4-Channel DC Switch / SMARTSWITCH-DC4

The SmartSwitch from Energy Solutions (MPN: SMARTSWITCH-DC4) is a configurable DC switching and control module for integrating DC loads into Victron GX systems. Four channels enable centralized control and monitoring of loads such as lighting, fans, pumps, or other DC devices. The module is integrated into the Victron system environment via the CAN interface, allowing the connected circuits to be managed together with the rest of the system components. It supports operation in 12- or 24-V systems and features current monitoring, configurable overcurrent protection, and thermal protection functions. Depending on the configuration, channels can not only switch loads but also receive digital signals from switches, push buttons, and simple contacts. The SmartSwitch is specifically designed for integration into Victron-based installations using Cerbo GX or the GX environment.

Digital DC load control directly within the Victron system

• Four configurable channels for integrating DC circuits
• Designed for 12-V and 24-V DC systems
• Direct integration into Victron GX / Cerbo GX via VE.Can
• Output operating modes: Latching, Momentary, and Dimming
• Current monitoring for individual circuits
• Configurable overcurrent protection and thermal protection
• Additional operation and status display directly on the module
• Two RJ45 connectors allow for integration or extension of the CAN connection
• Compact design weighing only approx. 170 g, including connectors
• Suitable for Victron-based applications in marine, RV, automotive, and off-grid systems
• According to the manufacturer’s current website, multiple modules can be combined for larger installations

Four channels for various control tasks

The SmartSwitch DC4 integrates the control of individual DC circuits into the central Victron system environment. Instead of operating loads exclusively via separate mechanical switches and additional relay configurations, the circuits can be integrated, labeled, and organized through the switching module. Three basic operating modes are available for output channels:

Latching: The output is turned on or off and maintains its respective switching state.
Momentary: The output is active only as long as the corresponding button is pressed. This operating mode is therefore suitable for functions that require push-button operation.
Dimming: PWM control is used for compatible lamps or lighting. The datasheet specifies a pulse width modulation frequency of 120 Hz for this purpose.

Integration into Victron GX via VE.Can

The primary purpose of the SmartSwitch DC4 is integration into Victron-based systems. The CAN interface features two RJ45 ports and thus supports CAN daisy-chaining. The connected circuits can then be managed via the GX interface. In the device menu of the GX system, you can configure, among other things, the module name, channel label, group assignment, operating mode, and fuse rating. Setup requires firmware version v3.60 or higher on the Victron GX device.

Compatibility and Applications

The SmartSwitch DC4 is specifically designed for Victron GX-based installations. Energy Solutions specifically mentions Cerbo GX as a system component for integration. Other applications include marine, RV/camper, automotive, and off-grid systems. Typical switchable loads include, for example:

• DC lighting
• Fans and blowers
• Water pumps
• Refrigerators
• Other suitable DC auxiliary loads

The module is designed for DC distribution and load control in watercraft and road vehicles; however, it should not be used in road vehicles while the vehicle is in motion. Furthermore, the SmartSwitch is expressly not intended for safety-critical applications.

Connection and Installation

Installation is performed using two mounting holes with a diameter of 4.3 mm. M4 screws or No. 6 self-tapping screws can be used for this purpose. The dimensional drawing on page 3 of the data sheet shows a maximum housing width of approximately 118 mm and a housing height of 75 mm, plus the connection areas. Two RJ45 connectors are available for communication. The four channels are connected via a pluggable terminal block, while a separate pluggable connector is provided for the DC power supply.

Conductor Cross-Sections at a Glance

• Output wire cross-section, solid: 0.2–2.5 mm²
• Output conductor cross-section, flexible: 0.2–2.5 mm²
• Output wire cross-section with ferrule: 0.25–2.5 mm²
• Power supply conductor cross-section, solid: 0.2–6 mm²
• Supply wire cross-section, flexible: 0.2–4 mm²
• Conductor cross-section (power supply with ferrule): 0.25–4 mm²

Technical Specifications

• Number of channels: 4
• System: 12/24 V DC
• Operating voltage for DC loads: 8–32 V DC
• Supply voltage (control/CAN only): 6–32 V DC
• Maximum supply voltage according to maximum ratings: 33 V
• Quiescent current at 12 V: typically 50 mA, max. 70 mA
• Maximum supply current: 15 A in the normal operating range
• PWM frequency: 120 Hz
• Configurable fuse ratings: 2 A / 3 A / 4 A / 5 A
• Communication: CAN
• CAN connectors: 2 × RJ45
• VE.Can: compatible pinout
• CAN functions according to the datasheet: J1939/NMEA2000 Address Claim, supported Tx/Rx PGNs
• Output connector: pluggable terminal block, 5.08 mm pitch
• DC power connection: pluggable terminal block, 7.62 mm pitch
• Ambient temperature: -20 to +60 °C
• Operating temperature for specified operating parameters: -10 to +50 °C
• Storage temperature: -40 to +85 °C
• Relative humidity: 0–95%, non-condensing
• Weight: approx. 170 g including connectors
• Dimensions according to the data sheet: 115 × 40 × 105 mm with connectors; 115 × 40 × 75 mm without connectors
• Flammability of PCB/Housing: UL94V-0
• Standards: EN 61000-6-1:2019, EN 6000-6-3 A1, and EN 60945:2002

Package Contents

1x Energy Solutions SmartSwitch DC4
Plug-in terminals for outputs and DC power supply