Usconverters BIT COMMANDER US2000A User manual

Serial RS232 / RS485 Ethernet Converter Manual – US2000A WWW.USCONVERTERS.COM
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BIT COMMANDER
Serial RS232 / RS485 to Ethernet Converter
(Part US2000A)

Serial RS232 / RS485 Ethernet Converter Manual – US2000A WWW.USCONVERTERS.COM
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Contents
Overview and Features........................................................................................................3
Functions…………………………………………………………………………………………..5
TCP Server Mode..........................................................................................................5
Httpd Client Mode…………………………………………………………………………….5
TCP Auto mode…………………………………………………………………………...….6
WEB to Serial mode………………………………………………………………………...6
Hardware .............................................................................................................................7
LED status.....................................................................................................................7
RS232 interface.............................................................................................................7
RS485 interface.............................................................................................................8
RJ45 interface................................................................................................................8
Reset .............................................................................................................................9
Parameter configuration ......................................................................................................9
Web browser..................................................................................................................9
Serial port ......................................................................................................................9
Configuration software.................................................................................................11
Other Functions and Features...........................................................................................12
Hardware flow control..................................................................................................12
User MAC address......................................................................................................12
Telnet Timeout.............................................................................................................13
Send reset (RST) command over Ethernet.................................................................14
Firmware update..........................................................................................................15
Default Screenshots ..........................................................................................................17
FAQ....................................................................................................................................23
IP address: 192.168.0.7
Default parameters:
Subnet mask: 255.255.255.0
The default gateway: 192.168.0.1
User name: admin
Password: admin

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Introduction
Overview
The US2000A is a light-industrial grade serial RS232 / RS485 to Ethernet converter which can
be used to connect any standard RS232 or RS485 serial device to a computer over a standard
Ethernet network.
It has a strong aluminum housing with screw mounting holes for easy installation which makes
it ideal for most factory environments and other commercial facilities.
This converter is designed around the ARM Cortex-M3 chipset which makes it a very reliable
converter with several advanced features and functions.
The included virtual COM software will allow you to create two serial ports, one RS232 and
one RS485 which can be used individually at the same time.
The parameters of the adapter can be configured by a web-browser, through the serial port or
by using the downloadable configuration software.
Overall Features
1. ARM Cortex-M3 processor; stable, reliable and multiple advanced functions.
2. RTS/CTS hardware flow control.
3. Both serial ports (RS232 and RS485) can be used individually at the same time (two
virtual COM ports are created in your computer).
4. Support TCP Server, TCP Client, UDP, UDP Server, HTTPD Client, DHCP, Web to
serial, TCPAuto, ModBus TCP.
5. Virtual COM port software for Windows included.
6. Baud rates: Port 0 (RS232) 110 - 256000bps, Port 1 (RS485) 110 - 1024000bps.
7. Wide voltage range: 5 – 18VDC
8. Supports DHCP and UDP broadcast protocol.
9. TCP/IP SOCKET programming examples available: VB, C++, Delphi, Android, IOS.
10. Parameter configuration via web-browser.
11. Ethernet RJ45 port status indicator lights with built-in 2KV isolation.
12. Auto-MDI/MIDX function, cross-over or direct network cable, automatic switching.
13. Option for unique IEEE MAC address, the user can define MAC address (special
orders for over 100pcs only).
14. Firmware upgrade over network.
15. Support IP and domain name at the same time
16. Supports up to 8 clients per port in TCP mode.
17. Built in Keep alive function.
18. TCP Server mode supports transparent and ‘ID’ communication modes.

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Applications
Fire and Security Panels
Vending Machines
Point of Sale Terminals
Remote equipment management
IT management services
Access Control
Industrial Control
Home Automation
Instrumentation
Building Control
Power Management

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Most of this converter’s parameter settings are self-explanatory so we will here just mention the available
special functions.
Functions
TCP Server mode
TCP Server mode has 2 parameters: max link number and link type.
1. Max link number: 1 - 4;
2. Link type: Typical: completely transparent, data is sent to all clients.
Extend 1, communicate with ID, otherwise abandon.
Extend 2, communicate with ID, otherwise send to all clients.
Httpd Client mode
This function is mainly used for web page development. PHP example code to create a web server page:
[<?php echo $_GET['data']; ?>]
This means that we can GET data from HTTP client’s request. Open the following URL to see the data:
www.usconverters.com/1.php?data=12345
The web page is shown below, we can see that the web server have received the data (12345).
Diagram 2-1 Request www.usconverters.com/1.php? and upload data

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TCP Auto mode
If the converter is set to ‘TCP Auto mode’ it will when powered on work as a TCP Server, it
listens on a local port, but if there is data received from the serial port before any connection is
made, the converter will try to connect to the remote IP and port as a TCP Client.
WEB to Serial mode
Communication between serial port and admin web page.
1. Receive window show data only when “Read” button is clicked or when selecting the “Auto
read” checkmark.
2. Regardless if WEB to Serial mode is selected or not, the send web data to serial screen is
always active.

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Hardware
1) Mechanical dimensions: 90 × 84 × 25mm, including RJ45 and connector
2) +5 ~ +18V power input
3) 2 x serial (1 x RS232, 1 x RS485)
4) 1 x RS232 support hardware flow control
5) 1 x RS485
LED status
The converter has 4 indicator lights:
ID Name Description
1 Power (red) Bright after power on
2 Work (green) Flash at work
3 Link (green) In RJ45 port, bright after network connection
4 Data (yellow) In RJ45 port, flash if there are data on network
RS232 interface
Standard DB9 male connector:
Number RS232 Description
1 - -
2 RXD Receive
3 TXD Transmit
4 - -
5 GND Signal ground
6 - -
7 RTS Request to send
8 CTS Clear to send
9 - -

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RS485 interface
The RS485 interface has a screw terminal connector with A+ (D +), B- (D-) and GND. .
RJ45 interface
The Ethernet port supports 10 M / 100 M adaptive, AUTO MDI/MDIX, will work with standard
straight through and cross-over Ethernet cables.
Pin Name Description
1 TX+ Transceiver Data+
2 TX- Transceiver Data-
3 RX+ Receive Data+
4 n/c Not connected
5 n/c Not connected
6 RX- Receive Data-
7 n/c Not connected
8 n/c Not connected

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Reset
The reset button will reset all settings to factory defaults.
To reset:
1. Press and hold the button while connecting the power supply.
2. Release the reset button and the unit will reboot with factory settings.
The default parameters are:
Address type：Static IP
Static IP Address：192.168.0.7
User name：admin
Password：admin
Default settings can also be set by software:
Parameter configuration
The parameters can be configured by logging into the converter by using a standard web
browser, through the serial port or by using the software utility.
Web browser
Simply use a web browser and login to the converter at IP address 192.168.0.7.
Serial port
Power on the converter and press the reset button. The converter will now go into
configuration mode. The default port parameters are:
9600, 8, N, 1,

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The converter will send the character ‘U’, indicating that it is in serial configuration mode.
The character ‘K’ indicates successful configuration.
The character ‘E’ indicates an error.
Press the reset button after the parameters has been changed and the new configuration will
take effect.
Protocol structure and examples:
name Byte Description example Hex(low front)
head 2 Head(55 BA/55 C1/55 C2) 55 BA 55 BA
Target IP 4 Target IP 192.168.0.201 C9 00 A8 C0
Target port 2 Target port 8234 2A 20
Module IP 4 Module IP 192.168.0.7 07 00 A8 C0
Module port 2 Module port 20108 8C 4E
gateway 4 Gateway IP 192.168.0.201 C9 00 A8 C0
Work mode 1
1 for TCP Client;0 for UDP; 2
for UDP Server; 3 for TCP
Server
TCP Client 01
Baud rate 3 Serial baud rate 115200 00 C2 01
serial param 1 Databits, stopbits, verifybits N,8,1 03
Unique ID 3 ID-H, ID-L, ID-type, 0 for no
use
No use 00 00 00
Subnet mask 4 Subnet mask, low front 255.255.255.0 00 FF FF FF
Sum verify 1
Sum verification, from target
ip until end
(sum itself not included)
sum B9
Total cmd：55 BA C9 00 A8 C0 2A 20 07 00 A8 C0 8C 4E C9 00 A8 C0 01 00 C2 01 03 00
00 00 00 FF FF FF B9
Example:
55 BA for writing to Port 0，55 BC for reading port 0
55 C1 for writing to Port 1，55 C3 for reading port 1

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Configuration software
(1) Click ‘Search Device’.
(2) Select device in search list.
(3) Modify parameters.
(4) Click ‘Base Save’ and the parameters will be saved.
(5) Click ‘Save Config’ and the new parameters will take effect.
Notice:
After modifying the parameters, first click ‘Base Save’ or ‘Save COM(0)’, then click
‘Save Config’. If not, the parameters will only be saved, but not take effect.

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Other Functions and Features
Hardware flow control
The RS232 interface supports hardware flow control（RTS/CTS）
Pin name Description IO type
RTS Request to Send O
CTS Clear to Send I
When RTS = 0, enables the other side to send, at this time, TTL is 0 volt, RS232 is -3V ~ -15V.
When CTS = 0, the converter is enabled to send, at this time, TTL is 0 volt, and RS232 is -3V ~
-15V.
User MAC address
The MAC address by default is 6 bytes (0xff): FF-FF-FF-FF-FF-FF.
MAC address example: ac- cf-23-20-fe-3d;
The user can change the MAC address through a web browser.
Enter the new address with ‘-’ between each byte, (it will also work with just a ‘space’ between
each byte). Click ‘Update Settings’ to save the new address, and reset the converter for the
changes to take effect.

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Telnet Timeout
Telnet timeout is by default not in use, the value is set to 0 as shown below, which means it is
disabled. The max time out is 255 seconds.
If no data is present within the specified time out, the converter will disconnect and attempt to
reconnect.
When TCP Server mode is selected, the converter will disconnect with from the client, release
the resources, wait for a new connection and clear the time out count.
When TCP Client mode is selected, the converter will disconnect from the server and
reconnect.
Telnet timeout represent no signal reconnect timeout.

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Send reset (RST) command over Ethernet
This command can only be used with firmware 2002 and up.
Use UDP broadcast and send data to 255.255.255.255, port 1901.
Command structure:
function head len(from cmd tobefore
verify)
cmd User /password verify(sum)
reset FF 0D 02 [usrname]
[password]
xx
For example:
FF 0D 02 61 64 6D 69 6E 00 61 64 6D 69 6E 00 20
Converter will respond (4 Byte):
FF 01 02 4B (command success) 4B = 'K';
or
FF 01 02 45 (user name and password false) 45 ＝'E'.

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Firmware update
Firmware updates can be made by using the configuration software. Updates can only be
done by connecting directly to the converter, not over a network.
1. Click search and select the converter:
2. ‘Device’ -> firmware update

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Click “Program” to start the update progress.
3. Update success, click exit.
Notice: If the configuration software cannot find the converter after the firmware update,
please reset the converter to factory defaults and click search again.

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Default Screenshots

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