# ENP-RS-CAN-USB M2
The ENP-RS-CAN-USB M2 module features galvanically isolated RS-485, RS-232, and CAN interfaces. It is designed for communication with third-party equipment, including vehicles, inverters, ventilation systems, valves, power meters, and more.
The ENP-RS-CAN-USB M2 module features a wired bus interface based on the Enapter Link protocol, enabling reliable communication with other modules. It also includes wireless Wi-Fi capabilities for secure data transmission and control via the Enapter Gateway and Enapter Cloud. Additionally, the module is equipped with a USB interface for direct connection to the Enapter Gateway.
# Resources
| Datasheet | Quick Start Guide | Certification | Images | |
|---|---|---|---|---|
| ENP-RS-CAN-USB M2 | EN | EN | CE RoHS | Front View Isometric |
Note
The wireless module integrated into this device is certified in accordance with applicable standards. The relevant certificates can be downloaded from the archive.
# Technical Data
| Parameter | Value |
|---|---|
| Power supply | Voltage Range: 9 – 24 VDC |
| Protections: - Reverse polarity protection - Crowbar overvoltage protection (resettable fuse) Power Supply Options: - USB: 5 V / 0.5 A | |
| Power consumption | Full Load: 2.5 W, Peak |
| User serial digital interfaces | RS-232: Baud rate up to 120 kbps RS-485: Baud rate up to 2.5 Mbps CAN: Baud rate up to 1 Mbps USB: 2.0 Full-Speed, Type C |
| Isolation: - RS-232, RS-485 and CAN share a common ground* and galvanically isolated from the power supply and other interfaces - USB is not isolated from the power supply | |
| Internal Bus Terminator😗* CAN and RS-485 include 120 Ω, enabled via DIP switch (default: off). | |
| External Power Output*** | Power output: 5V (±0.2V) / 0.1A |
| Wireless Communication | Wi-Fi 2.4 GHz, IEEE 802.11b/g/n, 20 MHz/40 MHz bandwidth, data rate up to 150 Mbps Bluetooth v5: Bluetooth LE, Bluetooth mesh, data rate up to 2 Mbps Power: Up to +20 dBm |
| Wired Interface | Protocols Supported: Enapter Link Baud Rate: Up to 0.5 Mbps Isolation: Galvanically isolated, individual isolation Internal Bus Terminator😗* 120 Ω, enabled via DIP switch (default: off) |
| Local signaling | 1 LED - Status (Green): - Steady: Correct operation - Blinking: Establishing connection with the server (Enapter Gateway or Cloud) |
| 1 LED – Error (Red): -Indication of module error or internal running logic error, can be programmed by the user (see programming manual) | |
| Mounting | 35 mm Din rail acc. to IEC 60715 |
| Height | 90.2 mm (3.55 inch) |
| Depth | 57.5 mm (2.26 inch) |
| Width | 36.3 mm (1.43 inch) |
| Net weight | 0.090 kg |
* – For differential interfaces such as RS-485 and CAN, the common ground is not involved in data transmission but is used to equalize potentials between different power sources of the transceivers. If the interface is galvanically isolated and has its own independent power source, connecting the common ground may not be necessary.
General recommendation: If the interface terminals provide a connection for the common ground, it should be used to improve the system's stability.
** – The terminator is a resistor used at the ends of a differential data bus, to reduce signal reflections. The module has a built-in terminator, which can be enabled if the device is positioned at the end of the bus. However, in some cases, even if the device is at the end of the bus, enabling the terminator may degrade or disrupt communication. This depends on various factors, such as baud rate, line length, signal rise time, and the characteristics of connected third-party equipment, which cannot be predicted in advance.
General recommendation: Try enabling the terminator if communication is unstable. For short line lengths (less than one meter) and relatively low baud rates (such as 115200), enabling the terminator is likely unnecessary.
*** – The module provides one isolated power output, sharing the isolation from the user serial interfaces. This output can be used to supply third-party equipment if needed.
# Environmental Conditions
| Parameter | Value |
|---|---|
| Ambient air temperature for operation | -40 – +60 °C |
| Ambient air temperature for storage | -40 – +60 °C |
| Relative humidity for operation | 20 – 90 %, without condensation |
| Relative humidity for storage | 20 – 90 %, without condensation |
| Operating altitude | 0 – 2000 m |
| Storage altitude | 0 – 3500 m |
| Pollution degree | 2 |
| IP degree of protection | IP20 |
# Connection
| Parameter | Value |
|---|---|
| Wire cross-section | Power Supply / Enapter Link / User interface connection: Wire Size: 0.14 to 1.5 mm2 / AWG 26 to 16 (use appropriate wire size for the output connected load) Strip Length: 10 mm Temperature resistance: -40 – +105 °C / -40 – +221 °F Push-in connection technology, fast wiring |
| Antenna connection type | SMA-F (module) – SMA-M (antenna), 2.4 GHz |
# Module Overview
# Dimensions
The dimensions are in mm and in brackets in inch.
# Wired Connection Example
Here you can find an example connection, where the module connected to various peripheral devices using RS-232, CAN, and RS-485 interfaces.
The module is connected to the Enapter Link bus alongside other Enapter modules. The Enapter Link bus requires terminators at both ends, which is built into the module and can be enabled via a DIP switch if the module is positioned at the end of the bus. (Note that while separate resistors are shown in the diagram, they should not be used if the internal terminator is enabled.)
# Wireless Connection Example
Here you can find an example of a wireless connection, where the module is connected to the same devices as in the previous example. However, unlike the wired Enapter Link connection, the setup and data exchange occur through a secure Wi-Fi network. For instructions on configuring the wireless connection, please refer to the Quick Start Guide.
# Warnings
WARNING
Alternating current voltage of 110 - 220 V is potentially lethal!
All works on assembly and installation should be performed only with a disconnected power supply!
The installation and assembly of device must be carried out by electrician in accordance with the applicable regulations.
# Safety Instructions
WARNING
This device must be mounted on a DIN rail in an electrical distribution enclosure accordingly with this manual to ensure protection against contact, water and dust.
This device must not be used as part of safety-critical systems.
Edge processing scripting should be used as a convenience feature for basic non-realtime automation and not for life-sustaining or safety-critical use cases. Normal operation depends on working internet, Wi-Fi, and Enapter Cloud. Enapter is not responsible for any harms or losses incurred as a result of any failed automation.
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