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Diamond Point International

Quatech Serial Servers - Ethernet to Serial Converters

1, 2 4 or 8 port RS-232/422/485 to Ethernet Device Server


Quatech's high performance RS-232 serial 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.

Quatech RS-232 serial servers network-enable your serial devices for remote communication, monitoring and control.
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 RS-232 serial 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 Selectable 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.

Note that Quatech were acquired by B&B Electronics in 2011.



InterfaceRS-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)
• SSE: 1 port
• DSE: 2 ports
• QSE: 4 ports
• ESE: 8 ports
• SSE: 16C550 with 16-byte FIFO
• DSE/QSE/ESE: 16C750 with 64-byte FIFO
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
RS-232RS-232 Receiver Inputs:
• Input Voltage Rating: -15V to +15V
• Receiver Skew: 120 ns (typical), 250 ns (maximum)

RS-232 Transmitter Outputs:
• High Level Output: +5V (minimum), +5.4V (typical)
• Low Level Output: -5V (minimum), -5.4V (typical)
• Transmitter Skew: 50 ns (typical), 200 ns (maximum)
RS-422/485RS-422/485 Receiver Inputs:
• Input Voltage Rating: -15V to +15V Common Mode Input Voltage
• Receiver Skew: 13 ns (typical)

RS-422/485 Transmitter Outputs:
• Transmitter Outputs: 2V min for 100 Ohm load
• Transmitter Skew: 5 ns (typical), 10 ns (maximum)
• Distance: 4000 feet
Data Rates921.6 kbps max per port
OtherLAN Interface: 10/100 BaseT (IEEE 802.3), auto-negotiation. RJ-45 Network connector. Auto MDI/MDIX and RJ-45 Ethernet connector

• 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

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
Connector(s)LAN connector: RJ45 - 8 pin
Serial connector: Standard DB-9 male


Electrical+5V, 2A (10 W) max DC, with auto-sensing AC adapter provided for 100VAC-240VAC, 50Hz-60Hz worldwide operation
• 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)
SoftwareWindows NT4/2000/XP/Vista/7. Raw TCP, Raw UDP, Tunneling, AutoTCP and and IntelliSock™ modes are OS independent.
TemperatureTemperature range (operation): 0 to +70°C
Safety/CertificationCE, FCC Class B, RoHS and WEEE compliant
Warranty1 Year

Ordering Details

BoardSSE-100D 1 port RS-232 Serial Device Server (DB9)
DSE-100D 2 port RS-232 Serial Device Server (DB9)
QSE-100D 4 port RS-232 Serial Device Server (DB9)
ESE-100D 8 port RS-232 Serial Device Server (DB9)
ESE-400D 8 port RS-232/422/485 Serial Device Server (DB9)
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