IMG-3105AT — IP30 Industrial 1-Port RS232/RS422/RS485 Modbus Gateway with 1-Port 100FX SFP

Descripción

Industrial Modbus Gateway for Modern IIoT Connectivity The IMG-3105AT is designed to bridge Modbus TCP , Modbus RTU , and Modbus ASCII networks for modern industrial automation and IIoT applications. It enables seamless communication between Ethernet-based control systems and legacy serial devices, allowing existing PLCs, RTUs, HMIs, power meters, sensors and industrial controllers to be integrated into IP networks without replacing field equipment. By preserving existing Modbus infrastructures while extending network connectivity, the IMG-3105AT provides an efficient migration path for factories, transportation systems, utilities and building automation toward digitalized industrial environments. MQTT Edge Gateway for Data Aggregation and Distribution The IMG-3105AT expands traditional Modbus gateway functionality by integrating both MQTT Client and built-in MQTT Broker capabilities. It collects data from Modbus RTU/ASCII devices and securely publishes MQTT messages to SCADA systems , MES platforms , edge servers , or cloud services . The embedded MQTT Broker also enables local message exchange without requiring an external broker, simplifying Industrial IoT deployment. In addition to MQTT communication, the IMG-3105AT bridges Modbus TCP/IP and Modbus RTU/ASCII networks , allowing legacy serial devices to be easily integrated into Ethernet-based automation systems. It supports up to 32 TCP slave connections in Master mode and 32 TCP master connections in Slave mode , providing a flexible and reliable solution for industrial hybrid networks. Flexible Modbus Operation Modes The IMG-3105AT supports four Modbus communication modes, including RTU Master , RTU Slave , ASCII Master , and ASCII Slave . These operation modes provide flexible deployment for various industrial control architectures and simplify communication between Modbus TCP networks and serial Modbus devices. Whether operating as a master or slave, the gateway enables reliable protocol conversion, centralized monitoring and seamless integration of legacy Modbus equipment into modern Ethernet infrastructures. Secure Remote Management and Cybersecurity The IMG-3105AT provides comprehensive remote management through web-based interfaces, SNMP and CloudNMS monitoring, allowing administrators to remotely configure, monitor and maintain devices with ease. To strengthen cybersecurity, the gateway supports Secure Boot , SNMP v1/v2c/v3 , MQTT over TLS , firmware upgrade, configuration backup and restore, user authentication, and secure management mechanisms. Event Log, Syslog, SNMP Trap and Relay Alarm functions further simplify maintenance while improving system availability and operational reliability. Stable Performance under Harsh Industrial Environments Designed for demanding industrial applications, the IMG-3105AT features a rugged IP30-rated metal enclosure , wide operating temperature range from -40 to 75°C , redundant 9~48V DC / 24V AC power inputs with automatic failover, surge protection and ESD immunity. Supporting both DIN-rail and wall-mount installation, the gateway ensures stable and continuous Modbus communication in factories, transportation systems, power substations and other mission-critical industrial environments. Dual Power Input for High Availability Network Systems The IMG-3105AT features a redundant dual power input design supporting 9V to 48V DC operation for enhanced system reliability. When the primary power source fails, the built-in hardware failover mechanism automatically switches to the backup supply, ensuring uninterrupted communications and continuous operation. This high-availability design is especially suitable for remote sites, process control systems and mission-critical industrial applications where maintaining network uptime is essential. PLANET CloudNMS – Cloud-Based Universal Network Management PLANET’s CloudNMS platform and mobile app empower IT staff to remotely manage all network devices and Powered Devices (PDs) in real time. Designed for enterprises and industries, CloudNMS minimizes the need for on-site troubleshooting by providing centralized monitoring, fault detection, and instant alerts. With CloudNMS , businesses can manage diverse network deployments more efficiently , securely , and intelligently —all from a single cloud-based platform. Applications MQTT Edge-to-Cloud Data Aggregation The IMG-3105AT serves as an Industrial IoT edge gateway by collecting data from Modbus RTU/ASCII devices such as PLCs, RTUs, power meters, and industrial controllers. Acting as an MQTT Client , it securely publishes operational data to SCADA systems , MES platforms , edge servers , cloud services , or third-party MQTT servers . The built-in MQTT Broker also enables local message exchange between connected devices and applications without requiring an external broker, simplifying system deployment while reducing infrastructure costs. Multi Modbus TCP/IP Master to RTU/ASCII Slaves The IMG-3105AT can operate as a bridge between the multi-industrial TCP/IP master equipment and the industrial RTU/ASCII slave equipment in a Modbus TCP/IP networking environment to control the industrial RTU/ASCII slave equipment via the multi-industrial TCP/IP master equipment. Key Features Physical Ports 1 100BASE-FX SFP slot One DB9 interface that support RS-232 One terminal block interface that supports 2-wire RS-485 and 4-wire RS-422/RS-485 standards Serial Interface & Operation Modes High-Speed Transmission Supports asynchronous serial data rates up to 921600bps Versatile Serial Operation Modes Supports RTU Master mode Supports RTU Slave mode Supports ASCII Master mode Supports ASCII Slave mode Industrial Protocol Conversion Supports protocol conversion between Modbus TCP and Modbus RTU/ASCII Multi-Host Connectivity Supports up to 32 TCP slave connections in Master mode Supports up to 32 TCP master connections in Slave mode Industrial IoT Integration (MQTT) Supports MQTT Client and built-in MQTT Broker functions Supports Transparent Publish, Topic Distribution and Transparent Subscribe mechanisms Supports Internal and External MQTT Broker connections Supports QoS 0/1/2, TLS encryption and Username/Password authentication Management & Security Network Management Supports IPv4 and IPv6 dual stack management Supports ARP, ICMP, TCP/IP, UDP, HTTP/HTTPS server, DHCP client and SNMP v1/v2c/v3 Supports LLDP protocol Supports IP NTP (Network Time Protocol) and DNS management Secure Management Supports HTTPS encrypted management Supports Certificate Management Supports SNMP v3 Supports RADIUS/TACACS+ user authentication Supports Secure Boot technology for system integrity protection Configuration & Maintenance Supports firmware upgrade Supports configuration backup and restore Supports HTTP/HTTPS Web management Supports PLANET Smart Discovery Utility Supports PLANET NMS System and CloudNMS Intelligent Event Notification: Comprehensive alarm mechanism via Event Log, Syslog, SNMP Trap, and Relay Alarm output Industrial Case & Installation Rugged Industrial Design IP30 rugged metal enclosure DIN-rail and wall-mount installation Operating temperature from -40 to 75°C Free fall, shock and vibration resistance for industrial environments Redundant Power Design Dual redundant power input supporting 9~48V DC and 24V AC Reverse polarity protection Supports hardware automatic failover mechanism for uninterrupted operation Electrical Protection Supports 6000V DC Ethernet ESD protection Supports 2KV surge protection Diagnostics & Hardware Control Extensive LED indicators for network and serial status diagnosis Reset button for system reboot and factory default restoration

Especificaciones técnicas

Serial Ports

1 x DB9 male for RS-232 1 x 4-Pin Terminal block for RS-422 / RS-485

Serial Standards

RS-232 / 4-wire RS-422 or RS-485 / 2-wire RS-485

Baud Rate (Data Rate)

50bps to 921Kbps

Data Bits

5, 6, 7, 8

Parity Type

Odd, Even, None, Space, Mark

Stop Bit

1, 1.5, 2

Flow Control

RTS/CTS and DTR/DSR (RS-232 only) XON/XOFF

Signals

RS-232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND RS-422: Tx+, Tx-, Rx+, Rx-, GND 4-wire RS-485: Tx+, Tx-, Rx+, Rx-, GND 2-wire RS-485: Data A (+), Data B (-), GND

Pin Assignment

Pin RS232 RS422 RS485-4W RS485-2W 1 DCD TxD+ -- 2 RxD TxD- -- 3 TxD RxD- Data- 4 DTR RxD+ Data+ 5 GND GND GND 6 DSR -- -- 7 RTS -- -- 8 CTS -- -- 9 -- -- --

Pin

RS232 | RS422 RS485-4W | RS485-2W

1

DCD | TxD+ | --

2

RxD | TxD- | --

3

TxD | RxD- | Data-

4

DTR | RxD+ | Data+

5

GND | GND | GND

6

DSR | -- | --

7

RTS | -- | --

8

CTS | -- | --

9

-- | -- | --

Operation Mode

Modbus RTU Master Modbus RTU Slave Modbus ASCII Master Modbus ASCII Slave

TCP Connections

Master mode: Up to 32 TCP Slave connections Slave mode: Up to 32 TCP Master connections

Ethernet Ports

1 x SFP

Standard

100BASE-FX

Distance

2 km to 120 km (depending on SFP module)

Installation

DIN-rail kit and wall-mount ear

Enclosure

IP30 metal

Dimension (W x D x H)

32 x 87.8 x 135 mm

Weight

392g

LED Indicators

System: PWR1 ( Green ) PWR2 ( Green ) Alarm ( Red ) Port Interfaces: LNK/ACT ( Green ) RX ( Amber ) TX ( Green )

Power Requirements

9~48V DC, redundant power with reverse polarity protection 24V AC

Power Consumption

Max. 2.88 watts / 9.83 BTU (Power on without any connection) Max. 2.88 watts / 9.83 BTU (Full loading)

Connector

Removable 6-pin terminal block for power input Pin 1/2 for Power 1, Pin 3/4 for fault alarm, Pin 5/6 for Power 2

Alarm

One relay output for power failure Alarm relay current carry ability: 1A @ 24V DC

ESD Protection

6KV

Surge Protection

2KV

Reset Button

< 5 sec: System reboot > 5 sec: Factory default

Management Interfaces

HTTP Web management HTTPS Web management Windows-based VCOM Utility management SNMPv1, v2c and v3 PLANET Smart Discovery Utility PLANET on-premise NMS System and cloud-based CloudNMS

IP Protocol

IPv4 / IPv6

Time Management

NTP Client

Name Service

DNS Client

Network Protocol

LLDP

System Maintenance

Firmware Upgrade Configuration Backup / Restore

Diagnostic

Event Log Syslog

Event Notification

SNMP Trap Relay Alarm

SNMP MIBs

RFC 1213 MIB-II RFC 1215 Generic Traps RFC 2737 Entity MIB (Version 2) RFC 2863 Interface Group MIB RFC 3635 Ethernet-like MIB

Hardware Security

Hardware-based Secure Boot Arm® TrustZone® Technology Hardware True Random Number Generator (TRNG) Hardware-accelerated AES, SHA, ECC and RSA Cryptographic Operations Hardware Key Store and OTP Protection for Secure Boot Keys

System Security

HTTPS Secure Web Management HTTP-to-HTTPS Redirection Certificate Management IP-based Management Access Control TLS 1.2 / TLS 1.3 SNMP v3 Authentication and Encryption

MQTT Operation Modes

MQTT Client Built-in MQTT Broker

MQTT Messaging

Retained Messages Last Will and Testament (LWT)

Publish Methods

Transparent Serial Data Publishing Data Mapping-based Publishing

Subscribe Methods

Transparent MQTT-to-Serial Data Forwarding

Quality of Service

MQTT QoS Level 0, 1 and 2

Authentication

Username and Password

Transport Security

MQTT over TLS 1.2

Broker Connectivity

Built-in or External MQTT Broker

Regulatory Compliance

FCC Part 15 Class A CE Certification Class A

Stability Testing

IEC60068-2-32 (Free fall) IEC60068-2-27 (Shock) IEC60068-2-6 (Vibration)

Standards

IEEE 802.3 10BASE-T IEEE 802.3u 100BASE-TX RFC 768 UDP RFC 793 TCP RFC 791 IP RFC 792 ICMP RFC 5905 NTPv4 RFC 1591 DNS (client only) RFC 1908 SNMPv2c RFC 2616 HTTP/1.1 RFC 2131 DHCP Client RFC 2732 Format for Literal IPv6 Addresses in URL's RFC 3315 DHCPv6 Client RFC 3513 IPv6 Addressing Architecture RFC 3596 DNSv6 RFC 4443 ICMPv6 EIA/TIA RS-232/422/485

Regulatory Approval

RoHS

Operating Temperature

-40 ~ 75 degrees C

Storage Temperature

-40 ~ 85 degrees C

Humidity

5 ~ 95% (non-condensing)