DeviceMaster ® RTS 1-Port DB9

This DeviceMaster RTS 1-Port DB9 Ethernet device server has no serial cable distance limitations and is temperature rated to operate under extreme industrial conditions

Part Number: 99435-0

Part Number: 99437-4 (w/ Euro Power Supply)

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The Comtrol DeviceMaster RTS 1-Port is a single-port device server designed for network-enabling serial communications devices. When used with the included NS-Link™ driver software and a host PC, the DeviceMaster RTS enables placement of COM or TTY ports anywhere on an Ethernet network or across the Internet. In applications where connecting legacy serial devices to a PC without software changes is a requirement, a pair of DeviceMaster RTS units can be used to create a point-to-point serial tunnel across the network that seamlessly transfer serial data via TCP or UDP socket connections. This product is RoHS 2 Compliant under CE.

View Engineering Drawing

  • DeviceMaster RTS 1-Port Device
  • Power Supply
  • Loopback Plug
  • 35mm DIN rail clips & Screws
  • Bus Interface Specification 10/100 BASE-T
  • Memory
    • SDRAM 8 MB
    • Flash 4 MB
  • Installation Method Panel Mountable or DIN Rail
  • LED Indicators 100MB Ethernet, Duplex, Ethernet Link/Activity, and Status
  • Dimensions 3.6" x 0.8" x 2.8"
    41.4 x 20.3 x 71.1 mm
  • Product Weight 7.8 oz
    221.13 g
Electrical Specifications
  • Device Requirements 200mA @5 VDC
  • Device Consumption 2.1 Watts
  • External Power Supply
    • Input 90 to 132 VAC @ 60Hz
    • Output420mA @ 5 VDC
  • ESD Surge Protection Provides minimum of 15KV protection for all serial lines. All Ethernet components are rated to 1.5KV magnetic surge protection.
Environmental Specifications
  • Air temperature
    • System On -37 to 74° C
    • System Off -40 to 85° C
  • Operating Humidity (non-condensing) 5% to 95%
  • Altitude 0 to 10,000 Feet
    3,048 m
  • Heat Output 7.2 BTU/Hr
  • MTBF (Mean Time Between Failures)48.4 Years

Serial Communications

  • Connector Type DB9M
  • Number of Ports 1
  • Software Selectable Interfaces RS-232
  • Baud Rate 300 bps to 230.4 kbps
    • Receive Buffer 1024bytes
    • Transmit Buffer 256bytes
  • Device Driver Data Control
    • Data Bits 7 or 8
    • Parity odd, even, or none
    • Stop Bits 1 or 2
    • Flow Control Hardware, Software, or None
Ethernet Specifications
  • Network ProtocolsARP, BOOTP, DHCP/RARP/Ping, HTTP, ICMP, RFC 1006 (ISO over TCP), SNMP (MIB-II), TCP/IP & UDP socket services, Telnet, TFTP, and supports IP multicast data transmission
  • Connector Type RJ45F Auto MDI/MDI-X
  • Number of Ports 1


  • SNMP Support Monitoring only.
  • OtherEvent notification, Lowest latency, NS-Link COM/TTY port redirector, PortVision remote management, and Watchdog reset
  • Manufacturer's Warranty 5 Years
Export Information
  • Packaged Shipping Weight1.97lbs
    0.89 kg
  • Package Dimensions9.18" x 2.5" x 7.25"
    233.2 x 63.5 x 184.2 mm
  • UPC Code7-56727-99435-0
  • Country of OriginUSA
  • ECCN5A992
  • Schedule B Number8471.80.1000

Device Drivers

Regulatory Approvals
  • Emissions Canadian EMC requirements
    European Standard EN55022 FCC Part 15 Subpart B Class A limit
  • Immunity European Standard EN55024
    IEC 1000-4-2/EN61000-4-2: ESD
    IEC 1000-4-3/EN61000-4-3: RF
    IEC 1000-4-4/EN61000-4-4: Fast Transient
    IEC 1000-4-5/EN61000-4-5: Surge
    IEC 1000-4-6/EN61000-4-6: Conducted Disturbance
    IEC 1000-4-8/EN61000-4-8: Magnetic Field
    IEC 1000-4-11/EN61000-4-11: Dips and Voltage Variations
  • Safety IEC 60950/EN60950
    CSA C22.2 No. 60950/UL60950 Third Edition
  • Other Regulatory Approvals

  • Pinout Diagram

Find a Distributor

» Industrial Distributors
» North American Distributors
» International Distributors

Pre-Sales Questions

Comtrol's Pre-sales Team
For sales questions or to locate a reseller near you.

+1-800-926-6876 (1-800-Go Rocket)
Fax: +1-763-957-6001

Comtrol's Industrial Automation Sales
For sales questions or to locate an industrial distributor near you.

+1-800-926-6876 (1-800-Go Rocket)
Fax: +1-763-957-6001

DocumentDescriptionDownload File
DeviceMaster ® RTS 1-Port DB9 User GuideContains detailed installation procedures and configuration information.
Product Support and Service Information

Part Number: 99435-0

Sales Support

Call +1.763.957.6000, or e-mail

Technical Support

For technical assistance, our U.S.-based technical support team is only a phone call away.

Call +1.763.957.6000, or visit our forum .


Comtrol offers a 30-Day satisfaction guarantee and a 5-year limited warranty on all DeviceMaster RTS family products!

View Warranty

Extended Warranty Available

Software & Drivers
» Comtrol FTP Site