The Yamatake-Honeywell MJ-ZHMK5C Control Unit is a robust, multi-board industrial controller from the ELPS-5 series, embodying the engineering legacy of one of Japan's most respected automation companies. Originally developed by Yamatake Corporation (which later rebranded to Azbil Corporation in 2012), this controller carries the Yamatake-Honeywell name from the company's long-standing technical partnership with Honeywell International for distributed control systems and process automation solutions. For facilities running legacy Yamatake-Honeywell or early Azbil control systems, the MJ-ZHMK5C remains an essential spare part and upgrade component.

This MJ-ZHMK5C control unit offers a cost-effective solution for maintaining and extending the operational life of ELPS-5 based automation systems. New or factory-refurbished ELPS-5 controllers  when available  typically command prices of $18,000–$30,000+ with extended lead times from Japan. This used unit, featuring Revision A firmware (FW Rev. 3), 8GB Gbdisk RS2 storage, and DC5V low-power operation, provides verified functionality at approximately 45–55% savings compared to new procurement.

The MJ-ZHMK5C's multi-board architecture incorporates the main processor board, dedicated I/O boards, and specialized function modules  specifically the JS-HMSD51-0, 80364406-401, and 603437002 boards identified in the unit's configuration. This modular design allows for field-repair at the board level, reducing downtime and maintenance costs compared to monolithic controller designs where a single fault requires complete unit replacement. The DC5V power requirement reflects the low-power CMOS design philosophy that Yamatake pioneered, reducing heat generation and improving long-term reliability in continuous-duty industrial environments.

Product Overview: Yamatake-Honeywell MJ-ZHMK5C ELPS-5 Control Unit

The ELPS-5 series represents a generation of Yamatake-Honeywell programmable controllers designed for building automation, industrial process control, and equipment monitoring applications. The "ELPS" designation refers to Yamatake's Extended Logic Processing System  a controller architecture that bridges the gap between simple programmable logic controllers (PLCs) and full distributed control systems (DCS), offering embedded computing capability with real-time I/O processing in a compact, DIN-rail or panel-mountable form factor.

The MJ-ZHMK5C is a specific variant within the ELPS-5 family, distinguished by its multi-board configuration and enhanced storage capability. The 8GB Gbdisk RS2 solid-state storage provides non-volatile program and data retention without the mechanical wear susceptibility of hard disk drives. This is particularly important in industrial environments where vibration, temperature cycling, and electromagnetic interference can cause conventional storage media to fail prematurely. The Gbdisk RS2 is an industrial-grade storage module designed for extended temperature operation and high write-cycle endurance.

What makes the Yamatake-Honeywell/Azbil controller line significant in the industrial automation landscape is the company's heritage in precise control algorithms  particularly for HVAC, combustion control, and temperature regulation applications. Yamatake (founded 1906 as Yamatake Shokai) developed Japan's first electronic temperature controller in 1952 and has been at the forefront of process control innovation for over a century. The technical knowledge embedded in ELPS-5 controller firmware reflects decades of refinement in PID control, cascade control, and adaptive tuning algorithms that newer, less-experienced controller manufacturers struggle to replicate.

Technical Specifications

Key Features & Benefits

• Multi-Board Modular Architecture: The MJ-ZHMK5C uses a multi-board design with separate JS-HMSD51-0, 80364406-401, and 603437002 function boards. This modularity enables field-level repair and board replacement, minimizing downtime and eliminating the need for complete unit replacement when a single function fails.
• DC5V Low-Power Operation: The 5-volt DC power requirement reflects a low-power CMOS design that generates minimal heat, reducing thermal stress on electronic components and extending operational lifespan. Low power also simplifies backup power design using standard UPS or battery systems.
• 8GB Gbdisk RS2 Industrial Storage: Non-volatile solid-state storage provides reliable program retention and data logging capability without mechanical hard disk wear. The Gbdisk RS2 is rated for industrial temperature ranges and high write-cycle endurance, suitable for 24/7 continuous operation.
• ELPS-5 Proven Architecture: The Extended Logic Processing System has been deployed in thousands of building automation and industrial control applications worldwide since the late 1990s. Its mature firmware (FW Rev. 3 on this unit) represents decades of operational refinement and bug-fixing.
• Yamatake-Honeywell/Azbil Heritage: Yamatake Corporation (now Azbil) has been a leader in process control instrumentation since 1906. The company's controllers are renowned for precise PID algorithms, reliable operation in harsh environments, and long product support lifecycles.
• FW Rev. 3 Firmware: This unit ships with Firmware Revision 3, which includes the latest feature updates, communication protocol support, and diagnostic enhancements available for the ELPS-5 hardware platform.
• 45–55% Savings vs. New: This used MJ-ZHMK5C offers substantial savings compared to new ELPS-5 controllers that typically range from $18,000–$30,000+ when available from factory or authorized distributors.
• Compact Panel-Mount Design: The ELPS-5 form factor is designed for standard industrial panel mounting, minimizing installation footprint and simplifying retrofit into existing control cabinets.

Industrial Applications

The Yamatake-Honeywell MJ-ZHMK5C ELPS-5 control unit serves critical automation functions across industries where reliable, long-term stable control is essential. Based on our extensive experience with Yamatake/Azbil control systems, here are the primary deployment sectors:

Building Automation Systems (BAS)

The ELPS-5 series was widely deployed in large commercial building automation for HVAC control, chiller sequencing, air handling unit (AHU) coordination, and energy management. The MJ-ZHMK5C's multi-board architecture handles the complex interlock logic required for modern variable air volume (VAV) systems and central plant optimization. The DC5V low-power design contributes to overall building energy efficiency goals.

Industrial Process Control

Manufacturing facilities use ELPS-5 controllers for batch process sequencing, temperature control loops, pressure regulation, and flow ratio control. The controller's precise PID algorithms  refined over decades of Yamatake process control experience  deliver tighter control than many contemporary PLC offerings, particularly for slow-process applications like heat treatment furnaces and chemical reactor temperature control.

Combustion Control & Burner Management

Yamatake has deep expertise in combustion control dating to the 1950s. The MJ-ZHMK5C implements combustion safeguard logic, fuel-air ratio control, and flame safety interlocks for industrial boilers, furnaces, and incinerators. The 8GB storage provides ample capacity for event logging and combustion efficiency trend analysis.

Marine Engine Room & Auxiliary Systems

Shipboard applications include diesel generator control, bilge and ballast system automation, cargo tank monitoring, and engine room ventilation control. The DC5V power requirement simplifies marine electrical system integration, and the multi-board design allows underway repair  critical when vessel downtime costs thousands of dollars per hour.

Water & Wastewater Treatment

Pump station control, chemical dosing systems, clarifier rake drives, and ultraviolet disinfection systems all utilize the ELPS-5 controller's sequencing and analog control capabilities. The Gbdisk RS2 storage maintains operation logs and alarm histories for regulatory compliance reporting.

Power Generation Auxiliary Control

Auxiliary systems in power plants  including cooling water systems, fuel handling equipment, and air compressor control  employ ELPS-5 controllers for reliable, deterministic control. The controller's long operational history provides confidence for critical applications where controller failure would trigger plant trip conditions.

Food & Beverage Process Automation

Pasteurization temperature control, clean-in-place (CIP) cycle sequencing, batch recipe management, and packaging line coordination all benefit from the ELPS-5's combination of discrete logic and analog loop control in a single platform. The controller's compact size fits into the limited panel space typical of food processing facilities.

Why Buy From Auto2mation?

Auto2mation has specialized in sourcing and supplying legacy and hard-to-find industrial automation equipment since 2002. When you purchase this Yamatake-Honeywell MJ-ZHMK5C from us, you benefit from:

• 30-Day Functional Warranty: Every used control unit undergoes power-on testing, storage verification, and connector inspection before shipment. If the unit does not operate as specified within 30 days of delivery, we provide replacement or full refund.
• Free Worldwide Shipping: We ship to over 120 countries via DHL, FedEx, and international freight. Industrial controllers are packaged in anti-static bags with moisture barrier protection, shock-absorbing foam, and custom-fit wooden crates.
• Detailed Product Documentation: We provide board-level photographs showing the JS-HMSD51-0, 80364406-401, and 603437002 boards, connector pin conditions, and any cosmetic wear  full transparency before you purchase.
• Legacy System Expertise: Our engineering team understands Yamatake-Honeywell and Azbil control system architectures. We can advise on compatibility with your existing ELPS-5 network, programming software requirements, and spare board procurement.
• 45%+ Cost Savings: This used MJ-ZHMK5C delivers verified functionality at substantially less than new or factory-refurbished pricing, making it the economical choice for legacy system maintenance budgets.
• Proven Industrial Equipment Supplier: Auto2mation maintains a 4.8+ star customer rating and has completed thousands of industrial automation equipment transactions with clients across marine, power generation, manufacturing, and process industries.

How to Order & Installation Guide

Procuring and installing your Yamatake-Honeywell MJ-ZHMK5C control unit is straightforward with Auto2mation:

Step 1: Place Your Order

Click "Add to Cart" and complete checkout. We accept wire transfer, major credit cards, and PayPal. Corporate purchase orders are welcome from established accounts  contact sales@aeliyamarinetech.com for terms.

Step 2: Pre-Shipment Testing

Our technicians perform power-on verification, storage read/write testing, and visual inspection of all connector pins and board-mounted components. We photograph the unit during testing and email you the report with tracking details within 24 hours of shipment.

Step 3: Unpack & Inspect

The controller arrives in anti-static packaging within a shock-protected crate. Visually inspect all boards, connectors, and the enclosure for transit damage before applying power. Handle all boards by their edges to prevent ESD damage.

Step 4: Mounting

Install the MJ-ZHMK5C in a standard industrial control panel using the provided mounting brackets. Maintain adequate clearance for ventilation around the unit. The DC5V design generates minimal heat, but ambient temperatures should remain within the manufacturer's specified range.

Step 5: Power Connection

Connect a regulated DC5V power supply to the unit's power input terminals. Ensure the power supply can deliver sufficient current for the multi-board configuration. Verify correct polarity before applying power  reverse polarity will damage the controller electronics. A regulated switching power supply with overvoltage protection is recommended.

Step 6: Communication & I/O Setup

Connect the communication cable (RS-485, Ethernet, or proprietary Yamatake bus  depending on your system configuration) to establish communication with the ELPS-5 programming software or host SCADA system. Configure I/O addressing to match your existing system configuration or upload the program from your engineering workstation.

Step 7: Commissioning & Testing

Download the control program to the controller and verify all I/O points respond correctly. Run the system through its operational sequences in manual mode before enabling automatic operation. Document all configuration parameters and backup the program to external storage.

Related Products You May Also Need

• Yamatake/Azbil ELPS-5 I/O Modules – Expansion I/O boards for the ELPS-5 system including analog input, digital output, and communication modules
• Yamatake DC5V Power Supplies – Regulated 5V DC industrial power supplies for ELPS-5 controller power requirements
• Yamatake-Honeywell Communication Interface Boards – RS-485, Ethernet, and proprietary bus interface modules for ELPS-5 networking
• Industrial Control Panel Components – DIN rail, terminal blocks, cable management, and enclosure accessories

External Technical Resources

• Azbil Corporation Official Website – Successor to Yamatake Corporation, provides product information, technical documentation, and support resources for legacy Yamatake-Honeywell control systems
• Honeywell Process Solutions – Information on Honeywell's current distributed control systems and migration paths from legacy Yamatake-Honeywell platforms
• Nidec Japan Servo Corporation – Manufacturer of industrial drive and servo components, relevant for integrated motor control applications with ELPS-5 systems
• International Society of Automation (ISA) – Industry standards for industrial control system design, programming, and cybersecurity
• International Electrotechnical Commission (IEC) – International standards for programmable controller functionality, communication protocols, and safety systems

Frequently Asked Questions (FAQ)