DeviceMaster ® UP 4-Port Modbus

The DeviceMaster UP 4-Port Modbus industrial Ethernet gateway has a wide operating temperature and Modbus/TCP support

Part Number: 99521-0

PortVision DXweb


  • DIN-rail mounting and screw terminal power connections
  • Highly flexible and unique Modbus functionality
  • Multiple Modbus master and slave types
  • Raw/ASCII Serial and Ethernet device support
  • Variable power input eliminates need for power converters
  • Dual Ethernet ports for daisy chaining network connections between multiple units
  • RoHS 2 compliant under CE

Comtrol has developed three unique Modbus firmware applications that provide a wide range of Modbus connectivity. Simple connections or complex Modbus networks, you can do it all with a DeviceMaster UP.


The DeviceMaster UP has been designed to meet the demands of today’s increasingly diverse Modbus installations.

Highly flexible and robust, the DeviceMaster UP provides connectivity between a vast array of Modbus controllers and devices. Simplified configuration pages, innovative functionality and informative diagnostic information all make for quick and easy set-up of even the most complex Modbus installations.

View the DeviceMaster UP Modbus Solutions

View Engineering Drawing

  • DeviceMaster UP 4-Port Modbus
  • Power Cord, Euro Power Cord
  • Loopback plugs - DB9, RJ45
  • Bumper
  • Brackets (2)
  • Power Supply
  • RJ45-DB9 Adapter (4)
  • Screws (4)
  • Serial Connectors (4) DB9 Male
  • Ethernet Ports (2) 10/100 BaseT
  • Processor ARM7 44Mhz
  • Memory
    • RAM 8MB
    • Flash 4MB
  • Mounting Options Panel/Rack
  • LED Indicators Status, Ethernet Link/Activity, Collision, 100MB Ethernet, RX/TX per Port
  • Housing Rugged Steel Construction
Electrical Specifications
  • Device Requirements 5 to 30 VDC
  • Device Consumption 2.5 Watts
  • External Power Supply (Included)
    • Input 90 to 260 VAC @ 47-63Hz
    • Output 500mA @ 24 VDC
  • Surge Protection 15KV
Environmental Specifications
  • Operating Temperature -37° to 74° C
  • Storage Temperature -40° to 85° C
  • Humidity (non-condensing)
    • System On 20% to 80%
    • System Off 8% to 80%
  • Altitude 0 to 10000 Feet
  • Heat Output 8.5 BTU/Hr
  • MTBF (Mean Time Between Failures) 25.0 Years

Serial Communications

  • Software Selectable RS-232/422/485
  • Baud Rate 50 bps to 230 Kbps
    • Data Bits 7 or 8
    • Parity odd, even, or none
    • Stop Bits 1 or 2
  • Communication ModesModbus/TCP to Serial or Ethernet TCP/IP
    Modbus/TCP to Modbus/RTU
    Modbus/TCP to raw serial data
    Modbus/RTU Device (Auto Locate and Auto Route)
  • Network Protocols Telnet, HTTP, SNMP, DHCP, ARP, BOOTP, Ping

Regulatory Approval Marks

CE Mark, FCC Part 15 Subpart B Class A, CTick, CUL, ODVA Certified, PIC Certified, RoHS Certified

Regulatory Approvals
  • Emissions EN55022 & A1:2000 IEC 100032
    IEC 100033
  • Immunity EN55024
    IEC 100042
    IEC 100043
    IEC 100044
    IEC 100045
    IEC 100046
    IEC 100048
    IEC 1000411
  • Safety EN60950
    IEC 60950
    CSA C22.2 No. 50/UL60950
  • Other Regulatory Approvals European Standard: RoHS 2 Compliant under CE
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 ® UP 4-Port Modbus User GuideContains detailed installation procedures and configuration information.
Product Support and Service Information
Sales Support

Call +1.763.494.4100, or e-mail

Technical Support

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

Call +1.763.494.4100, or visit our forum at


Comtrol offers a 30-Day satisfaction guarantee and a 5-year limited warranty on all DeviceMaster products! Extended Warranty Available.

Software & Drivers
» Comtrol FTP Site