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Quatech Ethernet to Serial Servers
Quatech Ethernet to Serial Servers

Quatech Ethernet to Serial Servers

Quatech's high performance serial device servers feature a PowerPC® from Freescale™ (formerly Motorola® Semiconductor). This processor is part of a world-class architecture that offers the lowest latency available anywhere. In addition, the auto-sensing 10/100 Ethernet interface, and Quatech's proven high-speed, 921k-baud serial technology offer the best performance in the industry and ensure that your critical business applications won't be harmed by data throughput issues.

Installation Wizard - Easy to set up and install, Quatech Device Servers are up and running on your network in 10 minutes or less. A unique Installation Wizard automatically searches for and identifies any Quatech unit attached to the network, even searching remote subnets if needed. No client software is installed on your PC, just a small set of drivers that configures each serial port as a new COM port on the PC. This allows software applications to access the attached serial device as they are designed to, with no custom programming needed. Simply point your software application to the new, "virtual" COM port and you're all set!

Serial Tunneling - Do you have two serial devices that communicate directly with each other and you wish to replace the short serial cable using the distances possible with Ethernet technology? The two serial devices will then communicate as if connected by a short serial cable; the Ethernet portion will be invisible to the devices.

Auto TCP Feature - For remote service and monitoring applications, try our AutoTCP feature. The serial port can be set up to act as a TCP Client, requesting a connection whenever the serial device is attached and powered on or, if you prefer, whenever serial data is ready for upload to the host computer. You can leave the connection on, or disconnect from the host after a specified period. But when a service request from a remote monitoring PC (with a specified IP address) arrives, the device server will act as a TCP server, allow access to the serial device to the monitoring PC, and go back to Client mode when the Server session is finished.

Industrial Enclosure - Quatech Device Servers are housed in a solid metal case suited for rugged industrial environments and a surge suppression option is available, as are DIN rail mounting for individual units, and rack mount kits for multi-port models.

Software Selctable MEI - The 400 Series models introduce a software-selectable, RS-232/422/485 multi-electrical interface (MEI) to the device server product line. These units can be configured for RS-232 or for RS-422 or RS-485 asynchronous communication in either full-duplex or half-duplex mode.



  • Easy installation and configuration in under 10 minutes. PowerPC® microprocessor drives high throughput and industry's lowest latency
  • Network enable any RS-232, RS-422 or RS-485 serial devices for remote access and control
  • Remote Web browser-based configuration, administration and troubleshooting
  • Auto-detecting 10/100 Mbps Ethernet with built-in TCP/IP
  • Raw TCP and IntelliSock™ TCP socket services for custom applications
  • Configure as TCP Server, TCP Client, or as both using the exclusive AutoTCP feature
  • Serial Tunneling mode for connecting two serial devices over a network without a PC
  • Serial speeds to 921.6 kbps
  • 1, 2, 4, or 8 independent RS-232 or software-selectable RS-232/422/485 serial ports
  • DB-9 and RJ-45 models available
  • Surge suppression package available
  • Virtual COM drivers for Windows Windows NT4/2000/XP/Vista/7 & Linux, other OS support via socket modes
  • Full-duplex and half-duplex communication supported (RS-232/422/485)
  • PowerPC® microprocessor eliminates data bottlenecks and common latency issues (RS-232/422/485)
  • 5 year limited warranty
  • RoHS compliant
  • Port-Powered models with standard surge suppression and +5V at the port
  • Embedded models with standard surge suppression are available (RS-232 only, 1 or 2 ports)

Detailed Specifications: Serial Device Servers

LAN Interface: 10/100 BaseT (IEEE 802.3), auto-negotiation. RJ-45 Network connector
Auto MDI/MDIX and RJ-45 Ethernet connector
Serial Interface: RS-232 (EIA-232), asynchronous DTE configured with full modem control and hardware flow control; Configurable as RS-232 or RS-422 or RS-485 (RS-232/422/485)
Serial Connectors: Standard DB-9 male for "D" models (see connector pinout)
RJ-45 10-pin for "M" models (see connector pinout)
Optional Adapters: SDS-RJ45-10: RJ-45 10-pin adapter for "D" models, with flying leads for custom configuration
Port-Power: SSE-100D-5V and DSE-100D-5V provide +5V at Pin 9 on the DB-9 serial port connector
Serial Ports: SSE: 1 port   DSE: 2 ports   QSE: 4 ports   ESE: 8 ports
OS Support: Windows NT4/2000/XP/Vista/7 and Linux. Raw TCP, Raw UDP, Tunneling, AutoTCP and and IntelliSock™ modes are OS independent.
Data Rate: 921.6 kbps max per port.
UARTs: SSE: 16C550 with 16-byte FIFO
DSE/QSE/ESE: 16C750 with 64-byte FIFO
Receiver Inputs: RS-232:
Input Voltage Rating: -15V to +15V
Receiver Skew: 120 ns (typical), 250 ns (maximum)

Input Voltage Rating: -15V to +15V Common Mode Input Voltage
Receiver Skew: 13 ns (typical)
Transmitter Outputs: RS-232:
High Level Output: +5V (minimum), +5.4V (typical)
Low Level Output: -5V (minimum), -5.4V (typical)
Transmitter Skew: 50 ns (typical), 200 ns (maximum)

Transmitter Outputs: 2V min for 100 Ohm load
Transmitter Skew: 5 ns (typical), 10 ns (maximum)
Distance: 4000 feet
Parity, Stop bits: Parity Configurable as: None, Even, Odd
Data Bits Configurable as: 5, 6, 7, 8
Stop Bits Configurable as: 1, 1.5, 2
Surge Suppression: Surge suppressor applied to each line that is capable of sustaining up to 40A peak, 8 x 20µs transient surges, a clamping voltage of 30V and a peak energy dissipation of 0.1 Joules. (NOTE: The "SS" option limits data rate to 115.2 kbps due to capacitive loading). Standard on 100D-5V models, optional on all other models.
Hardware: Processor: Freescale™ PowerPC®
FLASH Memory: 2 MB
Firmware stored in FLASH may be upgraded via LAN interface
Protocols and Software: Management Protocols: UDP, TCP/IP, HTTP, DHCP, ARP, SNMP
IP Configuration Methods: DHCP or Static IP set through Installation Wizard, or custom UDP datagram utility (with command line interface) for unattended installations
Quatech Utilities:
* Windows Device Manager (Quatech Device Manager in Windows NT)
* On-board HTML pages accessible from a standard web browser
* Simple Network Management Protocol (SNMP)
* Intellisock™ TCP socket services
Communication modes: Normal, Tunneling, Raw TCP, Auto TCP, Raw UDP, Intellisock TCP socket services
Power Supply: +5V, 2A (10 W) max DC, with auto-sensing AC adapter provided for 100VAC-240VAC, 50Hz-60Hz worldwide operation
Environment: Operating Temperature: 0°C to 70°C
Storage Temperature: -40°C to 70°C
Humidity: 10% to 90% non-condensing
Dimensions: SSE/DSE:
Height: 1.18” (2.99 cm)
Width: 3.33” (8.46 cm)
Depth: 4.69” (11.91 cm)

Height: 1.35” (3.43 cm)
Width: 9.96” (25.30 cm)
Depth: 4.69” (11.91 cm)

Height: 1.96” (4.97 cm)
Width: 9.96” (25.30 cm)
Depth: 4.69” (11.91 cm)
Certifications: CE, FCC Class B, RoHS and WEEE compliant

Quick Start Guide   Manual  Datasheet


Ordering information:

Model No. Discripctions
SSE-100D 1 port RS-232 Serial Device Server (DB9)
SSE-100D-5V 1 port RS-232 Port-Powered Serial Device Server with surge suppression and +5V at pin 9
DSE-100D 2 port RS-232 Serial Device Server (DB9)
DSE-100D-5V 2 port RS-232 Port-Powered Serial Device Server with surge suppression and +5V at Pin 9
QSE-100D 4 port RS-232 Serial Device Server (DB9)
QSE-100M 4 port RS-232 Serial Device Server (RJ45)
ESE-100D 8 port RS-232 Serial Device Server (DB9)
ESE-100M 8 port RS-232 Serial Device Server (RJ45)


Model No. Discripctions
SSE-400D 1 port RS-232/422/485 Serial Device Server (DB9)
DSE-400D 2 port RS-232/422/485 Serial Device Server (DB9)
QSE-400D 4 port RS-232/422/485 Serial Device Server (DB9)
QSE-400M 4 port RS-232/422/485 Serial Device Server (RJ45)
ESE-400D 8 port RS-232/422/485 Serial Device Server (DB9)
ESE-400M 8 port RS-232/422/485 Serial Device Server (RJ45)


Model No. Discripctions
SDS-RJ45-10 DB-9 to 10-pin RJ-45 adapter, (RS-232)
DB9F-STA Adapter, DB9F to screw terminal
SS1 Surge suppression package for 1 port
SS2 Surge suppression package for 2 ports
SS4 Surge suppression package for 4 ports
SS8 Surge suppression package for 8 ports
SDS-DIN-01 Din Rail Mounting Kit for SSE/DSE-100/400D
DS-RACK-BLK Rack Mount Kit for QSE/ESE models-Black
TERM-422-D9F Terminator pack f or RS-422 (-400 models)
TERM-485-D9F Terminator pack for RS-485 (-400 models)