Data Sheet

RemoteCOM (C20 - C25)

RemoteCOM is a complete hardware and software solution for creating remote communication ports. The software part can be uploaded to any of the Redisage C20 - C25 Ethernet Converters. It provides a communication between a LAN host and a device equipped with RS232/RS485 serial interfaces. A dedicated app makes it easy and fast to configure and deploy. There is a possibility to create virtual COM ports with the Redisage Configurator to minimize number of cables.

C20 C21 C22 C23 C24 C25

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Features

  • Ethernet 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

Introduction

C20 - C22 are a products family of reliable converters based on the ESP32 Xtensa LX6 microcontroller, extending the capabilities of industrial devices.
C23 - C25 are a products family of reliable converters based on the STM32F4 microcontroller, extending the capabilities of industrial devices.

The addition of a network interface allows remote access and full control over communication via a computer.

The user performs the basic configuration of transmission parameters in a browser or via a Telnet/serial console. 

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

Specifications

Redisage PN

C20

C21

C22

C23

C24

C25

Ports

RS232

2x

-

-

4x

-

2x

RS485

-

1x

-

-

4x

2x

RS232/RS485

-

-

2x

-

-

-

Microcontroller

ESP32

STM32F4

WiFi

N/A

Power

Voltage

12-30 VDC

Power

< 1 W

Frame ground connection

yes

Baud rate

up to 115200 bps

LED indicators

communication Tx, Rx and power

RS485 termination

120 ohm manually enabled

Connector

RS232/RS485

8-pin terminal block max. 2.5 mm2 wire

Power

3-pin terminal block max. 2.5 mm2 wire

Ethernet

RJ45

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

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

Variants

C20 - Ethernet Converter 2 x RS232

C21 - Ethernet Converter 1 x RS485

C22 - Ethernet Converter 2 x RS232/RS485

In the C22 converter user should use only RS232 or only RS485 interface of one port as they occupy the same internal bus of the device.

C23 - Ethernet Converter 4 x RS232

C24 - Ethernet Converter 4 x RS485

C25 - Ethernet Converter 2 x RS232 & 2 x RS485

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.

Pin assignments

C20

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C21

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C22

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C23

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C24

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C25

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Enclosure dimensions

2U Module Enclosure
98 x 22.5 x 56.4
Units: mm

image (3).webp

Getting started

Power supply

Ethernet converters C20 - C25 have wide voltage power input (12-30 VDC) and the power consumption is less than 1 W.

LED indicators

Ethernet converters C20 - C22 have 3 LED indicators:

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Ethernet converters C23 - C25 have 5 LED indicators:

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Configuration by the Web Page

Default configuration of the Ethernet Converters:

Default login details:

To access to the web page open the web browser, type the IP address in the address bar and log in using the default user name and password. The device and a PC must be connected to the same Local Area Network.

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After a successful login, the status page will show the current status of the ports.

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To change the user name and password click on the user icon and select “Edit user”.

Ports configuration is available on the “Ports” page.

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Item

Description

Service

RemoteCOM

The RemoteCOM option lets to attach the port to a computer running the Redisage Configurator as if it would be physically present in the computer.

TCP Socket

TCP/UDP Socket exposes this port as a regular network socket - connect to this socket with own software and write/read data to send/receive data over the serial port without any additional software or serial port handling.

UDP Socket

Port

The service number - the device has an “IP Address” by which it is identified and a couple of services running on it. It's required to tell the device which service should be in use by entering this device's IP address and the port number in the RemoteCOM client or user’s software.

Connection Timeout [s]

The time specifying how often (every how many seconds) the "keep alive" packet will be sent to check if the client is still connected. Value 0 means that the connection is kept permanently without any timeout.

Inactivity Time [ms]

The maximum allowed time in milliseconds during which there is no data transfer. When connection is inactive for the time longer or equal to the entered value, then it will be closed. Value 0 means there is no measure of the inactivity time at all.

Encryption

Determine how the data is protected 'in flight' over a network. It is available only with the RemoteCOM service. Once enabled, it is necessary to set the password.

Password

Protect the communication between the device and various clients - keep it secret! Same settings have to appear in clients - without the correct passwords, a client will not be able to connect at all.

Termination

Enable/disable termination on the RS line.

Baud Rate

Determine the port's transmission speed over the data channel.

Data Bits

Determine the number of data bits in the port's message frame.

Parity

Enable/disable parity check in the port's message frame.

Stop Bits

Determine the number of stop bits in the port's message frame.

Notes

These notes are for information only - feel free to write down anything related to this port (device it connects to, etc.). They're also shown in the Configurator during the device discovery - in the other words, they're public.

Changing port’s service closes all sockets connected to the ports.

In the UDP mode, port number 15051 is reserved for UDP broadcast service.

Network settings can be changed on the “Network” page.

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Item

Description

Configuration Method

Enable/disable the DHCP server. If the DHCP server is disabled, the IP address of the device has to be set manually.

IP Address

IP address of the device.

Netmask

Netmask associated with the IP address.

Gateway

Gateway address currently used by the device.

MAC Settings

Allow setting the default MAC address or typing it manually.

MAC Address

Allow changing the physical address of the device.

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Item

Description

HTTP Port

Determine the port of the control panel.

Telnet Port

Allow connection with the device via Telnet.

Broadcasts

Notify RemoteCOM clients in the same network about this device's existence. With this enabled, the Configurator will automatically set most of the settings correctly after picking the correct port.

Hostname

Label that is assigned to the device.

DNS Address 1 (Primary)

Primary Domain Name System used by the device.

DNS Address 2

Domain Name System used by the device.

On the “Device” page there are tools used to a firmware update, a factory reset and a device reboot.

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On the “Info” page there is information about firmware, model, serial number and frontend version.

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Configuration by the Serial Console

The device has the ability to be reconfigured via a serial console. C20 - C22 require a dedicated USB/UART converter connected to the USB micro-B connector on the front of the device. C23 - C25 can be directly connected to a PC through a USB cable.

Procedure to enter serial console mode on C20 - C22
Procedure to enter serial console mode on C23 - C25

Once this is done, log in using the default username and password, then change the network settings using "ipconfig" command.

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List of all commands

Command

Description

help

Print the help.

conn

Print active TCP connections.

eth_mac

Print or change MAC address.

exit

Close current CLI session.

http_port

Print or change default http port.

ipconfig

Print or change the network configuration.

net_stat

Print lwIP statistics.

ping

Check internet connection with the desired host.

restart

Restart the system.

reboot

Same as restart.

sys_heap_usage

Print current heap usage.

telnet_port

Print or change default telnet port.

uart

Print or change uart configuration.

uart_service

Print or change uart_service configuration.

user

Print or change user configuration.

Ports configuration commands

In terms of ports configuration it is possible to change parameters like: service, baud rate, data bits, parity, stop bits and so on. UART commands are provided below.

Network settings

The following commands might be helpful to change network settings according to target LAN parameters. 

Changing username or password

To change username or password, use user command. Available commands:

Configuration by the Telnet Console

Access to the Telnet console can be obtained using a serial terminal program. Configure the connection type to Telnet, enter the IP address and Telnet port number (23 by default).

Telnet console commands are the same as ones described in the serial console section.

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Redisage Configurator

To configure the RemoteCOM ports use the Redisage Configurator program. Redisage Configurator is an app used to emulate a connection between the converter and a PC as if it would be connected directly to the COM port.

Configuration procedure

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If any change is made to the port configuration, make sure to apply it with the “Save Changes” button.

Reset to factory defaults

Reset to factory defaults is possible on the web page in the device section or using the service mode. 

Service mode

Procedure to enter service mode for C20 - C22 converters
Procedure to enter service mode for C23 - C25 converters
List of commands in the service mode

Command

Description

help

Print the help.

credits

Print current credits value for this device.

dev_ident

Print the device identification value.

restart

Restart the system.

serial_num

Print the serial number of this device.

version

Display the bootloader version.

xmodem

Download image to the internal flash using xmodem.

defaults

Reset application variables to defaults.

ipconfig

Print or change the network configuration.

flash_read

Read bytes from flash memory.

md

Read bytes from memory address.

In the service mode, the “ipconfig” command can only show a last static IP address.

Additional notes

Products family sample photo

https://redisage.com

DISCLAMER 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


Revision #106
Created 25 March 2024 15:14:58
Updated 26 July 2024 14:41:48 by Jan Górski