HMIG3U

Configured for HMI processing and local machine data communication in the Harmony GTU platform, the Schneider Electric HMIG3U (HMIG3U Base Unit) provides direct physical and electrical interfaces through Ethernet, serial communication, USB, and SD card storage. The unit uses an ARM Cortex-A9 processor, 256 MB RAM, 512 KB NVRAM, and a pre-installed 1 GB SD card.

Hardware Specifications

Parameter	Specification
Model	HMIG3U
Brand	Schneider Electric
Product Type	Base Unit / Premium Box
Range	Harmony GTU
Processor	ARM Cortex-A9
Internal Memory	256 MB RAM
Backup Memory	512 KB NVRAM
Data Storage	1 GB SD card
SD Card Slots	2
Rated Supply Voltage	12...24 VDC
Ethernet	10BASE-T / 100BASE-TX / 1000BASE-T
Ethernet Port	1 x RJ45
Serial Communication	RS232C / RS422 / RS485
Serial Speed	110...115200 bit/s; 187.5 kbit/s
USB	2 x USB 2.0 Type A, 1 x USB 2.0 Mini-B
Communication Protocols	Modbus, Modbus TCP/IP, Uni-Telway
Software	Vijeo Designer
Cooling	Natural convection
Dimensions	188 x 131 x 45 mm
Weight	0.9 kg
Operating Temp	0...60 deg C
Storage Temp	-20...60 deg C
Relative Humidity	10...90 % non-condensing
Operating Altitude	Up to 2000 m
Pollution Degree	2, IEC 61131-2
Vibration Resistance	3.5 mm at 5...9 Hz; 9.8 m/s2 at 9...150 Hz
Certifications	CE, cULus, ATEX, IECEx, RCM, GL, KC, EAC, ABS, BV, CCS, DNV, LR, RINA, UKCA, UKEX
Power Consumption	Not specified in supplied data

PLC and HMI Communication Interfaces

The HMIG3U provides Ethernet TCP/IP through an RJ45 interface with 10BASE-T, 100BASE-TX, and 1000BASE-T operation. Serial interfaces support RS232C, RS422, and RS485 electrical connections. Supported protocols include Modbus, Modbus TCP/IP, and Uni-Telway.

The interface arrangement also includes two USB 2.0 Type A ports and one Mini-B USB port. An expansion unit fieldbus card can be connected through the specified expansion interface.

Frequently Asked Questions

Q: What communication protocols are supported by the HMIG3U?
A: The supplied specifications identify Modbus, Modbus TCP/IP, and Uni-Telway.

Q: What memory and storage are provided?
A: The unit contains 256 MB RAM, 512 KB NVRAM backup memory, and a pre-installed 1 GB SD card. Two SD card slots are provided.

Q: What is the specified operating temperature range?
A: The operating ambient temperature is 0...60 deg C. Storage temperature is -20...60 deg C.

Field Installation Guidelines

Install the HMIG3U in the specified Harmony GTU mechanical configuration and maintain adequate clearance for natural convection cooling. Verify the 12...24 VDC supply before energizing the unit.

Route Ethernet, serial, USB, and power wiring separately where practical to reduce electromagnetic coupling. Use appropriate shield termination and protective grounding practices for the installation environment. Confirm RS232C, RS422, or RS485 wiring polarity and interface selection before commissioning.

Install SD cards with power conditions and handling procedures appropriate for electronic memory media. Verify the selected communication protocol and serial parameters in Vijeo Designer before connecting the terminal to the control network.

---