1. Product Overview

Product Name: Industrial Modbus Gateway
Model: IMG-110T
Series: Industrial 1-Port RS422/RS485 Modbus Gateway
Article Number: IMG-110T
Manufacturer: PLANET Technology Corporation

The PLANET IMG-110T is an industrial-grade Modbus TCP/RTU/ASCII gateway designed to bridge Ethernet-based Modbus TCP/IP networks with serial-based Modbus RTU or ASCII devices. It provides a single RS422/485 serial interface and a 10/100BASE-TX Ethernet port, enabling seamless communication between legacy serial equipment and modern IP-based control systems. Engineered for harsh industrial environments, the IMG-110T features a rugged IP40-rated metal housing, wide operating temperature range (-40°C to 75°C), and flexible DC power input (9–48V).

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2. Key Features

- Protocol Conversion: Converts between Modbus TCP/IP and Modbus RTU/ASCII protocols, supporting both master and slave modes.
- Serial Interface: One RS422/RS485 port with a 5-contact terminal block, supporting 2-wire RS485 or 4-wire RS422 operation.
- Ethernet Interface: One 10/100BASE-TX RJ45 port compliant with IEEE 802.3 and IEEE 802.3u standards, supporting auto-negotiation and auto-MDI/MDI-X.
- Flexible Operation Modes:
- RTU Master / RTU Slave
- ASCII Master / ASCII Slave
- TCP Server / TCP Client
- High Connectivity:
- Master mode supports up to 32 TCP slave connections.
- Slave mode supports up to 16 TCP master connections.
- Management Interfaces:
- Built-in web-based management (HTTP)
- Telnet console
- PLANET Modbus Gateway Utility
- PLANET Smart Discovery Utility
- Security & Access Control: IP and MAC address filtering, user authentication, and configurable access permissions.
- Industrial Design: IP40-rated metal enclosure, wall-mountable, high EMI/surge immunity, and wide temperature tolerance.
- Diagnostics & Monitoring: LED indicators for system, Ethernet link/activity, and serial TX/RX; real-time serial port state monitoring via web/telnet interface.
- Firmware & Configuration Management: Supports firmware upgrades, configuration backup, and restore via HTTP.
- Energy Efficiency: Low power consumption (~1.25W @ 9VDC).

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3. Technical Specifications

Physical Characteristics
- Dimensions (W x D x H): 69 × 100 × 22 mm
- Weight: 238 g
- Enclosure: IP40-rated metal housing
- Mounting: Wall-mount kit included

Power Requirements
- Input Voltage: 9–48V DC via 2-contact terminal block
- Power Consumption: 1.1–1.61 W (max. 5.4 BTU/hr)
- Polarity: V+ (positive), V– (negative)

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)

Serial Port
- Interface: RS422/RS485 x 1
- Connector: 5-contact terminal block
- Surge Protection: 1 kV
- 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
- Signal Pins:
- RS422: Tx+, Tx–, Rx+, Rx–, GND
- RS485: Data A(+), Data B(–), GND
- Transmission Distance: Up to 20 m (typical)

Ethernet Port
- Standards: IEEE 802.3 (10BASE-T), IEEE 802.3u (100BASE-TX), IEEE 802.3x (Full-duplex flow control)
- Connector: RJ45 (auto-MDI/MDI-X, auto-negotiation)
- Distance: Up to 100 m over Cat5e/6 UTP cable

LED Indicators
- System Power: Green (ON = powered)
- Ethernet Link/Activity: Green (ON = link, Blinking = activity)
- Serial TX/RX: Green (Blinking = data transmission/reception)

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4. Functionality

The IMG-110T functions as a transparent gateway between Modbus TCP/IP and Modbus RTU/ASCII networks. It enables Ethernet-based SCADA, HMI, or PLC systems to communicate with serial Modbus devices such as sensors, controllers, and meters.

Operation Modes:
- RTU Master Mode: Connects to up to 32 Modbus TCP/IP slave devices.
- RTU Slave Mode: Accepts requests from up to 16 Modbus TCP/IP master devices.
- ASCII Master/Slave Modes: Provides ASCII-based communication bridging.
- TCP Server/Client: Supports both server and client roles for flexible network integration.

Applications:
- Industrial automation and control systems
- SCADA and HMI integration
- Building management systems (BMS)
- Energy monitoring and metering
- Factory floor device networking
- Remote equipment management

Compatibility:
- Modbus TCP, Modbus RTU, Modbus ASCII
- IP, ARP, DHCP, DNS protocols
- Works with Windows, Linux, and other TCP/IP-based systems

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5. Components & Accessories

Package Contents:
- IMG-110T Industrial Modbus Gateway (1 unit)
- Quick Installation Guide
- User’s Manual CD

Included Hardware:
- Wall-mount kit
- 2-contact terminal block (power input)
- 5-contact terminal block (RS422/485 interface)

Optional Accessories:
- DIN-rail mounting kit (if required)
- External DC power supply (9–48VDC)
- Ethernet patch cables (Cat5e/Cat6)

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6. Installation & Setup

Mounting Options:
- Wall-mount installation using included bracket
- DIN-rail mounting (optional accessory)

Power Connection:
- Connect DC power to the 2-contact terminal block (V+, V–).
- Recommended wire gauge: 12–24 AWG.
- Ensure correct polarity to prevent damage.

Serial Connection:
- Use the 5-contact terminal block for RS422/485 wiring.
- Configure for 2-wire RS485 or 4-wire RS422 as required.

Ethernet Connection:
- Connect the RJ45 port to a 10/100BASE-TX network switch or router using a standard UTP cable.

Configuration:
- Default IP Address: 192.168.0.100
- Default Subnet Mask: 255.255.255.0
- Default Username/Password: admin/admin
- Access via web browser (HTTP) or Telnet.
- Use PLANET Smart Discovery Utility to locate and configure devices on the network.

Reset to Factory Defaults:
- Use the DIP switch (position 2 ON) and power cycle the device.
- After reset, return DIP switch to OFF position.

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7. Performance & Capabilities

Data Throughput:
- Serial data rate: 300 bps to 115.2 kbps
- Ethernet: 10/100 Mbps full-duplex

Connection Capacity:
- Master mode: up to 32 TCP slave connections
- Slave mode: up to 16 TCP master connections

Latency & Timing Control:
- Response Timeout: 10–120,000 ms
- Inter-character Timeout: 0–500 ms
- Inter-frame Delay: 0–500 ms
- Initialization Delay configurable for device startup synchronization

Reliability:
- Surge protection on serial interface (1 kV)
- High EMI immunity for industrial environments
- Stable operation under vibration and shock (IEC60068-2-6/27/32)

Limitations:
- Single serial port (1 channel)
- Maximum serial cable length ~20 m (typical RS485/422 limitation)

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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 compliance)

Environmental & Mechanical Testing:
- IEC60068-2-32 (Free fall)
- IEC60068-2-27 (Shock)
- IEC60068-2-6 (Vibration)

Safety & Environmental Notes:
- WEEE Directive compliant (proper electronic waste disposal)
- No standby mode; disconnect power when not in use for energy saving

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9. Additional Information

Warranty & Support:
- Standard manufacturer warranty (contact PLANET for details)
- Technical support available via PLANET’s website and authorized distributors

Maintenance:
- Periodic firmware updates via web interface
- Configuration backup and restore supported
- Regular inspection of terminal connections recommended in high-vibration environments

Firmware & Software Tools:
- PLANET Modbus Gateway Utility: For device discovery, configuration, and firmware management.
- PLANET Smart Discovery Utility: For network scanning and IP configuration.
- Web Management Interface: For configuration, monitoring, and diagnostics.
- Telnet CLI: For command-line configuration and advanced management.

Security Features:
- User authentication (up to 3 user accounts)
- IP and MAC filtering (up to 16 rules each)
- Configurable access permissions (Administrator/Guest)
- Disable/enable web, telnet, firmware upgrade, and device search functions

Firmware Upgrade Procedure:
- Access via web interface → System Management → System File → Upgrade Firmware
- Supports upload from local PC via HTTP

Energy Saving Note:
- Device does not support standby mode; disconnect power when inactive to reduce energy consumption.

Environmental Responsibility:
- Complies with WEEE recycling standards; do not dispose of as unsorted municipal waste.

Revision Information:
- Model: IMG-110T
- Revision: 1.0 (May 2017)
- Part No.: 2081-AH1230-000

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Summary

The PLANET IMG-110T Industrial Modbus Gateway is a compact, robust, and versatile communication bridge designed for industrial automation environments. It enables seamless integration between Ethernet-based Modbus TCP/IP systems and serial Modbus RTU/ASCII devices, supporting both master and slave configurations. With its wide operating temperature range, IP40 metal housing, and comprehensive management interfaces, the IMG-110T is ideal for SCADA, HMI, and industrial control applications requiring reliable and secure serial-to-Ethernet connectivity.

Its combination of flexible configuration, strong environmental resilience, and advanced management utilities makes it a cost-effective and dependable solution for modernizing industrial communication networks.