Antaira STM-501C Modbus TCP to Serial RTU/ASCII Gateway

Antaira STM-501C Modbus TCP to Serial RTU/ASCII Gateway
Model: STM-501C
Availability: IN STOCK
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Modbus TCP to Serial RTU/ASCII Gateway

The STM-501C, MODBUS gateway allows the legacy MODBUS RTU/ASCII devices to operate on a MODBUS TCP network. It allows either MODBUS serial master or slave to communicate with MODBUS TCP's slave or master.
Modbus TCP masters to Modbus RTU/ASCII slaves:The STM-501C allows multiple MODBUS TCP masters to communicate with a MODBUS serial network. Since a MODBUS serial network can only handle one query at one time, queries from different masters are pipelined and processed one by one.
Modbus RTU/ASCII master to Modbus TCP slaves: When the STM-501C functions as the MODBUS RTU/ASCII master to MODBUS TCP slave gateway, the STM-501C can connect up to 8 MODBUS TCP slaves. Users can specify a UID range for each MODBUS TCP slave.
Inactive timeout: The STM-501C provides an inactive timeout that allows users to specify a time period to disconnect TCP/IP connection if there is no activity in the network. If the connection does not tear down it would occupy one connection slot and prevent any another connection again.
Configuration tools: User friendly management software provides an easy way to configure the STM-501C. It can search all serial device servers within a local area network independent of its subnet. It can also find a serial device server of a specific IP address over a wide area network. The STM-501C can also be configured by its console port or through telnet connection. The STM-501C provides a web interface for the user to configure it with a web browser.

  • DIN-Rail or Panel Mount
  • Supports 10/100 Mbps Ethernet
  • Supports RS-232, RS-422, and RS-485 Serial Interface
  • Supports LAN and WAN Communications
  • Management Access Password Protected
  • Supports up to 8 MODBUS TCP Master to MODBUS RTU/ASCII
  • Supports Inactive Timeout
  • Supports Loop Back Mode

Included Items

  • STM-501C
  • CD Manual/Software
  • Terminal Blocks



TypeModbus TCP to Serial
Ethernet Ports1 x 10/100TX
StandardsIEEE 802.3 10BASE-T / IEEE 802.3u 100BASE-TX
FunctionalityVirtual COM, TCP/UDP
ProtocolTCP, IP, ARP, DHCP, Telnet, HTTP, UDP, ICMP
Industrial ProtocolModbus Parameters: Up to 1 TCP Master, 8 TCP Slaves
Watchdog Timer60-Second Software Auto-Reset(Customization) ; 1 Second Real-Time Clock Built-In
Serial Interface
Serial Ports1 x RS-232/422/485
Baud Rate110 bps~230.4 Kbps
Network Management
System ConfigurationSerial Console, Telnet, Web and Windows-Based Utility
Input Voltage7 to 30 VDC
Power Consumption3.5W
Connection2-Pin Terminal Block or Power Jack
EnclosureMetal, IP30 Protection
Dimensions85 x 115 x 23 mm
Weight0.4 lbs
MountingDIN-Rail or Wall Mounting
Operating Temperature0 to 50°C
Storage Temperature-20 to 60°C
Humidity0 to 90% non-condensing
RoHS CompliantYes
CertificationsCE, FCC
Warranty5 Years
Download NameFile Size
STM-501C Datasheet1.06MB
STM-501C User manual1019.16KB
Tags: STM-501C