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- Dual Serial Interfaces: Two RS422/RS485 ports with 5-contact terminal blocks, supporting both 4-wire RS422 and 2-wire RS485 configurations.
- Ethernet Connectivity: One 10/100BASE-TX RJ45 port compliant with IEEE 802.3/802.3u standards, supporting auto-negotiation and auto-MDI/MDI-X.
- Protocol Conversion: Acts as a transparent bridge between Modbus TCP/IP and Modbus RTU/ASCII protocols, supporting RTU Master/Slave and ASCII Master/Slave modes.
- Flexible Operation Modes:
- Master mode supports up to 32 slave TCP connection requests.
- Slave mode supports up to 16 TCP master connections.
- High Data Rate: Configurable baud rate from 300 bps to 115,200 bps with non-blocking communication.
- Industrial-Grade Design: IP40-rated metal housing, wall-mountable, with 1 kV surge protection on serial lines.
- Wide Power Input Range: 9–48 VDC via 2-contact terminal block, with low power consumption (~1.25 W @ 9 VDC).
- Comprehensive Management:
- Web-based GUI and Telnet management interfaces.
- PLANET Modbus Gateway Utility and Smart Discovery Utility for device discovery, configuration, and firmware management.
- Security and Access Control: IP/MAC filtering, user authentication, and configurable access permissions.
- Environmental Resilience: Operates reliably in extreme industrial conditions (-40°C to +75°C, 5–95% RH non-condensing).
- Compliance: Meets FCC Part 15 Class B, CE, and IEC60068-2-32/27/6 standards for free fall, shock, and vibration.
- Ethernet Connectivity: One 10/100BASE-TX RJ45 port compliant with IEEE 802.3/802.3u standards, supporting auto-negotiation and auto-MDI/MDI-X.
- Protocol Conversion: Acts as a transparent bridge between Modbus TCP/IP and Modbus RTU/ASCII protocols, supporting RTU Master/Slave and ASCII Master/Slave modes.
- Flexible Operation Modes:
- Master mode supports up to 32 slave TCP connection requests.
- Slave mode supports up to 16 TCP master connections.
- High Data Rate: Configurable baud rate from 300 bps to 115,200 bps with non-blocking communication.
- Industrial-Grade Design: IP40-rated metal housing, wall-mountable, with 1 kV surge protection on serial lines.
- Wide Power Input Range: 9–48 VDC via 2-contact terminal block, with low power consumption (~1.25 W @ 9 VDC).
- Comprehensive Management:
- Web-based GUI and Telnet management interfaces.
- PLANET Modbus Gateway Utility and Smart Discovery Utility for device discovery, configuration, and firmware management.
- Security and Access Control: IP/MAC filtering, user authentication, and configurable access permissions.
- Environmental Resilience: Operates reliably in extreme industrial conditions (-40°C to +75°C, 5–95% RH non-condensing).
- Compliance: Meets FCC Part 15 Class B, CE, and IEC60068-2-32/27/6 standards for free fall, shock, and vibration.
1. Product Overview
Product Name: Industrial 2-Port RS422/485 Modbus Gateway
Model: IMG-120T
Series: Industrial Modbus Gateway Series
Article Number: IMG-120T
Manufacturer: PLANET Technology Corporation
The PLANET IMG-120T is an industrial-grade, isolated dual-port Modbus/Serial-to-Ethernet gateway designed to bridge Modbus TCP/IP networks with Modbus RTU/ASCII serial devices. It provides two independent RS422/RS485 serial interfaces and one 10/100BASE-TX Ethernet port, enabling seamless communication between legacy serial equipment and modern Ethernet-based control systems. The device is engineered for harsh industrial environments, featuring a rugged IP40-rated metal enclosure, wide operating temperature range (-40°C to +75°C), and robust surge protection.
2. Key Features
- Dual Serial Interfaces: Two RS422/RS485 ports with 5-contact terminal blocks, supporting both 4-wire RS422 and 2-wire RS485 configurations.
- Ethernet Connectivity: One 10/100BASE-TX RJ45 port compliant with IEEE 802.3/802.3u standards, supporting auto-negotiation and auto-MDI/MDI-X.
- Protocol Conversion: Acts as a transparent bridge between Modbus TCP/IP and Modbus RTU/ASCII protocols, supporting RTU Master/Slave and ASCII Master/Slave modes.
- Flexible Operation Modes:
- Master mode supports up to 32 slave TCP connection requests.
- Slave mode supports up to 16 TCP master connections.
- High Data Rate: Configurable baud rate from 300 bps to 115,200 bps with non-blocking communication.
- Industrial-Grade Design: IP40-rated metal housing, wall-mountable, with 1 kV surge protection on serial lines.
- Wide Power Input Range: 9–48 VDC via 2-contact terminal block, with low power consumption (~1.25 W @ 9 VDC).
- Comprehensive Management:
- Web-based GUI and Telnet management interfaces.
- PLANET Modbus Gateway Utility and Smart Discovery Utility for device discovery, configuration, and firmware management.
- Security and Access Control: IP/MAC filtering, user authentication, and configurable access permissions.
- Environmental Resilience: Operates reliably in extreme industrial conditions (-40°C to +75°C, 5–95% RH non-condensing).
- Compliance: Meets FCC Part 15 Class B, CE, and IEC60068-2-32/27/6 standards for free fall, shock, and vibration.
3. Technical Specifications
Physical Characteristics
- Dimensions (W × D × H): 69 × 100 × 22 mm
- Weight: 238 g
- Enclosure: IP40-rated metal housing
- Mounting: Wall-mount kit included
Power
- Input Voltage: 9–48 VDC via 2-contact terminal block
- Power Consumption: Approx. 1.25 W @ 9 VDC (max. 1.6 W)
- Polarity: V+ (positive), V– (negative)
Serial Interface
- Ports: 2 × RS422/RS485
- Connector: 10-contact terminal block (5 contacts per port)
- Supported Modes: RS422 (4-wire), RS485 (2-wire)
- Signals:
- RS422: Tx+, Tx–, GND, Rx+, Rx–
- RS485: Data A(+), GND, Data B(–)
- Baud Rate: 300 bps to 115,200 bps
- Data Bits: 7 or 8
- Parity: Odd, Even, None, Space, Mark
- Stop Bits: 1 or 2
- Flow Control: Hardware (RTS/CTS, DTR/DSR) or None
- Surge Protection: 1 kV
- Transmission Distance: Up to 20 m (RS422/RS485)
Ethernet Interface
- Port: 1 × 10/100BASE-TX RJ45
- Standards: IEEE 802.3, IEEE 802.3u, IEEE 802.3x
- Distance: Up to 100 m (Cat5e or better cable)
- Auto Features: Auto-negotiation, Auto-MDI/MDI-X
Environmental Conditions
- Operating Temperature: -40°C to +75°C
- Storage Temperature: -40°C to +75°C
- Operating Humidity: 5–95% RH (non-condensing)
- Storage Humidity: 5–95% RH (non-condensing)
4. Functionality
The IMG-120T functions as a protocol conversion gateway between Modbus TCP/IP and Modbus RTU/ASCII networks. It enables Ethernet-based SCADA, HMI, or DCS systems to communicate with serial Modbus devices such as PLCs, sensors, and controllers.
Supported Modes:
- Modbus Gateway Modes: RTU Master, RTU Slave, ASCII Master, ASCII Slave
- Serial-Ethernet Modes: TCP Server, TCP Client
Use Cases:
- Integrating legacy Modbus RTU/ASCII devices into modern Ethernet-based control systems.
- Bridging multiple Modbus TCP/IP masters to serial slave devices.
- Connecting SCADA/HMI systems to distributed field devices over Ethernet.
- Industrial automation, building management, energy monitoring, and process control.
Compatibility:
- Works with standard Modbus TCP/IP, RTU, and ASCII protocols.
- Compatible with PLANET’s ICS and IMG series converters and gateways.
5. Components & Accessories
Included Items:
- 1 × IMG-120T Industrial Modbus Gateway
- 1 × Quick Installation Guide
- 1 × User’s Manual CD
Optional Accessories:
- PLANET PWR-40-24 / PWR-60-24 / PWR-75-24 DC power supplies
- Related models: IMG-110T (1-port version), ICS-100/ICS-2100 media converters
Connectors:
- Power: 2-contact terminal block (V+, V–)
- Serial: 2 × 5-contact terminal blocks
- Ethernet: 1 × RJ45 port
Indicators:
- System Power: Green LED
- Ethernet Link/Activity: Green LED
- Serial TX/RX: Green LEDs (TX1/TX2, RX1/RX2)
DIP Switch:
- 4-bit DIP switch for hardware reset to factory defaults
6. Installation & Setup
Requirements:
- PC with Ethernet NIC and web browser (IE 8.0+, Chrome, Firefox, Safari)
- Standard UTP cable (Cat5e or higher)
- DC power source (9–48 VDC)
Mounting Options:
- Wall-mount installation using included kit
- DIN-rail mounting (optional accessory)
Configuration Methods:
- Web Interface: Accessible via default IP 192.168.0.100 (username/password: admin/admin)
- Telnet Interface: Command-line configuration via IP-based Telnet session
- PLANET Utilities:
- *Smart Discovery Utility* for device detection and IP configuration
- *Modbus Gateway Utility* for batch configuration, firmware updates, and monitoring
Reset Procedure:
- Set DIP switch 2 to “ON” and power cycle the device to restore factory defaults.
7. Performance & Capabilities
- Data Throughput: Non-blocking communication on both serial ports
- Baud Rate Range: 300 bps to 115,200 bps
- TCP Connections:
- Master mode: up to 32 slave TCP connections
- Slave mode: up to 16 TCP master connections
- Response Timeout: 10–120,000 ms configurable
- Inter-character Timeout: 0–500 ms
- Inter-frame Delay: 0–500 ms
- Reliability: High immunity to EMI and electrical surges
- Power Efficiency: Low power draw (~1.25 W typical)
- Limitations: Serial cable length limited to 20 m; no standby power mode
8. Standards & Compliance
Network Standards:
- IEEE 802.3 (10BASE-T)
- IEEE 802.3u (100BASE-TX)
- IEEE 802.3x (Full-duplex flow control)
- EIA/TIA RS422/RS485
Regulatory Compliance:
- FCC Part 15 Class B
- CE Mark (EMC Directive)
Environmental & Mechanical Testing:
- IEC60068-2-32 (Free fall)
- IEC60068-2-27 (Shock)
- IEC60068-2-6 (Vibration)
Safety & Environmental Notes:
- WEEE compliant (proper electronic waste disposal)
- No standby mode; disconnect power when not in use to save energy
9. Additional Information
Warranty & Support:
- Manufacturer warranty provided by PLANET Technology Corp.
- Technical support available via PLANET’s global service network.
Maintenance:
- Periodic firmware updates via web interface or utility software.
- Configuration backup and restore supported through HTTP interface.
- LED indicators and web diagnostics for real-time status monitoring.
Firmware & Software Updates:
- Firmware upgradeable via web browser (HTTP upload).
- Configuration files can be downloaded/uploaded for backup or replication.
Security Features:
- User authentication (up to 3 user accounts).
- IP and MAC address filtering for access control.
- Configurable device security (enable/disable web, Telnet, firmware upgrade).
Energy Efficiency:
- Power consumption <1.6 W.
- Recommended to disconnect power when idle for energy savings.
Ordering Information:
- Model: IMG-120T – Industrial 2-Port RS422/485 Modbus Gateway
- Related Models:
- IMG-110T – 1-Port RS422/485 Modbus Gateway
- ICS-100 / ICS-2100 – RS232/RS422/RS485 over Ethernet Media Converters
Summary
The PLANET IMG-120T is a compact, high-reliability industrial Modbus gateway engineered for seamless integration between Ethernet-based Modbus TCP/IP networks and serial Modbus RTU/ASCII devices. With dual isolated RS422/485 ports, robust protocol conversion capabilities, and comprehensive management interfaces, it provides a cost-effective and scalable solution for industrial automation, SCADA, and process control systems. Its rugged IP40 metal housing, wide temperature tolerance, and compliance with industrial standards ensure dependable operation in demanding environments.
The device’s flexible configuration options—via web, Telnet, or PLANET utilities—simplify deployment and maintenance, while its advanced access control and monitoring features enhance network security and operational visibility. The IMG-120T exemplifies PLANET’s commitment to industrial connectivity, offering a reliable bridge between legacy serial systems and modern Ethernet infrastructures.
Product Name: Industrial 2-Port RS422/485 Modbus Gateway
Model: IMG-120T
Series: Industrial Modbus Gateway Series
Article Number: IMG-120T
Manufacturer: PLANET Technology Corporation
The PLANET IMG-120T is an industrial-grade, isolated dual-port Modbus/Serial-to-Ethernet gateway designed to bridge Modbus TCP/IP networks with Modbus RTU/ASCII serial devices. It provides two independent RS422/RS485 serial interfaces and one 10/100BASE-TX Ethernet port, enabling seamless communication between legacy serial equipment and modern Ethernet-based control systems. The device is engineered for harsh industrial environments, featuring a rugged IP40-rated metal enclosure, wide operating temperature range (-40°C to +75°C), and robust surge protection.
2. Key Features
- Dual Serial Interfaces: Two RS422/RS485 ports with 5-contact terminal blocks, supporting both 4-wire RS422 and 2-wire RS485 configurations.
- Ethernet Connectivity: One 10/100BASE-TX RJ45 port compliant with IEEE 802.3/802.3u standards, supporting auto-negotiation and auto-MDI/MDI-X.
- Protocol Conversion: Acts as a transparent bridge between Modbus TCP/IP and Modbus RTU/ASCII protocols, supporting RTU Master/Slave and ASCII Master/Slave modes.
- Flexible Operation Modes:
- Master mode supports up to 32 slave TCP connection requests.
- Slave mode supports up to 16 TCP master connections.
- High Data Rate: Configurable baud rate from 300 bps to 115,200 bps with non-blocking communication.
- Industrial-Grade Design: IP40-rated metal housing, wall-mountable, with 1 kV surge protection on serial lines.
- Wide Power Input Range: 9–48 VDC via 2-contact terminal block, with low power consumption (~1.25 W @ 9 VDC).
- Comprehensive Management:
- Web-based GUI and Telnet management interfaces.
- PLANET Modbus Gateway Utility and Smart Discovery Utility for device discovery, configuration, and firmware management.
- Security and Access Control: IP/MAC filtering, user authentication, and configurable access permissions.
- Environmental Resilience: Operates reliably in extreme industrial conditions (-40°C to +75°C, 5–95% RH non-condensing).
- Compliance: Meets FCC Part 15 Class B, CE, and IEC60068-2-32/27/6 standards for free fall, shock, and vibration.
3. Technical Specifications
Physical Characteristics
- Dimensions (W × D × H): 69 × 100 × 22 mm
- Weight: 238 g
- Enclosure: IP40-rated metal housing
- Mounting: Wall-mount kit included
Power
- Input Voltage: 9–48 VDC via 2-contact terminal block
- Power Consumption: Approx. 1.25 W @ 9 VDC (max. 1.6 W)
- Polarity: V+ (positive), V– (negative)
Serial Interface
- Ports: 2 × RS422/RS485
- Connector: 10-contact terminal block (5 contacts per port)
- Supported Modes: RS422 (4-wire), RS485 (2-wire)
- Signals:
- RS422: Tx+, Tx–, GND, Rx+, Rx–
- RS485: Data A(+), GND, Data B(–)
- Baud Rate: 300 bps to 115,200 bps
- Data Bits: 7 or 8
- Parity: Odd, Even, None, Space, Mark
- Stop Bits: 1 or 2
- Flow Control: Hardware (RTS/CTS, DTR/DSR) or None
- Surge Protection: 1 kV
- Transmission Distance: Up to 20 m (RS422/RS485)
Ethernet Interface
- Port: 1 × 10/100BASE-TX RJ45
- Standards: IEEE 802.3, IEEE 802.3u, IEEE 802.3x
- Distance: Up to 100 m (Cat5e or better cable)
- Auto Features: Auto-negotiation, Auto-MDI/MDI-X
Environmental Conditions
- Operating Temperature: -40°C to +75°C
- Storage Temperature: -40°C to +75°C
- Operating Humidity: 5–95% RH (non-condensing)
- Storage Humidity: 5–95% RH (non-condensing)
4. Functionality
The IMG-120T functions as a protocol conversion gateway between Modbus TCP/IP and Modbus RTU/ASCII networks. It enables Ethernet-based SCADA, HMI, or DCS systems to communicate with serial Modbus devices such as PLCs, sensors, and controllers.
Supported Modes:
- Modbus Gateway Modes: RTU Master, RTU Slave, ASCII Master, ASCII Slave
- Serial-Ethernet Modes: TCP Server, TCP Client
Use Cases:
- Integrating legacy Modbus RTU/ASCII devices into modern Ethernet-based control systems.
- Bridging multiple Modbus TCP/IP masters to serial slave devices.
- Connecting SCADA/HMI systems to distributed field devices over Ethernet.
- Industrial automation, building management, energy monitoring, and process control.
Compatibility:
- Works with standard Modbus TCP/IP, RTU, and ASCII protocols.
- Compatible with PLANET’s ICS and IMG series converters and gateways.
5. Components & Accessories
Included Items:
- 1 × IMG-120T Industrial Modbus Gateway
- 1 × Quick Installation Guide
- 1 × User’s Manual CD
Optional Accessories:
- PLANET PWR-40-24 / PWR-60-24 / PWR-75-24 DC power supplies
- Related models: IMG-110T (1-port version), ICS-100/ICS-2100 media converters
Connectors:
- Power: 2-contact terminal block (V+, V–)
- Serial: 2 × 5-contact terminal blocks
- Ethernet: 1 × RJ45 port
Indicators:
- System Power: Green LED
- Ethernet Link/Activity: Green LED
- Serial TX/RX: Green LEDs (TX1/TX2, RX1/RX2)
DIP Switch:
- 4-bit DIP switch for hardware reset to factory defaults
6. Installation & Setup
Requirements:
- PC with Ethernet NIC and web browser (IE 8.0+, Chrome, Firefox, Safari)
- Standard UTP cable (Cat5e or higher)
- DC power source (9–48 VDC)
Mounting Options:
- Wall-mount installation using included kit
- DIN-rail mounting (optional accessory)
Configuration Methods:
- Web Interface: Accessible via default IP 192.168.0.100 (username/password: admin/admin)
- Telnet Interface: Command-line configuration via IP-based Telnet session
- PLANET Utilities:
- *Smart Discovery Utility* for device detection and IP configuration
- *Modbus Gateway Utility* for batch configuration, firmware updates, and monitoring
Reset Procedure:
- Set DIP switch 2 to “ON” and power cycle the device to restore factory defaults.
7. Performance & Capabilities
- Data Throughput: Non-blocking communication on both serial ports
- Baud Rate Range: 300 bps to 115,200 bps
- TCP Connections:
- Master mode: up to 32 slave TCP connections
- Slave mode: up to 16 TCP master connections
- Response Timeout: 10–120,000 ms configurable
- Inter-character Timeout: 0–500 ms
- Inter-frame Delay: 0–500 ms
- Reliability: High immunity to EMI and electrical surges
- Power Efficiency: Low power draw (~1.25 W typical)
- Limitations: Serial cable length limited to 20 m; no standby power mode
8. Standards & Compliance
Network Standards:
- IEEE 802.3 (10BASE-T)
- IEEE 802.3u (100BASE-TX)
- IEEE 802.3x (Full-duplex flow control)
- EIA/TIA RS422/RS485
Regulatory Compliance:
- FCC Part 15 Class B
- CE Mark (EMC Directive)
Environmental & Mechanical Testing:
- IEC60068-2-32 (Free fall)
- IEC60068-2-27 (Shock)
- IEC60068-2-6 (Vibration)
Safety & Environmental Notes:
- WEEE compliant (proper electronic waste disposal)
- No standby mode; disconnect power when not in use to save energy
9. Additional Information
Warranty & Support:
- Manufacturer warranty provided by PLANET Technology Corp.
- Technical support available via PLANET’s global service network.
Maintenance:
- Periodic firmware updates via web interface or utility software.
- Configuration backup and restore supported through HTTP interface.
- LED indicators and web diagnostics for real-time status monitoring.
Firmware & Software Updates:
- Firmware upgradeable via web browser (HTTP upload).
- Configuration files can be downloaded/uploaded for backup or replication.
Security Features:
- User authentication (up to 3 user accounts).
- IP and MAC address filtering for access control.
- Configurable device security (enable/disable web, Telnet, firmware upgrade).
Energy Efficiency:
- Power consumption <1.6 W.
- Recommended to disconnect power when idle for energy savings.
Ordering Information:
- Model: IMG-120T – Industrial 2-Port RS422/485 Modbus Gateway
- Related Models:
- IMG-110T – 1-Port RS422/485 Modbus Gateway
- ICS-100 / ICS-2100 – RS232/RS422/RS485 over Ethernet Media Converters
Summary
The PLANET IMG-120T is a compact, high-reliability industrial Modbus gateway engineered for seamless integration between Ethernet-based Modbus TCP/IP networks and serial Modbus RTU/ASCII devices. With dual isolated RS422/485 ports, robust protocol conversion capabilities, and comprehensive management interfaces, it provides a cost-effective and scalable solution for industrial automation, SCADA, and process control systems. Its rugged IP40 metal housing, wide temperature tolerance, and compliance with industrial standards ensure dependable operation in demanding environments.
The device’s flexible configuration options—via web, Telnet, or PLANET utilities—simplify deployment and maintenance, while its advanced access control and monitoring features enhance network security and operational visibility. The IMG-120T exemplifies PLANET’s commitment to industrial connectivity, offering a reliable bridge between legacy serial systems and modern Ethernet infrastructures.
-
C-IMG-120T_s.pdf
PDF Catalog
-
EM-IMG-120T_v1.1.pdf
Manual
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