IN780SAM0XSO000 – Cascade controller for Samsung EHS and DVM Hydro systems, Modbus TCP integration, PV support

IN780SAM0XSO000 – Intesis cascade controller for Samsung EHS and DVM Hydro systems, up to 8 units, Modbus TCP integration, PV support, rotation, and DHW priority.

The IN780SAM0XSO000 is an industrial Intesis cascade controller designed for centralized management of up to eight Samsung EHS air-to-water heat pumps or DVM Hydro HE/HT units. It optimizes system operation for heating, cooling, and domestic hot water (DHW), ensuring coordinated and efficient performance of multiple units in commercial or industrial installations.

The controller continuously analyzes temperature readings from buffer tanks and DHW storage sensors to determine the optimal number of active units. With built-in rotation and sequencing algorithms, it ensures uniform unit usage and energy-efficient operation across the installation. These intelligent control functions extend system lifetime and improve overall energy performance by distributing operating hours evenly among connected units.

The IN780SAM0XSO000 supports heating, cooling, and DHW modes. In heating mode, the device can regulate operation based on an outdoor temperature compensation curve to maintain indoor comfort while reducing energy consumption. The DHW priority function temporarily pauses the heating circuits when hot water demand occurs, automatically controlling a 3-way valve to switch between tank and buffer operation. An auxiliary electric heater can also be activated to provide additional capacity during peak loads.

Equipped with an integrated Modbus TCP interface, the controller can communicate with any BMS platform for real-time monitoring and control. System integrators can read operating status, temperatures, error codes, and energy data, or adjust operating modes and setpoints remotely. Four analog inputs are available for temperature sensors (buffer, DHW, ambient), along with one relay output for 3-way valve control. Through Modbus TCP, the controller can also connect to photovoltaic (PV) systems, using surplus solar power for DHW or buffer tank heating.

A sequential start-up function prevents electrical overloads by ensuring soft activation of multiple units. Each control loop (heating, cooling, DHW) includes an independent PI controller with configurable proportional and integral parameters. In the event of a unit failure, the system automatically redistributes operation among the remaining units to maintain system continuity. Configuration and diagnostics are available via Intesis MAPS through Ethernet or USB-C connection.

Main features:

• Control of up to 8 Samsung EHS or DVM Hydro HE/HT units.
• Operation in heating, cooling, and DHW modes with automatic DHW priority.
• Configurable heating curve based on outdoor temperature.
• Modbus TCP integration with BMS systems and PV energy management.
• Rotation and sequential start-up of units for extended lifespan.
• Support for electric heater as auxiliary heat source.
• 4 analog PT/NTC inputs, 1 relay output for 3-way valve control.
• Galvanic isolation 1000 VDC between communication ports.
• DIN rail mounting, IP20 enclosure, compact 90 × 106 × 58 mm design.
• BTL certification and full compliance with CE, RoHS standards.

Technical specifications:

• Compatibility: up to 8 Samsung EHS or Hydro HE/HT heat pump units.
• Communication interface: Modbus TCP (Ethernet RJ45, 10/100 Mbps).
• Analog inputs: 4 × PT1000/NTC sensors (buffer, DHW, outdoor temperature).
• Relay output: 1 × 3-way valve (NO/C/NC, external protection required).
• Power supply: 12–36 VDC (250 mA) or 24 VAC; recommended 24 VDC.
• Isolation: 1000 VDC between communication ports.
• Connectors: AC-Port B (R1/R2) for Samsung network, Ethernet, USB-C, Power.
• LED indicators: PWR, ERR, Ethernet Link/Speed, TX/RX.
• Enclosure: PC UL94 V-0, color RAL 7035, IP20 protection rating.
• Operating temperature: –10…+70 °C; humidity 5–95% RH (non-condensing).
• Dimensions / weight: 90 × 106 × 58 mm / 240 g.
• Mounting: DIN rail EN60715 TH35.

Warranty and certifications:

• BTL (BACnet Testing Laboratories)
• CE, RoHS compliant
• Manufacturer warranty: 3 years

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Example of integration