N-Tron ESERV-12T User Manual
ESERV-11T and ESERV-12T
Ethernet to Serial Servers
User Manual
Table of Contents
INTRODUCTION .................................................................................................................................... 1
About ESERV-1xT Serial Servers ............................................................................................................................. 1
ESERV-1xT Serial Server Model Numbering............................................................................................................ 1
ESERV-1xT Serial Server Features ........................................................................................................................... 2
N-TRON Ethernet Serial Server Configuration Software ......................................................................................... 2
ESERV-1XT SERIAL SERVER HARDWARE ...................................................................................... 3
Package Checklist .................................................................................................................................................. 3
ESERV-1xT Serial Server Enclosures and Mounting ................................................................................................ 3
LED Indicators(ESERV-1xT) ..................................................................................................................................... 3
Link LED ................................................................................................................................................................... 4
Ready LED ................................................................................................................................................................ 4
Serial Port LEDs ........................................................................................................................................................ 4
Mode Switch ......................................................................................................................................................... 4
Ethernet Connector .............................................................................................................................................. 5
Port Connectors .................................................................................................................................................... 5
Power Connector .................................................................................................................................................. 6
Mounting Hardware ............................................................................................................................................. 7
SERIAL SERVER SETUP AND CONNECTIONS ....................................................................... 8
Connecting the Power Supply .............................................................................................................................. 8
Connecting ESERV-1xT Serial Servers to Serial Devices ................................................................................... 8
Connecting the ESERV-11T ...................................................................................................................................... 9
Connecting the ESERV-12T ...................................................................................................................................... 10
Connecting ESERV-1xT Serial Servers to a Network ....................................................................................... 10
Network Connection (10BaseT/100BaseTX) .......................................................................................................... 10
Fiber Optic Connection ............................................................................................................................................ 10
ESERV-1xT Serial Server Configuration Connections ..................................................................................... 10
Configuring the ESERV-1xT Serial Server via the Network Connection ............................................................... 10
Configuring the ESERV-1xT Serial Server via the Serial Port (Console Mode) .................................................... 12
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Table of Contents
ESERV-1xT Serial Server Operational Connections......................................................................................... 13
Using ESERV-1xT Serial Servers in Direct IP Mode ............................................................................................. 13
Using ESERV-1xT Serial Servers in Virtual COM Port Mode ............................................................................... 14
Using ESERV-1xT Serial Servers in Paired Mode .................................................................................................. 15
Initiating a Hardware Reset on the Serial Server .............................................................................................. 16
Reloading Factory Defaults ................................................................................................................................ 17
DESCRIPTION OF SERIAL SERVER PROPERTIES ............................................................. 18
Baud Rate ........................................................................................................................................................... 18
Character Count ................................................................................................................................................. 18
Configuration Files ............................................................................................................................................. 18
Data/Parity/Stop ................................................................................................................................................. 18
Default Gateway ................................................................................................................................................. 18
Delimiter 1, Delimiter 2 and Delimiter Removal ............................................................................................... 19
Delimiter 1 ............................................................................................................................................................... 19
Delimiter 2 ............................................................................................................................................................... 19
Delimiter Removal .................................................................................................................................................. 19
How Delimiters Work.............................................................................................................................................. 19
DHCP.................................................................................................................................................................. 20
Firmware Version .............................................................................................................................................. 20
Flow Control ....................................................................................................................................................... 20
Forced Transmit ................................................................................................................................................. 20
Hardware Version .............................................................................................................................................. 20
Inter-character Timeout ..................................................................................................................................... 20
IP Address .......................................................................................................................................................... 21
Link Status ......................................................................................................................................................... 23
MAC Address ..................................................................................................................................................... 23
Model .................................................................................................................................................................. 23
Network Protocols .............................................................................................................................................. 23
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Table of Contents
Network Watchdog ............................................................................................................................................. 23
Paired Mode ....................................................................................................................................................... 23
Password ............................................................................................................................................................. 23
Serial Interface Modes ....................................................................................................................................... 24
Serial Server Name ............................................................................................................................................. 24
Server Serial Port Number ................................................................................................................................. 24
Subnet Mask ....................................................................................................................................................... 24
TCP (Transmission Control Protocol) ............................................................................................................... 25
UDP (User Datagram Protocol) ......................................................................................................................... 25
VCOM (Virtual COM Port) ............................................................................................................................... 25
UPGRADING THE SERIAL SERVER FIRMWARE ................................................................ 26
Uploading the Firmware to the Serial Server .................................................................................................... 26
DIAGNOSTICS ..................................................................................................................................... 27
Testing a Serial Server Connection .................................................................................................................... 27
Testing a Virtual COM Port .............................................................................................................................. 28
APPENDIX A: DEFAULT SERVER SETTINGS ........................................................................ 30
APPENDIX B: PRODUCT SPECIFICATIONS ........................................................................... 32
General Specifications ........................................................................................................................................... 32
Controls, Indicators and Connector Specifications ............................................................................................ 34
Serial Interface Specifications .............................................................................................................................. 35
Fiber Interface Specifications ............................................................................................................................... 36
Network Specifications .......................................................................................................................................... 37
APPENDIX C: DIMENSIONAL DIAGRAMS ............................................................................. 39
APPENDIX D: CONNECTOR PINOUTS...................................................................................... 41
ESERV-11T Serial Port Pinouts .............................................................................................................................. 41
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Table of Contents
ESERV-12T Serial Port Pinouts .............................................................................................................................. 43
Standard Ethernet Cable RJ-45 Pin-out ................................................................................................................ 44
N-TRON LIMITED WARRANTY ........................................................................................................ 49
v ESERV-1xT (Rev. 1210)
Introduction ESERV-1xT Serial Servers
INTRODUCTIO N
Thank you for purchasing an N-TRON product! This product has been manufactured to the
highest standards of quality and performance to ensure your complete satisfaction.
Figure 1. An ESERV-12T Serial Server
ABOUT ESERV-1XT SERIAL SERVER S
ESERV-1xT Serial Servers connect serial devices (RS-232, RS-422 or RS-485) to Ethernet
networks, allowing the serial device to become a node on the network. The serial ports can
be accessed over a LAN/WAN using Direct IP Mode, Virtual COM Port, or Paired Mode
connections. ESERV-1xT Serial Servers are available with 10BaseT /100BaseTX copper or
multimode fiber media options.
ESERV-1xT Serial Servers are built for use in industrial environments, featuring an IP30
approved slim line DIN rail mountable case. They operate from a range of DC power supply
voltages and feature pluggable terminal block power connectors.
ESERV-1XT SERI AL SERVER MODEL NUMBERING
ESERV-1xT Serial Servers are available with one or two serial connections. Network
connection options include 10BaseT/100BaseTX copper or mulitmode fiber. The following
diagram shows the model numbering scheme:
1 ESERV-1xT (Rev. 1210)
Introduction ESERV-1xT Serial Servers
Model Number
Features
ESERV-11T
1PORT, DB9, ESS, DIN, CU ETHERNET
ESERV-11T-ST
1PORT, DB9, ESS, DIN, FIBER, MULTIMODE, ST
ESERV-12T
2PORT, TB, ESS, DIN, CU ETHERNET
ESERV-12T-ST
2 PORT, TB, ESS, DIN, FIBER, MULTIMODE, ST
ESERV-1 X T SERIAL SERVER FEATU R E S
One or two active serial port options (ESERV-11T/ESERV-12T)
All ports are software selectable as RS-232, RS-422 or RS-485 2- and 4-wire
Configuration can be done via network or direct serial connection
Slim line DIN rail mountable case
Accepts DC power over a wide voltage range
10/100 Mbps Ethernet with Auto Selection
LAN and WAN Communications
TCP Client or Server, or UDP operation - configurable
Virtual COM port and Paired Mode capabilities
Firmware Upload for future revisions/upgrades
Software Support - Windows 2000/2003 Server/XP/Vista
Configuration of Ethernet and serial port settings using N-TRON Serial Server Configuration Software.
N-TRON E THERNET SERIA L S ERVER C ONFIG U R ATION S O FTWARE
N-TRON Ethernet Serial Server configuration software enables you to find connected serial servers, configure
them, upgrade serial server firmware, and save/load configuration files. It features a graphical user interface (GUI)
that is convenient and easy to use. The software also makes it easy to add and remove virtual COM ports on your
computer.
2 ESERV-1xT (Rev. 1210)
Hardware ESERV-1xT Serial Servers
ESERV-1XT SERIA L SERVER HARDWARE
ESERV-1xT Serial Servers are enclosed in DIN rail mountable enclosures and feature LED indicators, power,
Ethernet and serial connectors and a recessed Mode switch.
PACKAGE C H ECKLI S T
ESERV-1xT Serial Servers are shipped with the following items included:
ESERV-1xT Serial Server Module
Quick Start Guide
CD with User Manual, Quick Start Guide and firmware
ESERV-1 X T SERIAL SERVER ENCLO S U RES AND MOUNT I NG
All ESERV-1xT Serial Server models are built into similar enclosures. Modules are DIN rail mountable.
Front View of the ESERV-12T Serial Server
LED INDI CA TORS(ESE RV- 1 XT)
ESERV-1xT Serial Servers have three LED indicators: a Link LED, a Ready LED and two Serial Port LEDs.
Figure 2. LEDs on 1 and 2 Port Serial Servers
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Hardware ESERV-1xT Serial Servers
LI NK LE D
The Link LED illuminates (green) if the Ethernet connection is operating in 100BaseTX mode. The LED is off if the
mode is 10BaseT. When the LED is blinking it indicates that there is data traffic on the Ethernet link.
READY L E D
The Ready LED (green) blinks once per second if the system is operating correctly. If the LED is off, it indicates the
system is not operating correctly.
SERIAL P O RT LED S
ESERV-11T serial servers feature one serial port. ESER-12T serial servers feature two serial ports. Each serial port
has an associated LED. Serial Port LEDs blink (green) when data is being transmitted or received on the serial port.
When the LED is On it indicates the serial port is open.
MODE SW I T CH
A recessed momentary reset switch is located on the top of the enclosure. To activate the switch, insert a small
plastic tool through the hole in the enclosure and press lightly.
The Mode switch can be used to:
Initiate a Hardware Reset
Enter Console Mode
Reload factory defaults
Note: Refer to Section 3. Serial Server Setup and Connections for more information on
using the Mode switch.
Figure 3. Top View of the Serial Server
4 ESERV-1xT (Rev. 1210)
Hardware ESERV-1xT Serial Servers
ETHERNE T CONNE C T OR
Serial server models using 10BaseT/100BaseTX network connections use an RJ45 receptacle. The serial server is
connected to a standard Ethernet network drop using a straight-through RJ45 (male) Ethernet cable.
Figure 4. Ethernet Connector
Note: Refer to Appendix D for connection pin-outs.
Fiber Optic Connectors
Serial server models using multimode fiber Optic network connections use ST style connectors.
Figure 5. ST Fiber Optic Cable Connector
PORT CO N N E CTO R S
ESERV-1xT Serial Servers use three serial port connector configurations, depending on the model:
ESERV-11T serial servers feature one serial port and use a DB-9M connector for RS-232 and a five-position
removable terminal block for RS-422 and RS-485 connections.
ESERV-12T serial servers feature two serial ports, both using five-position removable terminal blocks for RS-
232, RS-422 and RS-485 connections.
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Hardware ESERV-1xT Serial Servers
Figure 6. DB-9 Female Serial Port Connector with Pinout
Figure 7. Five-Position Pluggable Terminal Blocks
Note: Refer to Appendix D for connection pin-outs.
POWER C O NNECTO R
The power connector is a 5.08 mm 2-position pluggable terminal block.
Figure 8. Power Connection
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Hardware ESERV-1xT Serial Servers
MOUNT I N G HARDW A R E
ESERV-1xT Serial Server modules can be DIN rail mounted. The DIN mounting clip and spring is included on each
module.
Figure 9. DIN Clip on a Serial Server Model
7 ESERV-1xT (Rev. 1210)
Setup and Connections ESERV-1xT Serial Servers
SERIAL SERVER SE T U P AND CON N E CT I ONS
This section describes how to setup and connect ESERV-1xT Serial Servers.
Note: In this section devices to be connected to the serial server’s serial connection are
simply referred to as the “serial device”.
CONNECT I NG THE P O WER SUPPLY
Connect a DC power supply to the power terminals on the top of the serial server. Polarity of the wires is indicated
on the label on the side of the serial server. Acceptable voltages are between 10 VDC and 58 VDC. The power
supply must be capable of supplying 4 Watts of power.
CONNECT I NG ESE R V -1XT S E RIAL S E RVER S T O SERI A L DEVI C E S
ESERV-1xT Serial Servers can be configured to connect to serial devices using RS-232, RS-422, RS-485 2-wire
and RS-485 4-wire.
RS-232 connections support eight signal lines plus Signal Ground. Signals are single ended and referenced to
Ground. Default communications parameters are 9600, 8, N, 1 and no flow control implemented.
RS-422 connections support two signal pairs: RXA(-), RXB(+) and TXA(-), TXA(+), plus GND. The data lines are
differential pairs (A & B) in which the B line is positive relative to the A line in the idle (mark) state. Ground
provides a common mode reference.
RS-485 connections support 2-wire or 4-wire operation.
When configured for 4-wire operation the connection supports two signal pairs: RXA(-), RXB(+) and TXA(-),
TXA(+), plus GND. This makes full-duplex operation possible. The data lines are differential pairs (A & B) in
which the B line is positive relative to the A line in the idle (mark) state. Ground provides a common mode
reference.
When configured for 2-wire operation the connection supports one signal pair: DataB(+) and DataA(-) signal
channels using half-duplex operation. The data lines are differential with the Data B line positive relative to Data A
in the idle (mark) state. Ground provides a common mode reference.
8 ESERV-1xT (Rev. 1210)
Setup and Connections ESERV-1xT Serial Servers
CONNECT I NG THE E SERV - 11T
The ESERV-11T has one serial connection that supports RS-232, RS-422 and RS-485 (2- and 4-wire). The unit has
two connectors: a DB-9M connector and a 5-position terminal block.
If you select RS-232 mode when you configure the serial server, you must connect the serial device to the serial
server via a serial cable. The ESERV-11T is a DTE. If the serial device is a DTE, use a null modem (cross-over)
cable. If the serial device is a DCE, use a straight-through cable.
If you select RS-422 mode, RS-485 2-wire mode, or RS-485 4-wire mode when you configure the serial server, you
must connect the serial device appropriately, via the 5-position terminal block.
Note: Refer to Appendix D for connector pinout information.
Figure 10. ESERV-11T Connections
9 ESERV-1xT (Rev. 1210)
Setup and Connections ESERV-1xT Serial Servers
CONNECTING THE ESERV-12T
The ESERV-12T has two serial connections that support RS-232, RS-422 and RS-485 (2- and 4-wire). The unit has
two connectors, both of which are 5-position terminal blocks. Make the appropriate connections to the terminal
blocks to match the serial connection mode you select when configuring the serial server.
Note: Refer to Appendix D for connector pinout information.
Figure 11. ESERV-12T Connections
CONNECT I NG ESE R V -1XT S E RIAL S E RVER S T O A N E T WORK
NETWORK CONNE C T ION ( 1 0 BASET / 1 0 0BASE T X)
When connecting a serial server equipped with a 10BaseT/100BaseTX network connection (RJ45 connector) a
standard network cable is connected from the serial server to a network drop. PCs configuring and/or
communicating with the serial server are also connected to the network.
FIBER OPTIC CONNEC TION
When connecting a serial server equipped with a fiber optic interface to a fiber optic link the appropriate fiber optic
cable must be connected between the serial server and the network interface. Refer to Appendix B for fiber
specifications.
ESERV -1 X T SERI A L SERVE R CON F I G URATI O N CONNE C TIONS
ESERV-1xT Serial Servers can be configured over the network or via a serial port.
CONFIGU R I NG TH E ESE R V -1 XT S E RI AL SE R V ER VI A T HE NET W ORK CO N N ECT I O N
When configuring via the network, either the Ethernet Serial Server Manager software or the web interface can be
used.
10 ESERV-1xT (Rev. 1210)
Setup and Connections ESERV-1xT Serial Servers
CONFIGURI NG W ITH N-TRON 'S ETHERNET SERIAL SE RVER MANAGER
ESERV-1xT Serial Servers can be configured over the network using N-TRON's Ethernet Serial Server Manager
software running on a PC.
To open the software:
1. From the Desktop, click StartProgramsN-TRON Ethernet Serial Server
Manager ESERV Serial Server
a. The Ethernet Serial Server Manager Discovery window appears.
Ethernet Serial Server Manager Discovery Window
2. Configure your serial server as required.
Note: For more information on configuration options refer to Section 4: Description of
Serial Server Properties.
CONFIGURI NG W ITH T HE WE B INT ERFACE
ESERV-1xT Serial Servers can be configured over the network using a standard internet browser such as Internet
Explorer or Firefox.
To open the web configuration interface:
1. On a PC connected to the network, open a browser.
2. In the browser’s address bar, type the IP address of the serial server.
Note: Your serial server comes from the factory pre-configured to receive an IP address
from a DHCP Server. If DHCP assignment is not available it will default to
169.254.102.39
The web interface Login page appears.
11 ESERV-1xT (Rev. 1210)
Setup and Connections ESERV-1xT Serial Servers
3. Configure your serial server as required.
Note: For more information on configuration options refer to Section 4: Description of
Serial Server Properties.
CONFIGU R I NG TH E ESE R V -1 XT S E RI AL SE R V ER VI A T HE SE R I AL PO R T (CO N S O LE
MODE)
Your serial server can be configured via a serial port using the Ethernet Serial Server Manager. To use this feature
the serial server's serial port must be connected to the serial port of a PC (using a null modem cable).
Figure 12. Console Mode Setup
To configure the serial server it must be put into Console Mode, using the Mode switch.
To enter Console Mode, press and hold the Mode switch for between two and ten seconds. The LED indicators
respond as follows:
3. The Ready LED blinks three times per second while the button is being pressed.
4. The serial server is in Console Mode when:
a. On the ESERV-11T: Port 1 LED is On and the Ready LED is Off.
b. On ESERV-12T models: Port 1 LED is On and the Port 2 LED is Off.
12 ESERV-1xT (Rev. 1210)
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