Hardware
Modbus Ethernet Wi-Fi Gateways (G11 - G13)
Modbus Gateway can be installed on any device from Redisage G11 - G13 Modbus Gateways family.
Features
Variants
G11 - Ethernet + Wi-Fi Modbus Gateway 2 x RS232

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

G13 - Ethernet Modbus Gateway 2 x RS232/RS485

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.
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.

If earth ground is not available FG can be left floating or it can be connected with the power supply GND.
Specification
Redisage PN |
G01 |
G02 |
G03 |
|
Ports |
RS232 |
2x |
- |
- |
RS485 |
- |
1x |
- |
|
RS232/RS485 |
- |
- |
2x |
|
Microcontroller |
ESP32 |
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WiFi |
2,4 GHz b/g/n |
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Power |
Voltage |
12-30 VDC |
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Power |
< 1 W |
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Frame ground connection |
yes |
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Baud rate |
up to 115200 bps |
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LED indicators |
communication Tx, Rx and power |
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RS485 termination |
120 ohm manually enabled |
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Connector |
RS232/RS485 |
8-pin terminal block max. 2.5 mm2 wire |
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Power |
3-pin terminal block max. 2.5 mm2 wire |
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Ethernet |
RJ45 |
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Transmission |
RS485 |
max. 1,200 m at 9.6 kbps; max. 400 m at 115.2 kbps |
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RS232 |
max. 15 m at 115.2 kbps |
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Mounting and enclosure |
DIN rail, plastic PA - UL 94 V0, black/green |
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Temperatures |
-40°C to +75°C operating and storage |
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Humidity |
10 - 90% RH, non-condensing |
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ESD protection |
±4 kV contact discharge / ±8 kV air discharge |
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Certification |
CE, RoHS, EMC, LVD |
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Norms |
61000-6-2 - Immunity standard for industrial environments 61000-6-4 - Emission standard for industrial environments |
LED indicators
Modbus Gateways G11 - G13 |
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|
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LED indicator |
Color |
Function |
---|---|---|
PW |
Blue |
Power |
ETH |
Green |
Network activity |
ST |
Orange |
Console mode |
Red |
Service mode |
Pin assignments
G11 |
G12 ![]() |
G13 |
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.