antaira STM-501C 1-Port MODBUS TCP to RTU-ASCII Gateway Instructions

: June 12, 2024
: antaira

Table of Contents

Features
Specifications
Pin Assignments
Ordering Information
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Devolinx STM-501C
1-Port MODBUS TCP to RTU/ASCII Gateway

Features

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

Specifications

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: STM-501C allows multiple MODBUS TCP masters to communicate with a MODBUS serial network. Since 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 STM-501C function as MODBUS RTU/ASCII master to MODBUS TCP slave gateway, STM-501C can connect up to 8 MODBUS TCP slave. User can specify a UID range for each MODBUS TCP slace.
Inactive timeout: STM-501C provides inactive timeout that allows user to specify a time period to disconnect TCP/IP connection if there is no activity in the network. It could be the peer of the connection is down 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 conﬁ gure STM-501C. It can search all serial device servers within a local area network independent of its subnet. It can also ﬁ nd a serial device servers of a speciﬁ c IP address over wide area network. STM-501C can also be conﬁ gured by its console port or through telnet connection. STM-501C also provides web interface for user to conﬁ gure it by a web browser.

Serial Buffer
Output: 64K bytes
Input: 8K bytes per port
Serial Connection
DTE – BD-9 male
LAN
10/100 Mbps Auto-detecting – 10 Base T, 100 Base TX
Serial Interfaces
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
Data Rate
110 bps to 230.4 k bps
Parity
none, even, odd, mark, space
Data Bits
5, 6, 7 or 8
Stop Bits
1, 1.5 or 2
Protocol
TCP, IP, ARP, DHCP, Telnet, HTTP, UDP, ICMP
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

Pin Assignments

DB-9 Pin

1

| RS-232| RS-422| RS-485
---|---|---|---
DCD| RX-| –
2| RXD| RX+| –
3| TXD| TX+| DATA+
4| DTR| TX-| DATA-
5| GND| GND| –
6| DSR| CTS-| –
7| RTS| CTS+| –
8| CTS| RTS+| –
9| RI| RTS-| –

Ordering Information

STM-501C 1-Port MODBUS TCP to RTU/ASCII Gateway
POWER ADAPTER SOLD SEPARATELY
Optional Accessories

PA-FCS-US
PA-FCS-UK
PA-FCS-EU
DIN-RAIL-KIT| Power Adapter For FCS/STM, 12V 0.8A, 100-240V (US Plug)
Power Adapter For FCS/STM, 12V 0.8A, 100-240V (UK Plug)
Power Adapter For FCS/STM, 12V 0.8A, 100-240V (Euro Plug)
DIN Rail Mounting Kit
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Antaira Technologies
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Phone: 714-671-9000
FAX: 714-671-9944
e-Mail: info@antaira.com
Website: http://www.antaira.com www.antaira.com