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.
|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
|Operating Temperature||0 to 50 °C (32 to 122 °F)|
|Storage Temperature||-20 to 60 °C (-4 to 140 °F)|
|Humidity||0 to 90% Non-Condensing|
|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 â€“, GND
|Parity||none, even, odd, mark, space|