3. Output stuck at 20mA: Over-range input or shorted input wiring
4. Чтение дрейфа: Check ground interference and verify isolation integrity

FRER MCOMV;48VDC Calibration Description

Заключение: Metrological calibration is available for certification; No external zero/span trim potentiometer on unit. On-site opening and adjustment of zero/span are prohibited. It is a factory-calibrated analog isolation transducer.

1. Класс точности & Calibration Differentiation

Nameplate marked Class 0.5: Maximum permissible full scale error ±0.5%FS under reference condition 25℃.

✅ Metrological Calibration (Permitted):

Use standard DC voltage source + high precision milliammeter for multi-point comparison test at 0%, 25%, 50%, 75%, 100%. Can be sent to 3rd-party metrology laboratory for calibration certificate, to verify whether performance remains within Class 0.5.

❌ On-site trimming (Not Supported):

No external Zero / Span access hole on MCOMV legacy housing; PCB trim potentiometers are factory locked. Manufacturer does NOT recommend opening housing for on-site adjustment. Opening voids factory warranty and damages insulation isolation structure, degrading 2.5kV isolation safety rating.

2. Calibration Test Procedure (Lab / Site Comparison, Test Only, No Adjustment)

DUT: MCOMV;48В постоянного тока (0~48VDC Input →4~20mA Output)

1. Connect auxiliary power 20~60V DC, warm up ≥15 minutes
2. Apply DC voltage sequentially via standard source: 0В, 12В, 24В, 36В, 48В

0V → Theoretical output 4.000 мА

48V → Theoretical output 20.000 мА

3. Insert high precision milliammeter in series into current loop, record As-Found error for each point
4. Pass Criterion: Error ≤ ±0.5%FS for all test points

Full scale span: 16mA corresponds to 48V; 1%FS = 0.16mA

3. Remedial Actions If Drift Exceeds Tolerance

If calibration shows error out of Class 0.5 терпимость:

1. Replacement preferred (MCOMV discontinued). Recommended upgrade MCOVC1;48В постоянного тока, приколоть & dimension compatible;
2. Return to FRER factory for re-calibration (высокая стоимость & long lead time);
3. Domestic alternative transducers: Equipped with external Z/S potentiometer, field zero & span adjustment available.
4. Calibration Feature of New MCOVC (MCOMV Replacement)

MCOVC series also has no external zero/span potentiometer, factory calibrated only, metrological verification permitted, no hardware trimming on site.

5. Recommended Calibration Interval

For DC panel, telecom -48V battery monitoring, power plant applications requiring traceable metrology: Annual calibration every 12 месяцы.

FRER MCOMV;48VDC Accuracy Calibration Precautions

Core Recap: Only metrological verification allowed (accuracy validation). No external zero/span trim potentiometer. Opening enclosure for adjustment forbidden; Сорт 0.5, tolerance ±0.5%FS full scale.

1. Условия окружающей среды (Invalid Calibration If Not Satisfied)
2. Температура окружающей среды: Prefer 25℃±2℃ constant temperature; record actual temperature if test off-nominal. Temperature drift ≤100ppm/℃ will introduce extra error.
3. Влажность: 5%~95% относительной влажности, конденсация запрещена. Condensation reduces isolation voltage, causes leakage error or permanent damage.
4. EM Environment: Keep away from VFD, контакторы, high-power cables and strong magnetic field. Heavy interference leads to 4~20mA jitter and false failure judgement.
5. Stabilization: Mount transducer on DIN rail, power on and warm up ≥15min until thermal stabilization before reading.
6. Standard Instrument Requirements (Reference instrument accuracy better than DUT)

For Class 0.5 transducer, follow the 1/3 rule (instrument uncertainty ≤1/3 of DUT allowable error)

1. Standard DC Voltage Source: Accuracy better than 0.15 сорт, 0~48VDC output, low ripple
2. Standard Milliammeter: DC current measurement accuracy better than 0.15 сорт, connected in series in current circuit
3. General multimeter cannot be primary standard (insufficient accuracy), only auxiliary reference

Instruments must be within valid calibration period with certificate to ensure metrology traceability.

III. Электропроводка & Power Supply Notes

1. Вспомогательная мощность: Stable 20~60V DC supply with low ripple. Avoid unstable switching power supply for temporary test. Fluctuating supply introduces output drift.
2. Входная цепь: Strict polarity for input +/-; limited reverse protection exists but long-time reverse energizing not recommended. Keep input wiring short; shielded cable with single-end grounding to reduce common-mode interference.
3. Output Current Loop

Insert standard ammeter in series within 4~20mA loop

Total loop resistance shall not exceed 750Ω (ammeter internal resistance + cable resistance). Excessive load prevents reaching 20mA full scale and leads to false failure.

Tight wiring terminals; loose contact causes reading fluctuation.

4. Заземление: Avoid multiple grounding for transducer, standard source and meters to prevent ground loop and common-mode voltage measurement error.
5. Калибровочные точки & Руководство по эксплуатации

Recommended test points: 0В, 12В, 24В, 36В, 48В (0%, 25%, 50%, 75%, 100%ФС)

1. Upscale test: Ramp input from 0V up to full scale 48V, record output for each point
2. Downscale test: Ramp down from 48V to 0V for return test and hysteresis error inspection
3. Wait 3~5 seconds at each test point for reading stabilization before recording
4. Do not continuously apply full 48V for long duration. Though 50% continuous overload is supported, long overvoltage accelerates aging. Transient 2× overload only for impulse test and not used for accuracy calibration.
5. Error Calculation: FS =16mA full scale span. Error=(Measured Value − Theoretical Value)/FS ×100%. Criterion ±0.5%FS.
6. Безопасность & Защита оборудования
7. Three-way Isolation: Вход, output and power isolated at 2.5kV. Do NOT short input and output during test, isolation structure will be damaged.
8. Enclosure opening prohibited: Internal PCB potentiometer factory locked. Opening destroys insulation, voids warranty and compromises isolation rating with safety hazard. Even if trimmed, FRER factory does not recognize field adjustment, and metrology certificate will not accept on-site hardware modification.
9. Moderate torque on terminal screws; avoid over-tightening which strips threads and damages PCB.
10. Data Recording, Judgement & Disposition
11. Record items: Температура окружающей среды & влажность, instrument ID/certificate number, auxiliary supply voltage, forward/backward readings of all points and calculated error
12. Pass Criterion: All forward & return test point errors ≤ ±0.5%FS to be qualified; hysteresis error recorded together
13. Out-of-tolerance handling: No on-site correction possible for this device. Параметры: Replace with MCOVC1;48VDC compatible model or return to factory for recalibration. Do NOT use PLC AI channel software offset compensation as substitution of transducer calibration (only temporary engineering compensation and not accepted as metrology compliance evidence).

VII. Распространенные ловушки

❌ Use PLC built-in AI reading as calibration reference: PLC AI module has inherent error and cannot serve as metrology standard

❌ Neglect load resistance: Loop total resistance＞750Ω, full scale cannot reach 20mA and false failure occurs

❌ Read data without warm-up: Components thermally unstable, temperature drift error introduced

❌ Multiple grounding, ground loop interference and output fluctuation

❌ Open housing and adjust internal potentiometer: Not accepted by metrology and isolation invalidated

Cross-Brand Model Comparison Table for MCOMV;48В постоянного тока (FRER)

Original Spec: Крепление на DIN-рейку, 0~48VDC input /4~20mA output, 3-способ гальванической развязки (Input/Output/Power), Сорт 0.5, К. Supply 20~60VAC/DC, Max Load 750Ω, No external zero/span adjustment

Selection Priority: OEM Upgrade Import Equivalent Domestic Industrial Grade (Field Z/S adjustable, preferred for engineering replacement)

Brand Recommended Model Key Matching Points Differences Application Scenario
FRER (OEM) MCOVC1;48VDC Fully compatible;0~48VDC,4-20мА,3-way isolation,22.5mm narrow DIN rail,20~60V AC/DC supply,Class0.5;Приколоть & dimension match Still no external potentiometer, factory calibrated, no field trimming Retrofit cabinet where terminal layout cannot be modified, projects requiring metrology certification
Phoenix MACX MCR-VAC (Config: DC 0~48V,4-20мА) 3-way isolation, Class0.5, DIN-рейка, wide supply Module width12.5mm, software configurable range, field calibration available. Default 24VDC supply, wide voltage version on special order PLC/DCS cabinet, high EMC environment, power station DC panel
Pepperl+Fuchs KFD2-VR4-EX1.20 (Custom input 0~48VDC) 3-way isolation,4-20mA output, high industrial noise immunity Standard model defaults to 0~10V, factory customized input range required;Class0.5;Higher price Explosion-proof area, накопитель энергии, telecom -48V monitoring
Acrel BM-DV/I, 0~48VDC input,4-20mA output 3-way isolation,Class0.5,DIN rail,22.5мм,20~60V AC/DC supply,built-in Zero/Span trim potentiometer Domestic brand, field zero & span adjustable;Cost advantage;2.5kV isolation same as FRER Telecom -48V battery,DC panel,batch replacement,field calibration required
Suzhou Xunpeng WP-V,0~48VDC,4-20mA 3-way isolation,Class0.5,DIN rail,wide supply,external zero/span potentiometer Domestic, экономически эффективный, metrology certifiable,short procurement lead time Factory technical renovation,bulk transducer replacement
CZ3076 (Custom range 0~48VDC) 1in1out voltage isolation transducer,3-way isolation,4~20mA output,Class0.5 Programmable range,externally adjustable;Strong EMC 12.5mm slim DIN module;Default 24VDC supply,wide voltage optional DCS cabinet,multi-signal centralized acquisition

Selection Priority Description

1. Minimum modification replacement (no terminal rewiring recommended)

FRER MCOVC1;48В постоянного тока, direct plug-in replacement for MCOMV;48В постоянного тока, identical housing width, terminal assignment and electrical parameters; Ограничение: still no field zero/span trimming, lab metrology verification only.

2. Preferred for field maintenance (Acrel BM-DV/I recommended)

Matched specs, built-in zero/span potentiometer, on-site calibration available when out of tolerance, solving MCOMV limitation of no field adjustment; 2.5kV isolation meets DC panel & telecom power metrology requirement.

3. High EMC Imported Premium Application

М-СИСТЕМА, Phoenix MACX series with superior EMC performance, but different terminal layout and module width, cabinet terminal rewiring required, cannot plug & play.

Краткое описание ключевых отличий (For Technical Specification Comparison)

1. Calibration Capability

FRER MCOMV / MCOVC: No external Z/S, metrology verification only, No field hardware adjustment

Acrel/Xunpeng/CZ: External zero & span potentiometer, Field calibration available

Phoenix/M-SYSTEM: Software configuration calibration

2. Источник питания

FRER: 20~60V AC/DC wide range; Most imported & domestic standard models default to 24VDC, wide voltage version must be specified at order.

3. Ширина модуля

FRER original unit: 22.5мм; Финикс & CZ slim type:12.5мм, less DIN rail slot consumption.

Mandatory Order Remarks (Prevent Wrong Range Shipment)

Must specify below items on PO for all replacement models:

DC Voltage Input:0~48VDC; Выход:4~20 мА; 3-способ гальванической развязки; Монтаж на DIN-рейку; Класс точности 0.5; Вспомогательная мощность:20~60VAC/DC