ANTAIRA STE-502C User manual

Serial-Ethernet Server
STE-502C
User’s Manual
Version 2.0

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
Copyright © 2018 Antaira Technologies, LLC
All rights reserved.
1
IMPORTANT ANNOUNCEMENT
The information contained in this document is the property of Antaira Technologies, LLC and is supplied for the
sole purpose of operation and maintenance of products of Antaira Technologies, LLC No part of this publication
is to be used for any other purposes, and it is not to be reproduced, copied, disclosed, transmitted, stored in a
retrieval system, or translated into any human or computer language, in any form, by any means, in whole or in
part, without the prior explicit written consent of Antaira Technologies, LLC.
Published by
Antaira Technologies,LLC
Toll-Free: 1-877-229-3665
e-Mail: [e-mail]
Website: www.antaira.com
Copyright © 2018 Antaira Technologies, LLC. All rights reserved.
All other product names referenced herein are registered trademarks of their respective companies.

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
Copyright © 2018 Antaira Technologies, LLC
All rights reserved.
2
This document is intended to provide customers with brief descriptions on the product and to assist customers
to get started. For detail information and operations of the product, please refer to the manual in the CD
attached.
FCC WARNING
Class A for Ethernet Serial Server
This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part
15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses and radiates
radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user
will be required to correct the interference at his own expenses.
A shielded-type power cord is required in order to meet FCC emission limits and also to prevent interference to
the nearby radio and television reception. It is essential that only the supplied power cord can be used.
Use only shielded cables to connect the device’s RS-232 or RS-485 port.
Be cautioned that changes or modifications not explicitly approved by Antaira Technologies could void your
authority to operate the equipment.

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
Copyright © 2018 Antaira Technologies, LLC
All rights reserved.
3
CONTENTS
1. Introduction.......................................................................................................................................................... 6
1.1 Packaging.................................................................................................................. 6
2. Hardware Setup............................................................................................................................................9
2.1 LED Indicators……………………………………………………………………………..10
2.1.1 LAN LED..........................................................................................................10
2.1.2 COM Port LED .................................................................................................10
2.1.3 RUN LED .........................................................................................................10
2.2 Installation Procedures............................................................................................. 10
3. Software Setup ........................................................................................................................................... 11
3.1 Configuration by Monitor.exe Utility ...........................................................................11
3.1.1 Static IP............................................................................................................11
3.1.2 Auto IP (Dynamic IP)........................................................................................12
3.2 Configuration by Telnet Utility ................................................................................... 13
3.2.1 Login to the System .........................................................................................13
3.2.2 Networking.......................................................................................................14
3.2.3 Change the Password......................................................................................15
3.2.4 COM1 Setup ....................................................................................................15
3.2.5 Configure STE-502C as TCP Client .................................................................17
3.2.6 Configure STE-502C as UDP Client
.................................................................18
3.2.7 COM Port Setting.............................................................................................18
3.2.8 Enabling Serial Data Buffer ..............................................................................19
3.2.9 Setting Packet Delimiter ...................................................................................19
3.3 Configuration Using Web Browser ........................................................................... 20
3.3.1 Log in to the System ........................................................................................20
3.3.2 Change the password ......................................................................................21
3.3.3 Network Setup .................................................................................................23
3.3.4 Configure STE-502C as TCP Server ................................................................23
3.3.5 Configure STE-502C as TCP Client .................................................................25
3.3.6 Pair Connection ...............................................................................................26
3.4 Assign a New IP Address byARP Command ........................................................... 27
4. Using Virtual COM............................................................................................................................... 29
4.1 Setup of a Virtual COM Driver .................................................................................. 29
4.1.1 Pre-installation Requirements ..........................................................................29

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
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4.1.2 Cautions on Use ..............................................................................................29
4.1.3 Limitation .........................................................................................................29
4.1.4 Installation........................................................................................................30
4.1.5 Uninstalling ......................................................................................................30
4.2 Virtual COM Communication.................................................................................... 30
4.2.1 Enable Virtual COM on STE-502C ...................................................................30
4.2.2 Run Serial/IP on Monitoring PC........................................................................32
4.3 Configuring Virtual COM Ports ................................................................................. 32
5. SNMP Setup................................................................................................................................................34
5.1 SNMP Network Management Platform..................................................................... 34
6. Start Writing Ones Own Applications.............................................................................................................. 35
6.1 Preparing the System............................................................................................... 35
6.2 Running the Sample Program .................................................................................. 35
6.2.1 TCPTEST in Visual Basic.................................................................................35
6.2.2 TCPTEST2 in Visual C.....................................................................................36
7. Diagnostics ........................................................................................................................................................37
7.1 Use Standard TCP/IP Utility Ping Command ............................................................ 37
7.2 Use Monitor.exe Configuration Utility Program ......................................................... 37
7.3 Use TCPTEST.exe or TCPTEST2.exe Sample Program
.......................................... 38
Appendix A: Specifications ...............................................................................................................................39
A.1 Hardware Specifications .......................................................................................... 39
A.2 Software Specifications ........................................................................................... 40
A.3 Panel Layout and Connector Pin Assignments ........................................................ 40
A.3.1 Panel Layout ........................................................................................................ 40
A.3.2 DB9 Pin Assignments ......................................................................................41
A.3.3 Ethernet Port (RJ-45).......................................................................................41
A.3.4 Power Terminal Block Connector .....................................................................42
Note: It could be reversed for the pin of VIN- and VIN+......................................................42
A.4 Buzzer/LED Message .........................................................................................42
A.4.1 Buzzer .............................................................................................................42
A.4.2 LAN LED .........................................................................................................42
A.4.3 COM Port LED.................................................................................................42
A.4.4 RUN LED.........................................................................................................43
Appendix B: Upgrade System Firmware .................................................................................................44

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
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B.1 Upgrade Procedures ......................................................................................................44
B.2 Critical Issues of Upgrading............................................................................................45
B.3 Error Messages ..............................................................................................................46
Appendix C: Disable System Firmware....................................................................................................47
Appendix D: Using Monitor.exe Utility.......................................................................................................48
D.1 Run the utility .................................................................................................................48
D.2 Detect Operational Devices............................................................................................48
D.3 Configure Devices ..........................................................................................................48

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
Copyright © 2018 Antaira Technologies, LLC
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1. Introduction
The STE-502C Ethernet Serial Server is a gateway between Ethernet (TCP/IP) and RS-232 or RS-
485/RS-422 communications. The information transmitted by STE-502C is transparent to both host
computers (Ethernet) and devices (RS-232 or RS-485/RS-422). Data coming from the Ethernet (TCP/IP)
is sent to the designated RS-232 or RS-485/RS-422 port and data being received from RS-232 or RS-
485/RS-422 port is sent to the Ethernet (TCP/IP) transparently.
In the computer integration manufacturing or industrial automation area, the STE-502C Ethernet Serial
Server is used for field devices to direct connect to Ethernet network. Terminal Server (main control
program run in STE-502C) transforms whatever data received from RS-232 or RS-485/RS-422 to
TCP/UDP port then connect devices to the Ethernet network via a single application program or multiple
application programs.
Many control devices provide the ability to communicate with hosts through RS-232 or RS-485/RS-422
however RS-232 or RS-485/RS-422 serial communication has its limitations. For one, it is hard to transfer
data through a long distance. With STE-502C, it is possible to communicate with a remote device in the
Intranet environment or even in the Internet and thus, increases the communication distance dramatically.
STE-502C offers two RS-232 or RS-485/RS-422 port, one RJ45 Ethernet and Watch-Dog Timer etc.
1.1 Packaging
Please check ones package contains the following items:
 STE-502C Serial Server
 Quick Start Guide
 Product CD
 Wall mounting screws
 3 pin terminal block for power input
1.2 Application Connectivity
TCP Server Mode：STE-502C can be configured as a TCP server on TCP/IP Network to wait for other
applications (clients) in host computer to establish a connection with the serial
device. After the connection is established between serial device and host
computer, data can be transmitted in both directions.

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
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TCP Client Mode：STE-502C can be configured as a TCP client on TCP/IP Network to establish a
connection with other applications (server) in host computer actively. After the
connection is established, data can be transmitted between serial device and
host computer in both directions.
UDP Mode：UDP is a faster but non-guaranteed datagram delivery protocol. STE-502C
can be configured as a UDP mode on TCP/IP Network to establish a connection using
unicast or multicast data from the serial device to one or multiple host computers. Vice
versa is also true.

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
Copyright © 2018 Antaira Technologies, LLC
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Tunneling Mode：In the case of the serial connection is established with two or more STE-502C to
send data over TCP/IP Network. It can avoid RS-232 interface 15-meter distance
limitation imposed.

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
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2. Hardware Setup
NOTE:
1. Panel layout in Appendix A.3.1
2. One can press the reset button of STE-502C to reset the settings to the default value
Figure 2.1 shows the interface
Figure 2.1 STE-502C interfaces.

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
Copyright © 2018 Antaira Technologies, LLC
All rights reserved.
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2.1 LED Indicators
2.1.1 LAN LED
Message Description
Off Ethernet Disconnected
Blinking with Green Data is transmitting on Ethernet for 100Mbps
Blinking with Orange Data is transmitting on Ethernet for 10Mbps
Table 1. LAN LED Message
2.1.2 COM Port LED
Message Description
Off No data is transmitting on COM port
Blinking Data is transmitting on COM port
Table 2. COM Port LED Message
2.1.3 RUN LED
Message Description
On Jumper JP1 Pin1 and Pin2 are shorted to disable
AP firmware running
Blinking (rate: 0.5 Sec) AP firmware is running normally
Table 3. RUN LED Message
2.2 Installation Procedures
Step 1: Connect STE-502C to power source using 5V DC Jack
(or 9~30V DC Terminal Block power source)
Note：STE-502C provide two power inputs can be connected simultaneously to live DC
power sources. Anyone of the power inputs fails, the other live source acts as a backup
to support power needs automatically. The redundant dual DC power inputs give one
extra assurance of non-stop operation
Step 2: Connect STE-502C to ones Ethernet network. Use a standard straight-through Ethernet cable
when one connect it to a hub/switch, one also can connect it to ones PC‘s Ethernet port via a
cross-over Ethernet cable for easy set up. However, in this case one need to make sure ones
PC is in the same network sub-net as STE-502C.
Step 3: Connect STE-502C’s serial port to a serial device.
Step 4: Placement options. One can mount STE-502C to a wall/panel (Mounting screws included) or
Din-Rail rack (Require optional item model: Din-Rail-Kit DK-25).

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
Copyright © 2018 Antaira Technologies, LLC
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3. Software Setup
STE-502C Ethernet Serial Server is shipped with default settings shown in the following table:
Property Default Value
IP Address 10.0.50.100
Gateway 10.0.0.254
Subnet Mask 255.255.0.0
Firmware 3.609 or Greater
User Name admin
Password default
Firmware 3.605 or earlier
User Name admin
Password Null (leave blank)
COM 1 9600, None, 8, 1, No flow control, buffer disabled, packet delimiter timer 2ms
Link 1 Type: TCP Server, Listen port 4660, Filter=0.0.0.0, Virtual COM disabled
SysName of SNMP Name
SysLocation of SNMP location
SysContact of SNMP contact
3.1 Configuration by Monitor.exe Utility
3.1.1 Static IP
Use monitor.exe that comes with product CD to configure the network parameters of STE-502C.
Please click “Config” button (ref Figure 3.1) then give it a static IP information. (ref Figure 3.2)
Figure 3.1 Configure by monitor.exe utility

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
Copyright © 2018 Antaira Technologies, LLC
All rights reserved.
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Figure 3.2 Static IP setup dialog window
3.1.2 Auto IP (Dynamic IP)
A DHCP server can automatically assign the IP address and network settings. STE-502C supports the
DHCP function. By default, the DHCP function on STE-502C is disabled; one can use Monitor.exe
software to search network information automatically by following steps：
->Execute Monitor.exe (Figure 3.1)
->Click on the IP address of STE-502C in monitor
->Click “Config” button (It will pop-up Dialog Window)
->Check ”Auto IP” (Figure 3.3)
->Click “ Config Now” button(The STE-502C will restart and get IP from DHCP server automatically)
Figure 3.3 monitor.exe Auto IP Dialog Window

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
Copyright © 2018 Antaira Technologies, LLC
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3.2 Configuration by Telnet Utility
One can use Telnet utility to change configuration settings of STE-502C by following steps：
3.2.1 Login to the System
->Open Ms-DOS command prompt window
->Telnet to STE-502C using command “Telnet IP_address”. (For example：Input Telnet 10.0.50.100 in
Ms-DOS command prompt window). After telnet to STE-502C, system prompts for a password, the
default password is default. (Figure 3.4)
Figure 3.4 Login to the system
Note: One can press the default button of STE-502C to reset the password to the default value.
1. After verifying the password, the following terminal screen appears. (Figure 3.5)
Figure 3.5 Main menu
Note:
1. If STE-502C does not receive any command within 1 minute, Telnet will be terminatedautomatically.
2. The changes of networking parameters will take effect only when one exit and restart STE-502C.
->Select “1” from “Input choice and enter (0~4):” to enter overview page as following:( Figure 3.6)

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
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Figure 3.6 Overview
This page gives one the general information of STE-502C including IP and MAC address, SNMP
information, kernel and AP version, and connection status of the device.
3.2.2 Networking
Select “2” from “Input choice and enter (0~4):” to enter Networking page as following: (Figure 3.7)
Figure 3.7 Network settings
This page allows one to change network settings of the device including IP address, subnet mask,
gateway IP address and SNMP information of STE-502C. Please notice that any setting change made on

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
Copyright © 2018 Antaira Technologies, LLC
All rights reserved.
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this page won’t take effect until one restart the device.
Note: Press “ESC” key to return to the previous menu.
3.2.3 Change the Password
1. Select “3” from “Input choice and enter (0~4):” the following screen appears. (Figure 3.8)
Figure 3.8 change the password
2. If one want to change the password, please type the old password in the “Please input old
password” field, type the new password in the “Please input new password” and the “Please verify
new password” fields.
Note: One can press the default key of product to reset password to the default value.
3.2.4 COM1 Setup
Select “4” from “Input choice and enter (0~4):” the following screen appears: (Figure 3.9)
Figure 3.9 Com1 setup
The page gives one the opportunity to configure parameters of COM1 setting which include COM1
working mode, port parameters, enabling or disabling serial buffer’s data and setting packet delimiter.

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
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LINK Mode Setup Configure STE-502C as TCP server：(Figure 3.10)
Type 1 from “Input choice and enter (1~4):” of COM1
Type 1 in the “Input choice (1~5) and enter：”
Input local port in the “Please input local port：” 1.
If one want to enable IP filter：
Input y in the “Do one want to enable IP filter (y/n)?”
Input source IP in the “Please input Filter_IP ：”
Double click “Enter” key
2.If one don’t want to enable IP filter：
Input n in the “Do one want to enable IP filter(y/n)?”
Double click “Enter” key
Input idle time in “Please input idle time to send TCP alive packet(4*10sec)：”(If one input 2->the
sending TCP keep alive packet period will be change to 2*10 sec)
Note:
1. IP filtering function is disabled if setting FILTER_IP to “0.0.0.0”.
2. IP filter is disabled by default
3. If IP filter is enabled, only source IP assigned can connect to STE-502C.
Figure 3.10 Link Mode-TCP server setup

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
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3.2.5 Configure STE-502C as TCP Client
Type 2 in the “Input choice (1~5) and enter：“(Figure 3.11)
Input destination IP in the “Please input Destination IP：”
Input destination port in the “Please input Destination port：”
1.Type 1 for Connected always：
Double click “Enter” key
Input idle time in “Please input idle time to send TCP alive packet(4*10sec)：”(If one input 2->the
sending TCP keep alive packet period will be change to 2*10 sec)
2.Type 2 for Trigger by receiving COM port data：
Input idle time to disconnect in the “Please input idle time to disconnect (0sec , 1~255)：” (If one
input 0->disable the function; if one input 2 ->the serial Inactivity beyond 2 sec will cause disconnect)
Input error retrying time in “Please input waiting time for error retrying (0 minute,1~255)：” (If one
input 0->disable the function; if one input 2 ->the serial Inactivity beyond 2 sec will cause disconnect)
Double click “Enter” key
Input idle time in “Please input idle time to send TCP alive packet (4*10sec)：”(If one input 2->the
sending TCP keep alive packet period will be change to 2*10 sec)
Figure 3.11 Link Mode-TCP client setup

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
Copyright © 2018 Antaira Technologies, LLC
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3.2.6 Configure STE-502C as UDP Client
For example the local port is 4660, the destination IP is 10.0.29.254, destination port is 1234.
(Figure 3.12)
Figure 3.12 Link Mode-UDP client setup
3.2.7 COM Port Setting
Type 2 from “Input choice and enter (1~4):” of COM1, the following screen appears, one can then give
the COM port alias name, set the baud rate and parity, determine number of data bit and stop bit, and
decide if one want to use flow control and the type of flow control one want to use. (Figure 3.13)
Figure 3.13 Com port setting

User’s Manual Version 2.0
Serial to Ethernet Device Server
STE-502C
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3.2.8 Enabling Serial Data Buffer
Type 3 from “Input choice and enter (1~4):” of COM1, by default COM port serial data buffer is enabled
meaning that when TCP/IP Ethernet connection is broken, serial data collected from serial device will be
empty in STE-502C once TCP/IP connection is resumed, the serial data will be sent through Ethernet
connection, one can disable it if one wish. (Figure 3.14)
Figure 3.14 Com port-Enabling serial data buffer
3.2.9 Setting Packet Delimiter
Packet delimiter is a way of controlling packets within serial communication. It can prevent packets from
being cut thus keep the packets complete. STE-502C provides two ways of parameter setting as inter
character timer and terminator. By default packet delimiter timer is 1 ms, one can change timer shown in
the following figure:( Figure 3.15)
Figure 3.15 Setting packet delimiter timer
One can also choose character pattern as the packet delimiter indicated in the following figure: (Figure
3.16)