Chapter 1: Getting Started
Page 1–3
S
tride
®
MB Gateway User Manual
–
1st Edition Rev. E – August 2020
Introduction
Modbus is one of the most popular communication protocols in the automation industry because
it supports both traditional RS-232/422/485 devices and industrial Ethernet devices. Many
industrial devices, such as PLCs, HMIs, instruments and meters use Modbus as their standard
communication protocol. However, the Modbus protocols running over serial and Ethernet are so
different that a communication gateway is needed as a bridge for integrating devices from these
two networks. The
STRIDE
® Modbus Gateway provides that bridge between Modbus RTU (Serial)
products and Modbus TCP (Ethernet) products.
The gateway converts bidirectionally between Modbus RTU or Modbus ASCII protocols and
Modbus TCP. In addition to its compact size, the gateway features up to two 10/100 Mbps Ethernet
ports and up to four RS232/422/485 serial ports.
SECURITY NOTE: When implementing any method of remote access to your equipment, you
need to consider the security exposure in order to minimize the risks to your processes and
your equipment. Security should always be carefully evaluated for each installation. Refer to
“Appendix D: Security Considerations for Control Systems Networks” for more information.
.
Product Overview
Key features include:
9
Industrial 1, 2, or 4 serial port, and 1 or 2 Ethernet port Modbus Gateways
(Modbus RTU/ASCII <-> ModbusTCP)
9
Automatic read function “Agent Mode”
9
Ethernet ports each support up to 16 TCP devices, client or server
9
Serial ports each support up to 128 slave devices or 1 master device
9
DIP switch selectable termination resistor for RS-485 mode
9
High Serial Isolation Voltage (2kV)
9
UL61010 with Class 1 Division 2 hazardous location rating
9
Metal housing with wide temperature rating (−40 to +75°C)
Hardware
STRIDE
Modbus Gateway Models
Part Number
Ethernet Ports
RJ45, 10/100Mbps
Serial Ports
D-sub 9 pin
SGW-MB1511-T
1
1
SGW-MB1512-T
1
2
SGW-MB1524-T
2
4
Ethernet Interface
Port
Shielded RJ45
Speed
10/100 Mbps
Protection
Built-in 1�5 kV magnetic isolation
Protocol Supported
Modbus TCP/IP client and server
Modbus TCP devices supported
16 simultaneous Modbus TCP connections per Ethernet port
Cable Type
Autodetects Ethernet cable types (MDI/MDIX)
Default IP address
192�168�0�249
192�168�1�249 (Ethernet Port 2, SGW-MB1524-T)
