D26MR40A EATON

D26MR40A EATON Operator unit 

Product  Description：

The D26MR40A is a multipole, DC-powered industrial relay designed for high-cycle applications. The "MR" designation identifies it as a Master Relay with a DC coil, and the "40" indicates its specific contact configuration of 4 Normally Open (NO) poles. It features a modular, rugged design that allows for significant customization; for example, the contact poles are field-convertible, and the relay can be expanded with additional decks. Its construction is centered around a heavy-duty frame and a precision-wound coil, ensuring that the relay provides consistent switching times across its entire operational life.

Product Parameters

• Coil Operating Voltage: $120 \text{ VDC}$ (nominal).

• Contact Configuration: 4 Normally Open (4NO) fixed poles.

• Thermal Current Rating: $10 \text{ A}$ continuous (NEMA A600 rating for AC, P600 for DC).

• Maximum Voltage: Rated for up to $600 \text{ V}$ insulation.

• Mechanical Operations: Rated for over 10 million cycles under standard conditions.

• Coil Power Consumption: Typically around $7 \text{ to } 10 \text{ Watts}$ for sealed operation.

• Mounting Style: Standard surface mounting via screws, typically within a NEMA-rated enclosure or on a sub-panel.

• Certifications: UL listed, CSA certified, and compliant with NEMA industrial standards.

Product Advantages

A primary advantage of the D26MR40A is its Field-Convertible Contacts. Each pole can be easily changed from Normally Open (NO) to Normally Closed (NC), providing immense flexibility for last-minute circuit modifications without needing to purchase new parts. The Compact Footprint allows for a high density of control logic within an electrical cabinet, which is critical for complex machinery.

The relay is also known for its High Reliability in Harsh Conditions; it is designed to resist the effects of dust, oil mist, and vibrations commonly found in heavy industrial plants. Additionally, the Modular Expansion Capability means that users can add a second deck of contacts or a pneumatic timer attachment directly to the top of the base relay, making it one of the most versatile control components in the Eaton portfolio.

Important Considerations and Precautions

When installing the D26MR40A, it is vital to ensure that the Control Voltage is Stabilized. DC coils are sensitive to voltage drops; if the voltage falls below 80% of the nominal $120 \text{ VDC}$, the relay may "chatter" or fail to pull in, which can cause excessive heat and contact welding. Polarity Sensitivity must also be observed depending on whether surge suppression modules are installed across the coil.

Maintenance personnel should regularly check for Contact Pitting, especially when switching inductive loads like large solenoid valves or motor starters. It is highly recommended to install a flywheel diode or RC snubber across the load to suppress inductive kicks that can degrade the contacts. Finally, always ensure the Terminal Screws are tightened to the specified torque to avoid localized heating, which is a leading cause of premature relay failure in high-current applications.

Product Applications

The Eaton D26MR40A is a standard component in several critical industrial sectors:

• Automotive Manufacturing: Used in the master control logic for assembly lines and metal stamping presses where multi-pole switching is required for safety interlocking.

• Machine Tool Control: Managing the operational sequencing of CNC peripherals, coolant pumps, and tool changers.

• Lifting and Hoisting: Integrating into the control panels of overhead cranes and heavy-duty hoists to manage auxiliary motor functions.

• Power Plant Utilities: Serving as a reliable interface relay in switchgear control circuits for monitoring breaker positions.

• Process Automation: Coordinating the timing and sequencing of valves and actuators in chemical processing plants.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

Please make an inquiry for more models：

EATON MTL5053

EATON T0-4-8441

EATON NZMN1-4-A100

EATON NZMN1-4-A125

EATON DH361FDK2WR

EATON CE15ANS3AB

EATON MTL5531

EATON MTL5082

EATON MTL7787

EATON MTL5541

EATON S801T24N3B

EATON DIL M25-10

EATON DIL M17-10

EATON XTCEXFAC11

EATON XTCEXFCC22

EATON C320KGS3

EATON C316FNA3

EATON PXM1000

EATON Diris A-20

EATON Diris A-30

EATON AN16SN0

EATON XV-440-10TVB-1-10

EATON GHC2030

EATON FD3100L

EATON XTCE009B10T

EATON XTCE015B10T

EATON 35V35A-1A22R

EATON HFD3100L

EATON XTCE065D

EATON PSG480E24RM

EATON DILM65 XTCE065D

EATON HLD3600F

EATON A1L4RPK

EATON E22B1

EATON FD3125L

EATON FD2020L

EATON CE15CNC3C

EATON AN16SN0AB

EATON E22B2

EATON E22TL1

EATON HFD3150L

EATON W201K5CN

EATON 9373-FB2-PS-SS

EATON XTCE009B10A

EATON XTCE065DS1A

EATON XTPR063DC1

EATON 8101-HI-TX

EATON KTK-R-5

EATON KTK-R-1/2

EATON 8937-HN

EATON MTL4549Y

EATON XVS-440-10MPI-1-10

EATON XV-102-B2-35TQR-10

EATON E51SPL

EATON C440A1A045SDD

JUSTWELL PTE. LTD. sells new and discontinued products, and purchases such specialty products through independent channels. JUSTWELL PTE. LTD. is not an authorized distributor, distributor, or representative of the featured products on this website. All product names/images, trademarks, brands, and logos used on this website are the property of their respective owners. Product descriptions, descriptions, or sales with these name images, trademarks, brands, and logos are for identification purposes only and do not imply any association or authorization with any rights holders.

This article is from the official website of JUSTWELL PTE. LTD. If reprinted, please attach this link: https://justwellltd.com .com

JUSTWELL PTE. LTD

Our main products include DCS control system spare parts, PLC system spare parts, and robot system spare parts. Our advantageous brands include Allen Bradley, Bently Nevada, ABB, HIMA, Reliance, Bender, National Instruments, Emerson Ovation, Honeywell, Siemens, Allen Bradley, ICS Triplex, FOXBORO, Schneider, GE Fanuc, Motorola, HIMA, Prosoft, and other imported industrial components. Our main products serve a wide range of electronic, metallurgical, chemical, and power plants Industries such as steel mills, rubber, cement, machinery and equipment, and construction.