Schneider Electric HMIG3U Harmony GTU Premium Box Base Unit

HMIG3U: Harmony GTU Premium Box base unit for universal panels

The HMIG3U is a Schneider Electric Harmony GTU base unit, listed in the datasheet as a Premium Box for universal panels. It has no screen of its own: it is the processing and communication module that sits behind a Harmony GTU display, such as the HMIDT952 in the same lane. Inside is an ARM Cortex-A9 processor, 256 MB of RAM on an internal board and 512 KB of NVRAM backup, with a 1 GB SD card for data storage. Seven Star LLC supplies the HMIG3U in Oman and the GCC as an independent supplier based in Muscat.

The datasheet gives the software package as Vijeo Designer and the range compatibility as Harmony GTU. Because the box and the display are separate items, an order for a working terminal normally needs both, plus any fieldbus expansion card the project requires, so settle the full bill of materials before ordering this base unit.

Typical uses of the HMIG3U in Oman and the GCC

A box of this type is chosen when the display has to be far larger than a compact terminal or when the processing needs to be mounted separately from the screen: operator stations for oil and gas packages, power plant auxiliaries, marine and offshore panels and process skids. The separation also helps maintenance, since the module can be replaced without handling the display.

Installation and spares planning

Allow for the unit’s own clearance on all sides and route the RJ45, serial and USB cables so they can be disconnected without disturbing the display. Keep the SD card and the application project archived; a spare base unit is of little use without the project. Spares planning should consider that the display and the box are replaced independently, so a site holding spares for several panels can stock one box type against many display sizes. When a unit is swapped, restore the project, check the Ethernet addressing and verify every serial link before returning the station to operators.

Operating limits and handling

The unit works from 0 to 60 °C and is stored from −20 to 60 °C, in pollution degree 2 and up to 2000 m. Humidity of 10 to 90 % without condensation is allowed. Vibration data is 3.5 mm at 5 to 9 Hz and 9.8 m/s² at 9 to 150 Hz, with ESD immunity level 3. Cooling is by natural convection, so ventilation space around the module matters inside a warm Gulf cabinet. At 0.9 kg and 188 × 131 × 45 mm the module is compact enough to be fitted behind a panel without a large enclosure.

Approvals listed on the datasheet

The datasheet standards are CSA C22.2 No 142, ANSI/ISA 12-12-01, UL 508, Class I division 2 CSA C22.2 No 213 and IEC 61131-2. Product certifications listed are CE, cULus, ATEX, IEC-Ex, RCM, GL, KC, CUL, EAC, ABS, BV, CCS, DNV, LR, RINA, UKCA and UKEX. That list is broad and includes several marine societies, but the scope of each certificate (zones, conditions, installation rules) must be read from the certificates, not inferred from the list; ask for them in your RFQ if the project is in a classified area or on a vessel or offshore unit.

Connectivity of the HMIG3U

The base unit is communication-rich. Two RJ45 Ethernet ports run at 10/100/1000 Mbit/s, which allows one port to face the control network and another to be used separately where the project needs it; the datasheet does not say whether the ports are switched, so check that detail with the manual if network segregation matters. COM1 is an RJ45 RS485 port and COM2 is a SUB-D 9 port that can be configured as RS232C, RS422 or RS485, both from 110 to 115200 bit/s with 187.5 kbit/s also listed. An auxiliary terminal-block port and an expansion location for a fieldbus card complete the set, together with two USB type A ports and a mini B port.

Listed communication protocols are Modbus, Modbus TCP/IP and Uni-Telway.

Technical specifications of the HMIG3U

Selection checklist for the HMIG3U

• Confirm the Harmony GTU display this box will pair with.
• Check supply: 12 to 24 V DC.
• List the serial and Ethernet connections required and compare with 2 x RJ45, RJ45 RS485 and SUB-D 9 ports.
• Decide if a fieldbus expansion card is needed.
• Confirm certificates for hazardous-area, marine or offshore use if required.
• Plan the backup of the Vijeo Designer project.

Information to send with an RFQ for the HMIG3U

• Reference HMIG3U, quantity and the Harmony GTU display it pairs with.
• Fieldbus card or other expansion requirement.
• Communication ports and protocols in use.
• Certificates required for the installation.
• Delivery location and deadline.

Documents and quotation

The manufacturer datasheet for the HMIG3U is attached on this page; it carries the full specification, the dimension drawings and the panel cut-out and clearance drawings summarised above.

Send us the reference HMIG3U, the quantity and the delivery location and Seven Star LLC will reply to your request for quotation. We are an independent supplier based in Muscat.