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MMC Electrical System

Smarter Control Through Intelligent Design

Paramedic seated in the patient module adjusting the Demers ambulance multiplex control touchscreen, with a cardiac monitor and organized cabinetry visible in the background

The Multiplex Modular Connected (MMC) electrical system is an advanced control platform designed to simplify interaction with your ambulance’s electrical functions. By replacing complex wiring with intelligent digital control, the MMC electrical system helps you manage critical systems more efficiently, reduce distractions, and stay focused on patient care.

Developed with input from EMS professionals, the MMC electrical system reflects how you work in high-pressure environments. It centralizes control, improves system awareness, and supports faster, more confident decision-making inside the patient compartment.

The MMC electrical system is standard on all our ambulances. It reflects our belief that intelligent electrical control should be foundational, not optional, reinforcing our commitment to intentional design, thought leadership, and innovation engineered around the EMS professionals who rely on their ambulance systems every day.

The MMC electrical system was intentionally designed to simplify both interaction and architecture. By centralizing control and reducing wiring complexity, it provides clear system visibility and helps you manage critical functions without unnecessary distraction.

The MMC electrical system was intentionally designed to simplify both interaction and architecture. By centralizing control and reducing wiring complexity, it provides clear system visibility and helps you manage critical functions without unnecessary distraction.

How It Benefits You
  • Centralized, intuitive control of vehicle and module functions
  • Reduced cognitive load from simplified switch logic and system feedback
  • Faster identification of system status or faults
  • Improved reliability through continuous monitoring and fault isolation
  • Greater durability from reduced wiring complexity
Close-up of a Demers ambulance electrical control module with labeled ECU unit, organized wiring harnesses, and mounted ignition components inside an aluminum compartment

Intelligent Features That Support Real-World EMS Operations

The MMC electrical system combines intelligent control with practical features designed to support safety, reliability, and ease of use in the field. Each feature is purpose-built to reduce distractions, protect critical systems, and simplify operation during every shift.

Key MMC Electrical System Features Include:
Demers ambulance cab center console featuring a touchscreen control panel, emergency light switches, climate controls, radio microphone, and integrated armrests between the front seats
Demers ambulance interior control panel with touchscreen AUX system display, volume knob, and overhead switches mounted above medical gas outlets and safety signage
Close-up of a Demers ambulance touchscreen control panel displaying lighting, HVAC, and auxiliary system controls mounted beside the rear door inside the patient module
Hand holding a smartphone displaying Demers ambulance electrical system controls, with a blue attendant seat and interior control panel visible in the background
Demers ambulance dashboard control panel featuring dual air vents, climate controls, rocker switches, and a central touchscreen display for interior lighting and system functions

Reduces the intensity of emergency flash lights when the ambulance is in park, helping alert road users while minimizing glare and improving scene safety.

Actively manages electrical loads to help prevent complete battery drain, protecting critical systems and supporting reliable starts.

Designed to support automatic vehicle location and data integration, helping fleets connect vehicle systems with operational tools.

Enables faster system checks and troubleshooting, reducing downtime and simplifying service when issues arise.

Touchscreen panels are installed in both the front cab and care module, giving drivers and attending crews equal access to system controls.

Allows system improvements and updates without hardware changes, helping the system remain current over time.

Automatically adjusts screen brightness to improve visibility and reduce glare in changing light conditions.

Understanding Our Ambulance Electrical System

These frequently asked questions provide clear, practical answers about the MMC electrical system, including how it works, what makes it different from traditional wiring architectures, and how it supports reliability, serviceability, and long-term performance in real EMS environments.

Yes. The MMC electrical system is standard on all our ambulance models. It reflects our belief that intelligent electrical control should be foundational, not optional, and reinforces our commitment to intentional design and innovation that supports real-world EMS operations.

The MMC electrical system is built on proven multiplex technology powered by PRAN Systems. This next-generation system builds on PRAN multiplexing platforms deployed across thousands of Demers ambulances in long-term, real-world service.

By building on a trusted, field-proven foundation, the MMC electrical system delivers modern capabilities while maintaining reliability, service continuity, and long-term support. This approach helps maximize ambulance availability, simplify maintenance, and reduce lifecycle costs for EMS agencies.

The MMC electrical system uses highly responsive touchscreen controls with visual and audio feedback, allowing you to quickly confirm selections without distraction. The interface features an ergonomic layout and intuitive navigation, making it easy to access and manage ambulance functions during transport.

Touchscreen panels are installed in both the front cab and the care module, using 4.3-inch displays, providing convenient access to controls wherever you are working. The system is designed to be responsive and usable in real-world EMS conditions, including use while wearing gloves, so you can maintain control without slowing your workflow or compromising patient care.

The MMC electrical system offers one of the most comprehensive AVL/CAN interfaces available, enabling EMS agencies to access and leverage critical vehicle and system data in real time.

Key capabilities include:

  • AVL/CAN interface with access to over 100 signals, including data from the chassis, care module, medical equipment, and driver behavior.
  • Seamless integration with evolving chassis-embedded technologies, helping future-proof the system as vehicle platforms advance.
  • Support for data-driven decision-making, allowing agencies to use real-time information to improve dispatch, operations, and patient care.
  • Telematics readiness for electric vehicle deployment, where factors such as state of charge will play an increasingly important role in dispatch decisions.

The MMC electrical system is designed to be brand-neutral, allowing compatibility with a wide range of AVL solution providers. This flexibility enables you to choose the telematics partners and platforms that best meet your needs.

By serving as an intelligent data enabler, the MMC electrical system unlocks actionable insights that drive efficiency gains, support smarter dispatch decisions, and enhance patient care when seconds matter.

The MMC electrical system includes multiple features designed to protect battery health and support reliable ambulance operation:

  • Low-power sleep mode reduces electrical draw during unplugged storage, helping keep the ambulance ready for deployment after extended downtime.
  • Shoreline indicator provides at-a-glance visibility into battery charging status so you can quickly confirm readiness before a call.
  • Battery isolator with solid-state relay (SSR) protects the chassis battery by preventing drain from the care module, ensuring reliable engine starts even if the module battery is depleted.

Together, these components help maximize ambulance availability, reduce unexpected battery issues, and support dependable daily operation.

The MMC electrical system features intelligent emergency lighting patterns that enhance scene safety without causing unnecessary glare or visual fatigue. The Smooth Pattern feature gently reduces the intensity of flashing emergency lights when the ambulance is in park, helping alert road users while minimizing harsh light that could impair vision. This allows you to work more comfortably on scene while maintaining clear visibility for passing traffic.

In addition, Day/Night Mode automatically adjusts emergency light brightness based on surrounding lighting conditions. Whether operating in broad daylight, at night, or transitioning through environments such as tunnels, the system adapts in real time to maintain visibility without excessive glare. Together, these features help reduce eye fatigue, improve situational awareness, and enhance overall road safety for you and the public.

Wireless diagnostics provide fast, real-time access to electrical system information, helping to identify and address issues more quickly. Using only a mobile phone and a free app, your crew and service teams can instantly access in-depth diagnostic data without specialized tools.

This immediate visibility enables on-the-spot assessment of problems and supports faster troubleshooting. When additional support is needed, the same system provides direct access to our Customer Care team, where knowledgeable technicians can assist in real time. Together, these capabilities help minimize service time, reduce delays, and get your ambulance back in service faster.

The MMC electrical system is designed with simplified, service-friendly architecture and is supported through our authorized dealer network. Access to OEM parts and knowledgeable technical support helps ensure reliable performance, efficient service, and long-term system support throughout the ambulance’s service life.

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