antaira - ates group


Industrial serial connectivity

16-Port RS-232/422/485 To Ethernet Device Server

Datasheet   Get a quote

SKU: 16-Port RS-232/422/485 To Ethernet Device Server Category:


  • 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

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.

Serial Buffer Output: 64K bytes
Input: 8K bytes per port
Management Manager software, Serial Console, Telnet, Web server Firmware upgradeable
Dimensions 3.35 x 4.5 x 0.90 in (8.5 x 11.5 x 2.3 cm)
Power Requirements 7 ~ 30 VDC
500 mA
Operating Temperature 0 to 50 °C (32 to 122 °F)
Storage Temperature -20 to 60 °C (-4 to 140 °F)
Humidity 0 – 90% Non-Condensing
Approvals CE, FCC
Warranty 5-year Warranty
LAN 10/100 Mbps Auto-detecting – 10 Base T, 100 Base TX
Data Rate 110 bps to 230.4 kbps
Data Bits 5, 6, 7 or 8
Stop Bits 1, 1.5 or 2
Protocols TCP, IP, ARP, DHCP, Telnet, HTTP, UDP, ICMP
Serial Connection DTE – DB-9 Male
Serial Interface RS-232: TX, RX, RTS, CTS, DTR, DSR, DCD, GND
RS-422: TX+, TX-, RX+, RX-, RTS+, RTS-, CTS+, CTS-, GND
RS-485: Data +, Data –, GND
Parity none, even, odd, mark, space