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Data Sheet

Modbus TCP/RTU M-bus Gateways (G20, G30)

G04G30

Features

  • Serial ports RS232 and RS485
  • Up to 10 simultaneously connected slave devices
  • ESD protection for the RS232/RS485 data line
  • 3000 VDC isolation protection
  • Power supply: +12 to +30 VDC or 24 VAC
  • Transmission speed up to 9600 bps
  • Fast Ethernet 10/100 Mb/s
  • Wi-Fi 802.11b/g/n 150 Mbps / 2.4 GHz (G30 only)
  • Tx, Rx and power LED indicators
  • RS485 embedded termination 120 ohm
  • Operating temperatures: -40°C to +75°C
  • DIN-rail mounting
  • Dimensions: 90 x 56,4 x 40 [mm]
  • 3 years warranty
  • Customization of OEM is welcomed


Introduction

G20 and G30 products are reliable M-Bus to Modbus gateways. They enable communication in master mode with up to 10 simultaneously connected slave devices with Modbus protocol. Dedicated EMC integrated circuits guarantee improved connection quality by limiting the impact of interferences typical for an industrial environment.

Specifications

Redisage PN

G20

G30
Converter ports Serial 1 x active RS232/RS485
M-Bus 1 x M-Bus master with up to 10 x slaves
Microcontroller ESP32
Wi-Fi N/A 802.11 b/g/n

Power

Voltage

12-30 VDC
Power < 1 W
Frame ground connection yes

Serial
interface

 RS232 TxD, RxD, GND
RS485 A, B
M-Bus MBus+, MBus -

Baud rate

up to 9600 bps
LED indicators communication Tx, Rx, power
RS232 OK
RS485 termination 120 ohm manually enabled
3000 VDC isolation side RS232/RS485
Connector
 RS232 3-pin terminal block max. 2.5 mm2 wire
RS485 3-pin terminal block max. 2.5 mm2 wire
Power 3-pin terminal block max. 2.5 mm2 wire
M-Bus 3-pin terminal block max. 2.5 mm2 wire
Ethernet RJ45 Fast Ethernet 10/100 Mb/s

Transmission
distance

RS485

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)
RS232 max. 15 m at 115.2 kbps
M-Bus see: M-Bus max. transmission distance (below)
Mounting and enclosure DIN rail, plastic PA - UL 94 V0, black/green
Temperatures -40°C to +75°C operating and storage
Humidity 10 - 90% RH, non-condensing

ESD protection

±4 kV contact discharge / ±8 kV air discharge
Certification  CE, RoHS, EMC, LVD, RED
Norms
  • 61000-6-2 - Immunity standard for industrial environments
  • 61000-6-4 - Emission standard for industrial environments
  • 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

M-Bus max. transmission distance

image.webp

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.

Variants

G20 - M-Bus to Modbus Gateway (1x RS232/RS485)

G30 - M-Bus to Modbus Gateway (1x RS232/RS485) + Wi-Fi

In the G20 and G30 gateways, 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 RS232 & RS485 at the same time!

 

Pin assignments

image.png

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Enclosure dimensions

Additional notes

Related information and links
Ordering information Accessories Similar products

Products family sample photo

https://redisage.com

DISCLAIMER NOTES
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.

Datasheet-ID: 

SR-D

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