# Data Sheet

## Modbus Ethernet Wi-Fi® Gateways (G11 - G13)

<table border="1" id="bkmrk-features-2-mode-ethe" style="width: 105.357%;"><tbody><tr><td style="width: 49.3121%;">[![g11.jpg](https://doc.redisage.com/uploads/images/gallery/2025-03/scaled-1680-/g11.jpg)](https://doc.redisage.com/uploads/images/gallery/2025-03/g11.jpg)</td><td style="width: 50.6903%;">**Features**

- 2-mode Ethernet/Wi-Fi Modbus Gateway
- Ethernet/Wi-Fi converter to RS232/RS485
- ESD protection for the RS485 data line
- Power supply: +12 to +30 VDC
- Transmission speed up to 115200 bps
- Tx, Rx and power LED indicators
- RS485 embedded termination 120 ohm
- Operating temperatures: -40°C to +75°C
- DIN rail mounting
- Dimensions: 90x56.4x22.5 mm
- 3 years warranty
- Customization of OEM is welcomed

</td></tr></tbody></table>

### Introduction

Devices are based on G11 - G13 gateways (**ESP32 Xtensa LX6 microcontroller**) depending on needed ports and interfaces.

Dedicated EMC integrated circuits guarantee improved connection quality by limiting the impact of interference typical for an industrial environment.

Modbus gateways allow data transmission between LAN hosts, Wi-Fi hosts, and serial devices by converting Modbus protocols (Modbus TCP and Modbus RTU/ASCII). They are intended to be used in industrial networks especially in the field of Industry 4.0 but not only. Apart from extending the capabilities of industrial devices, they can be also adapted up to user’s requirements and needs.

Transmission is carried out by two modes: Gateway and Router. In the Gateway mode, the port is used to communicate with Slave devices, but in the Router mode with Master devices. It is also possible to set up different modes on every port. Block diagrams below describe how each of these modes works.

<div drawio-diagram="1359"><img src="https://doc.redisage.com/uploads/images/drawio/2025-07/drawing-29-1753771839.png" alt=""/></div>

<p class="callout warning">The device has max 20 sockets open in Gateway mode and max 8 in Router mode. It is possible to increase this value at client's request.</p>

### Specification  


<table border="1" id="bkmrk-redisage-pn-g01-g02-" style="width: 100.595%;"><colgroup><col style="width: 15.9714%;"></col><col style="width: 16.4482%;"></col><col style="width: 22.2884%;"></col><col style="width: 22.2884%;"></col><col style="width: 22.4076%;"></col><col style="width: 0.11919%;"></col><col style="width: 0.11919%;"></col><col style="width: 0.11919%;"></col></colgroup><thead><tr><td aria-sort="Brak" class="ak-renderer-tableHeader-sortable-column__wrapper align-center" colspan="2" data-colwidth="220,148">**Redisage PN**

</td><td aria-sort="Brak" class="ak-renderer-tableHeader-sortable-column__wrapper align-center" data-colwidth="101">**G11**

</td><td aria-sort="Brak" class="ak-renderer-tableHeader-sortable-column__wrapper align-center" data-colwidth="96">**G12**

</td><td aria-sort="Brak" class="ak-renderer-tableHeader-sortable-column__wrapper align-center" colspan="4" data-colwidth="100">**G13**

  
</td></tr></thead><tbody><tr><td data-colwidth="220" rowspan="3">Ports

</td><td data-colwidth="148">RS232

</td><td class="align-center" data-colwidth="101">2x

</td><td class="align-center" data-colwidth="96">-

</td><td class="align-center" colspan="4" data-colwidth="100">-

</td></tr><tr><td data-colwidth="148">RS485

</td><td class="align-center" data-colwidth="101">-

</td><td class="align-center" data-colwidth="96">1x

</td><td class="align-center" colspan="4" data-colwidth="100">-

</td></tr><tr><td data-colwidth="148">RS232/RS485

</td><td class="align-center" data-colwidth="101">-

</td><td class="align-center" data-colwidth="96">-

</td><td class="align-center" colspan="4" data-colwidth="100">2x

</td></tr><tr><td colspan="2" data-colwidth="220,148">Microcontroller

</td><td class="align-center" colspan="6" data-colwidth="101,96,100">ESP32

</td></tr><tr><td colspan="2" data-colwidth="220,148">WiFi

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">2.4 GHz b/g/n

</td></tr><tr><td data-colwidth="220" rowspan="2">Power

</td><td data-colwidth="148">Voltage

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">12-30 VDC

</td></tr><tr><td data-colwidth="148">Power

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">&lt; 1 W

</td></tr><tr><td colspan="2" data-colwidth="220,148">Frame ground connection

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">yes

</td></tr><tr><td colspan="2" data-colwidth="220,148">Baud rate

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">up to 115200 bps

</td></tr><tr><td colspan="2" data-colwidth="220,148">LED indicators

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">communication Tx, Rx and power

</td></tr><tr><td colspan="2" data-colwidth="220,148">RS485 termination

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">120 ohm manually enabled

</td></tr><tr><td data-colwidth="220" rowspan="3">Connector

</td><td data-colwidth="148">RS232/RS485

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">8-pin terminal block max. 2.5 mm<sup data-renderer-mark="true">2</sup> wire

</td></tr><tr><td data-colwidth="148">Power

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">3-pin terminal block max. 2.5 mm<sup data-renderer-mark="true">2</sup> wire

</td></tr><tr><td data-colwidth="148">Ethernet

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">RJ45

</td></tr><tr><td data-colwidth="220" rowspan="2">Transmission  
distance

</td><td data-colwidth="148">RS485

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">max. 1,200 m at 9.6 kbps; max. 400 m at 115.2 kbps  
(Belden 9841 2P twisted-pair cable, if different cables are used,  
the transmission distance may change)

</td></tr><tr><td>RS232

</td><td colspan="6">max. 15 m at 115.2 kbps

</td></tr><tr><td colspan="2" data-colwidth="220,148">Mounting and enclosure

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">DIN rail, plastic PA - UL 94 V0, black/green

</td></tr><tr><td colspan="2" data-colwidth="220,148">Temperatures

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">-40°C to +75°C operating and storage

</td></tr><tr><td colspan="2" data-colwidth="220,148">Humidity

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">10 - 90% RH, non-condensing

</td></tr><tr><td colspan="2" data-colwidth="220,148">ESD protection

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">±4 kV contact discharge / ±8 kV air discharge

</td></tr><tr><td colspan="2" data-colwidth="220,148">Certification

</td><td class="align-center" colspan="6" data-colwidth="101,96,100,100,102,93">CE, RoHS, RED

</td></tr><tr><td colspan="2">Norms

</td><td colspan="6">61000-6-2 - Immunity standard for industrial environments

61000-6-4 - Emission standard for industrial environments

EN 300 328 – Data transmission equipment operating in the 2,4 GHz  
band

</td></tr></tbody></table>


### Variants  


#### G11 - Ethernet + Wi-Fi Modbus Gateway 2 x RS232

<div drawio-diagram="1485"><img src="https://doc.redisage.com/uploads/images/drawio/2025-09/drawing-29-1758189796.png" alt=""/></div>

#### G12 - Ethernet + Wi-Fi Modbus Gateway 1 x RS485

<div drawio-diagram="1477"><img src="https://doc.redisage.com/uploads/images/drawio/2025-09/drawing-29-1758095682.png" alt=""/></div>

#### G13 - Ethernet Modbus Gateway 2 x RS232/RS485

<div drawio-diagram="1491"><img src="https://doc.redisage.com/uploads/images/drawio/2025-09/drawing-29-1758190562.png" alt=""/></div>

<p class="callout danger">In the G13 gateway user should use only RS232 or only RS485 interface of one port as they occupy the same internal bus of the device. It means, don't use pairs: RS232-1 &amp; RS485-1 at the same time and RS232-2 &amp; RS485-2 at the same time!</p>

### Frame ground FG  


Electronic circuits are constantly prone to electrostatic discharge ESD. Redisage Electronics modules feature a design for the frame ground terminal block FG. The frame ground provides a path for bypassing ESD, which provides enhanced static protection ESD abilities and ensures the module is more reliable. Connecting FG terminal block to the earth ground will bypass the ESD disturbances outside the device so will provide a better level of protection against ESD.

Frame Ground FG connection reference drawing is provided below.

<div drawio-diagram="177"><img src="https://doc.redisage.com/uploads/images/drawio/2024-03/drawing-10-1711619289.png" alt=""/></div>

If earth ground is not available FG can be left floating or it can be connected with the power supply GND.

### Pin assignments

<table border="1" id="bkmrk-g11-g12-g13%C2%A0" style="border-collapse: collapse; width: 100%;"><colgroup><col style="width: 33.3333%;"></col><col style="width: 33.3333%;"></col><col style="width: 33.3333%;"></col></colgroup><tbody><tr><td class="align-center">**G11**

**[![image.png](https://doc.redisage.com/uploads/images/gallery/2025-07/scaled-1680-/Vdnimage.png)](https://doc.redisage.com/uploads/images/gallery/2025-07/Vdnimage.png)**

</td><td class="align-center">**G12**

[![image.png](https://doc.redisage.com/uploads/images/gallery/2025-07/scaled-1680-/Xw2image.png)](https://doc.redisage.com/uploads/images/gallery/2025-07/Xw2image.png)

</td><td class="align-center">**G13**

[![image.png](https://doc.redisage.com/uploads/images/gallery/2025-07/scaled-1680-/SN9image.png)](https://doc.redisage.com/uploads/images/gallery/2025-07/SN9image.png)

</td></tr></tbody></table>

### LED indicators  


<table border="1" id="bkmrk-modbus-gateways-g01-"><colgroup><col></col><col></col><col></col></colgroup><thead><tr><td aria-sort="Brak" class="ak-renderer-tableHeader-sortable-column__wrapper align-center" colspan="3" data-colwidth="132,93,259">**Modbus Gateways G11 - G13**

</td></tr></thead><tbody><tr><td class="align-center" colspan="3" data-colwidth="132,93,259">[![image.png](https://doc.redisage.com/uploads/images/gallery/2025-07/scaled-1680-/7vEimage.png)](https://doc.redisage.com/uploads/images/gallery/2025-07/7vEimage.png)

  
  
  
</td></tr><tr><th data-colwidth="132">**LED indicator**

</th><th data-colwidth="93">**Color**

</th><th data-colwidth="259">**Function**

</th></tr><tr><td data-colwidth="132">PW

</td><td data-colwidth="93">Blue

</td><td data-colwidth="259">Power

</td></tr><tr><td data-colwidth="132">ETH

</td><td data-colwidth="93">Green

</td><td data-colwidth="259">Network activity

</td></tr><tr><td data-colwidth="132" rowspan="2">ST

</td><td data-colwidth="93">Orange

</td><td data-colwidth="259">Console mode

</td></tr><tr><td data-colwidth="93">Red

</td><td data-colwidth="259">Service mode

</td></tr></tbody></table>

### {{@221#bkmrk-enclosure-dimensions-2}}

{{@221#bkmrk-2u-module-enclosure9-1}}

{{@221#bkmrk--2}}


{{@505}}

SR-D