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Schneider Electric HMISTU855S

Schneider HMISTU855S Harmony STU HMI, 5.7" QVGA, 16 MB, Modbus TCP/IP

MPNHMISTU855S
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Schneider HMISTU855S Hmi Operator Interfaces.

$1,255.00 – $2,046.78Ref. price · indicative, final on quote
Schneider Electric HMISTU855S datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

HMISTU855S key specifications
ParameterValue
Display typeQVGA TFT colour touchscreen
Range of productHarmony STO & STU
Product or component typeTouch panel screen
Integrated connection type1 USB 2.0 type mini B 1 USB 2.0 type A COM1 serial link - female RJ45 - RS232C/RS485 power supply - removable screw terminal block
Supply voltage limits20.4...28.8 V
Supply voltage24 V DC
Inrush current30 A
Power consumption in6.8 W
Processor frequency333 MHz
Enclosure materialPC/PBT and PAA
IP degree of protectionIP20 IEC 60529 rear panel) IP65 IEC 60529 front panel)
NEMA degree of protectionNEMA 4X front panel (indoor use)

All specifications

HMISTU855S additional specifications
ParameterValue
Downloadable protocolsModbus TCP/IP Modbus Third party protocols Uni-TE
Shock resistance15 gn 11 msIEC 60068-2-27
Relative humidity0...85 % without condensation
Operating altitude<= 6561.68 ft (2000 m)
Vibration resistance+/- 3.5 mm 5...9 Hz) IEC 60068-2-6 1 gn 9...150 Hz) IEC 60068-2-6
Depth2.2 in (56.5 mm)
Width6.4 in (163 mm)
Height5.08 in (129.15 mm)
Display colour65536 colours
StandardsIEC 61131-2 UL 508 FCC Class A UL 1604 IEC 61000-6-2
SupplyExternal source
MarkingCE
CategoryUS10MC222569
Brightness16 levels
Fixing modeØ 22 mm hole
Touch panelAnalogue
Size5.7 inch
Character fontTaiwanese (traditional Chinese) Japanese (ANK, Kanji) ASCII Korean Chinese (simplified Chinese)
Processor nameCPU ARM9
Realtime clockAccess to the PLC real-time clock
Number of pagesLimited by internal memory capacity
Backlight lifespan50000 hours
Display resolution320 x 240 pixels QVGA
Memory descriptionApplication memory 16 MB Back up of data 64 kB
Immunity to microbreaks7 ms
Ambient air temperature for storage-4...140 °F (-20...60 °C)
Resistance to electromagnetic fields9.1 V/m (10 V/m) IEC 61000-4-3
Ambient air temperature for operation32...122 °F (0...50 °C)

Product details

Overview

The HMISTU855S is a Schneider Harmony STU HMI with a 5.7-inch QVGA TFT color touchscreen at 320 x 240 pixels and 65536 colors, running on an ARM9 processor. It carries 16 MB of application memory and 64 kB of backup data, communicating over Modbus TCP/IP, Uni-TE, and third-party protocols from a 24 V external supply. The enclosure is rated IP20 with a NEMA 4X front panel for indoor use, and the unit withstands 15 gn 11 ms shock per IEC 60068-2-27. Compliance covers IEC 61131-2, UL 508, FCC Class A, UL 1604, and IEC 61000-6-2.

Memory and display comparison vs HMIST6400

Compared to the HMIST6400, the HMISTU855S has a smaller application memory (16 MB vs 1 GB device memory), a lower-resolution display (320 x 240 QVGA), and draws less power (6.8 W).

The HMISTU855S carries CE marking and is listed under California Proposition 65. It meets IEC 61131-2, UL 508, FCC Class A, UL 1604, and IEC 61000-6-2 standards. The front panel is NEMA 4X rated for indoor use, and the unit is tested to 15 gn 11 ms shock.

MPN
HMISTU855S