# G2 Gateway

> This hardware was discontinued on August 1st 2025

Source: https://docs.denowatts.com/hardware/legacy-deno-hardware/g2-gateway

##### **This hardware was discontinued on August 1st 2025**

## Legacy - G2 Gateway

#### General G2 Information

The Denowatts Gateway is a receiver/coordinator for all Deno sensors. It is both a Modbus server, providing data to 3rd party monitoring applications, as well as a Modbus client, acquiring data directly from local devices. As the hub for the Deno sensors, data is received, processed, and transmitted to cloud servers. ![schematic](https://docs.denowatts.com/media/01M3Y4M5CSYST00MFP913XX1KS-g2dim-219e19d0e15651c0cae56bb5b14daad7.webp)The diagram above shows the front face of the Denowatts G2 Gateway. Note the LCD screen and push-button interface. The back face includes a DIN-rail mounting clip. The required dimensions are also noted. ![G2 ports](https://docs.denowatts.com/media/01M3Y4MBB37P1P4RA0S2HQC52N-g2ports-c766f2e751e2f9b1c8e030b010647517.webp)The second diagram shows the top face of the gateway, where the necessary wires and cables are connected. Note the following connection ports from left to right:

- Threaded Antenna port (RP-SMA)
- USB Type B
- USB Type A
- Ethernet port (cat5, RJ45)
- Serial Comms Port (for Denowatts modbus RS-485 adapter)
- 12-24V barrel jack power input
- Power Status Light

#### This first page details the physical installation of the gateway device.

![G2 Full Enclsoure](https://docs.denowatts.com/media/01M3Y4MJ62K59RNNPMBTQSTQVT-g2enclosuredim-abe7d9b6ec0b2812999da4e9e993afe6.webp)

The gateway must be installed in a weather-proof (NEMA4) enclosure, typically the main DAS cabinet, and requires:

1. 12-24VDC power supply (the gateways draw ~3watts).
2. Internet access (LAN via RJ45 cable).

## Installation Steps

1. **Mount the gateway** on available DIN-rail space.

2. **Connect 12-24VDC power** to the gateway using the barrel-jack connector and the existing power supply within the enclosure.

   - If there is a UPS onsite (uninterruptible power supply), wire up the Denowatts gateway so that it will be backed up by battery power in the event of a grid outage.
   - Verify the green power status light is on (it will illuminate immediately).
   - The LCD screen may take up to 30 seconds to display.
3. **Connect to the network switch** within the enclosure using the provided Ethernet cable.

   - Verify Ethernet status lights are operating (if network is configured).
   - The proper status lights should be: Solid green (link), Blinking Orange (data transmission).
4. **Connect the RS485 Adapter** to the RS485 loop with the site's main production meter (if meter comms are modbus RS-485 and not modbusTCP).

   - Red to (+), Black to (-), White to (G)
5. **Connect Antenna** - see the next page for full instructions.

6. Initial Denos and Check the gateway LCD Screen for Deno sensor communication

   **Sensor Comms Check**

   1. On a G2 gateway, the device's home page will display Deno data. As shown below: ![Upclose g2](https://docs.denowatts.com/media/01M3Y4MFFACNTKSW37XWC3TVVZ-example-g2closeup-23369317d69b3a6ca707ce0004ab6230.webp)

   2. Press the button underneath the **"Deno"** text to scroll through the number of **"nodes"** checking into the current gateway. The count starts at node 0.

      - The screen will display a timestamp, and other metrics that the Deno is reporting in to the gateway.

## Example Images

#### Full DAS Enclosure:

The Denowatts gateway is in the bottom right quadrant of the DAS box.

![G2 Install](https://docs.denowatts.com/media/01M3Y4MHSTE1RDGAVGMYT4ETBZ-example-g2enclosure-2af6b2ae93534517893bcfd701974b3a.webp)

#### Close Up:

Notice how the cables have plenty of space and are not bent sharply.

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**Please contact Denowatts at any point while reading this guide with questions, comments, or concerns:**

- By Phone: 978.309.6688 x1
- Email: [support@denowatts.com](mailto:support@denowatts.com)
- Check out the [**Denowatts Support Center**](https://support.denowatts.com/) for more articles that dive deeper into our methodology and software.