Industrial Gateway
Modbus has become a standard industrial communication protocol, and is now the most commonly available means of connecting industrial electronic devices. Modbus allows for communication between many devices connected to the same RS-485 network, for example, a system that measures temperature and humidity and communicates the results to a computer. Modbus is often used to connect a supervisory computer with a remote terminal unit (RTU) in supervisory control and data acquisition (SCADA) systems.
The tGW-700 is a Modbus TCP to RTU/ASCII gateway that enables a Modbus/TCP host to communicate with serial Modbus RTU/ASCII devices through an Ethernet network, and eliminates the cable length limitation of legacy serial communication devices. The module can be used to create a pair-connection application (as well as serial-bridge or serial-tunnel application), and can then route data over TCP/IP between two serial Modbus RTU/ASCII devices, which is useful when connecting mainframe computers, servers or other serial devices that use Modbus RTU/ASCII protocols and do not themselves have Ethernet capability.
The read-cache function is used to store previous requests and responses in the memory buffer of the tGW-700 module. When other HMI/SCADA master controllers send the same requests to the same RTU slave device, the cached response is returned immediately. This feature dramatically reduces the loading on the RS-485 bus communication, ensures faster TCP responses, and improves the stability of the entire system.
The tGW-700(Non-T) module offers true IEEE 802.3af-compliant (classification, Class 1) Power over Ethernet (PoE) functionality using a standard category 5 Ethernet cable to receive power from a PoE switch such as the NS-205PSE. If there is no PoE switch on site, the module will also accept power input from a DC adapter. The tGW-700 module is designed for ultra-low power consumption, reducing hidden costs from increasing fuel and electricity prices, especially when you have a large number of modules installed. Reducing the amount of electricity consumed by choosing energy-efficient equipment can have a positive impact on maintaining a green environment.
CPU Module | |
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CPU | 32-bit ARM |
COM Ports | |
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Ports | 2 x RS-485 |
Baud Rate | 115200 bps Max. |
Bias Resistor | Yes, 1 KΩ |
Parity | None, Odd, Even, Mark, Space |
Data Bit | 5, 6, 7, 8 |
Stop Bit | 1, 2 |
Node Address | 254 (max.) |
Ethernet | |
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Ports | 10/100 Base-TX, 8-pin RJ-45 x 1, (Auto-negotiating, Auto-MDI/MDIX, LED indicator) PoE (IEEE 802.3af, Class 1) |
Power | |
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Consumption | 0.07 A @ 24 VDC |
Powered from PoE | I EEE 802.3af, Class 1 |
Powered from Terminal Block | +12 ~ 48 VDC |
Mechanical | |
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Casing | Plastic |
Dimensions (mm) | 52 mm x 95 mm x 27 mm (W x H x D) |
Installation | DIN-Rail Mounting |
Environment | |
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Operating Temperature | -25 ~ +75 °C |
Storage Temperature | -30 ~ +80 °C |
Humidity | 10 ~ 90% RH, Non-condensing |
CA-002 | ES25A48-DA1-DIN | GST25A24-DA1-DIN | NS-205PSE |
PRODUCT SERIES | DESCRIPTION | QTY | INQUIRY |
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tGW-725 CR | Tiny Modbus/TCP to RTU/ASCII Gateway with PoE and 2-port RS-485 (RoHS) Includes DC-jack to 2-wire power cable, 0.3 M |
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