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    For your automation needs, Apter Power offers original, high-durability Madoka MR-DPD-021 relay modules to guarantee seamless connectivity and optimal system performance.

MR-DPD-021

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MADOKA MR-DPD-021 relay unit provides 24 VDC control power distribution, relay isolation, and switching functions for industrial DCS applications requiring reliable power control and electrical isolation.
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Technical specifications for MR-DPD-021

  • Manufacturer:
    MADOKA
  • Part Number:
    MR-DPD-021
  • Product Family:
    MADOKA
  • Product Type:
    Relay Unit
  • Stock:
    1
  • Overvoltage Category:
    III
  • Pollution Degree:
    2
  • Rated Voltage:
    DC 24V (Tolerance ±10%)
  • Rated Current Consumption:
    Maximum 125mA
  • Rated Power Consumption:
    3.3W
  • Relay Model: Relay Body:
    G7SA-5A1B (Omron)
  • Relay Socket:
    P7SA-14P (Omron)
  • Resistive Load *1:
    DC 30V Maximum 5A, Minimum Load 5mA
  • Inductive Load:
    DC13 Standard, DC 24V/1A, L/R=48ms
  • Initial Contact Resistance:
    Below 300mΩ
  • Action Time:
    Within 400ms
  • Response Time:
    Within 50ms
  • Contact Electrical Life:
    Over 100,000 cycles
  • Contact Mechanical Life:
    Over 10 million cycles Reliability Data: B10d DC-1 DC 30V 5A: 400,000 cycles
  • Operating temperature:
    0℃~50℃ (non-icing, non-condensation)
  • Storage temperature:
    -10℃~60℃ (non-icing, non-condensation)
  • Operating humidity:
    30~85% RH (non-icing, non-condensation)
  • Environment:
    No corrosive gases allowed
  • Altitude:
    2000m
  • Protection structure:
    IP40 (except terminal blocks and connectors)
  • Housing material:
    SPC-C, thickness 1.0mm
  • Surface treatment:
    Trivalent chromium zinc plating on the base, followed by spraying
  • Coating color:
    Nikko C version N-30
  • Weight:
    0.1 kg
  • Estimated shipping dimensions:
    8x18.6x26.1cm
  • Tariff Code:
    8471499100
  • Country of origin:
    Japan
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Environmental Class Installation Application Areas

Features:

  • Integrates 24 VDC power distribution with relay isolation and switching functions for industrial DCS applications.
  • Uses Omron G7SA-5A1B safety relays and P7SA-14P relay sockets to provide dependable electrical isolation and relay performance.
  • Combines long mechanical life, IEC vibration and shock compliance, and an IP40 metal enclosure for reliable industrial operation.
MADOKA MR-DPD-021 is designed to simplify relay-based power distribution in industrial automation systems by combining relay isolation and control power switching in one unit. The module helps separate DCS controller circuits from field equipment while distributing 24 VDC control power to connected devices. This arrangement supports stable operation of automation cabinets where reliable relay control is required.

The relay unit incorporates multiple normally open and normally closed contacts through built-in relays K1 to K6, making it suitable for power distribution, interlocking control, and equipment switching. Omron relay components contribute to consistent relay performance, while the specified load ratings allow the module to support both resistive and inductive applications commonly found in industrial installations.

MADOKA MR-DPD-021 is built for dependable operation under demanding industrial conditions. Compliance with IEC vibration and shock standards, combined with an IP40 enclosure and durable SPC-C steel housing with trivalent chromium zinc plating and sprayed surface treatment, enhances long-term reliability. The specified operating temperature, humidity, and altitude ranges allow the module to be installed in a wide variety of industrial control environments.

The MR-DPD-021 MADOKA Relay Unit may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
MADOKA MR-DPD-021 Relay Unit Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
MADOKA MR-DPD-021 Relay Unit Specs

General

  • Manufacturer MADOKA
  • Model MR-DPD-021
  • Condition New Original ready stock
  • Product Family MR-DMD-021-8A2B,MR-DPD-021-8A2B,MR-DME-C1M05
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Overvoltage Class: Class Ⅲ.
  • Pollution Class: Class 2.
  • Protection Class: IP40 (excluding terminal blocks and connector areas).
  • Applicable Altitude: ≤2000m.
  • Operating Temperature and Humidity: 0~50℃, 30~85% RH, no condensation or freezing, no corrosive gases.
  • Installation Method: Standard DIN rail snap-on installation.
  • Wiring Terminals: Compatible with 0.2~1.5mm² single-core/multi-strand cables; stranded cables require matching tubular cold-pressed terminals.
  • Cable Selection: Match conductor diameter according to load voltage, current, wiring length, and ambient temperature.
  • Load Protection: When driving inductive loads, install surge absorbers on the contact side to protect the contacts.
  • DCS Control System: Provides relay isolation between the controller and field devices while distributing 24VDC control power.
  • Industrial Power Distribution: Supports relay control power switching for automation panels and electrical cabinets.
  • Equipment Interlocking: Suitable for relay-based interlocking circuits requiring reliable contact operation.
  • Process Automation: For industrial automation systems requiring multiple relay outputs to control field devices.
Description
MADOKA MR-DPD-021 is a relay unit (Power Supply) developed for industrial automation control systems where reliable power distribution and relay isolation are required. Operating from a rated 24 VDC supply with a tolerance of ±10%, the unit combines power switching and relay control in a compact assembly while maintaining a maximum current consumption of 125 mA and power consumption of 3.3 W. Designed for Overvoltage Category III and Pollution Degree 2 environments, it supports dependable operation in industrial control cabinets.

The module incorporates Omron G7SA-5A1B relay bodies together with P7SA-14P relay sockets to provide stable switching performance. Its internal relay configuration includes 8 normally open and 2 normally closed contacts together with an additional 4 normally open and 2 normally closed contacts through built-in relays K1 to K6. The relay outputs provide electrical isolation between the DCS controller and field equipment while distributing 24 VDC control power for interlocking and power control applications.

MADOKA MR-DPD-021 supports resistive loads up to DC 30 V, 5 A with a minimum switching load of 5 mA, while inductive loads comply with the DC13 standard at DC 24 V, 1 A with an L/R value of 48 ms. The relay offers an action time within 400 ms and a response time within 50 ms. Initial contact resistance remains below 300 mΩ, while electrical contact life exceeds 100,000 operations and mechanical life exceeds 10 million cycles. Reliability data includes a B10d rating of 400,000 cycles for DC-1 at DC 30 V, 5 A and 3,000,000 cycles for DC-13 at DC 24 V, 1 A.

MADOKA MR-DPD-021 complies with IEC60068-2-6 vibration requirements and IEC60068-2-27 shock requirements for dependable industrial operation. The unit operates between 0°C and 50°C with non-icing and non-condensing conditions, while storage temperatures range from -10°C to 60°C. Operating humidity is specified from 30% to 85% RH without condensation, and installation is suitable up to an altitude of 2000 m. An IP40 enclosure, except for terminal blocks and connectors, together with a 1.0 mm SPC-C steel housing featuring trivalent chromium zinc plating and sprayed coating, provides durability for industrial environments free from corrosive gases.
Alternative Names
MRDPD021 MR-DPD-02I MR-DPD-O21 MR-DPD-021-8A2B MR-DMD-021-8A2B MR-DME-C1M05 MR-DME-C12M05 MR-DPE-C2M05
Technical notes
The MADOKA MR-DPD-021 relay unit serves as a robust control interface, reliably switching heavy electrical loads up to 16A at 250VAC. Engineered for seamless system integration, this model guarantees an electrical lifespan of over 100,000 cycles under full rated operating conditions.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Why does MADOKA MR-DPD-021 use Omron safety relays?
The module incorporates Omron G7SA-5A1B relay bodies and P7SA-14P relay sockets to improve switching reliability while providing electrical isolation in industrial control systems.
Does MADOKA MR-DPD-021 offer long relay service life?
Electrical contact life exceeds 100,000 switching cycles, mechanical life exceeds 10 million cycles, and the relay provides B10d reliability ratings for both DC-1 and DC-13 operating conditions.
Which environmental conditions support MADOKA MR-DPD-021 operation?
The unit operates from 0°C to 50°C with humidity between 30% and 85% RH under non-condensing conditions and supports installation at altitudes up to 2000 m in environments without corrosive gases.
How quickly does MADOKA MR-DPD-021 respond during switching?
The relay provides an action time within 400 ms and a response time within 50 ms, allowing reliable switching for industrial control applications.

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