Description
The Mitsubishi Electric GT1685M-STBD is a high-performance 12.1-inch HMI operator terminal designed to deliver robust visualization and system control within the GOT1000 architecture. Equipped with a high-brightness SVGA TFT color display supporting 65,536 colors, this multimedia-compliant interface provides operators with exceptional clarity and wide viewing angles in demanding industrial environments. The unit features 15MB of internal flash memory for handling complex graphics, logging data, and hosting system OS configurations. Designed for seamless system integration, it features built-in Ethernet, RS-232, and RS-422/485 serial interfaces, along with dual USB ports and a CompactFlash card slot, ensuring versatile connectivity to PLCs, frequency drives, and supervisory control networks.
Features
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High-Resolution Display: 12.1-inch TFT color LCD screen with SVGA (800 x 600) resolution and an adjustable 8-step backlight intensity reaching 470 cd/m2.
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Analog Resistive Touch Interface: High-precision single-touch resistive panel engineered for reliable operation even when operators are wearing heavy work gloves.
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Built-in Human Sensor: Automatically detects operators up to 1 meter away to trigger backlight activation, conserving energy and extending display longevity.
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Comprehensive Connectivity: Native interfaces for Ethernet, RS-232, and RS-422/485 enable concurrent multi-channel communication with various controllers.
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Industrial Hardening: Rated IP67 on the front face for complete protection against dust entry and water ingress during washdown cycles.
Applications
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Automotive Assembly Lines: Serves as a primary system control interface, displaying complex diagnostic screens and plant-floor metrics.
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Water and Wastewater Treatment: Provides localized monitoring of pumping stations, valve configurations, and flow measurements.
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Packaging and Food Processing: Operates reliably in wet environments and high-vibration machinery locations due to its IP67-rated front face.
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Material Handling and Conveyor Control: Acts as the operator hub for sorting, routing, and real-time alarm monitoring.
Technical Specifications
| Parameter |
Specification Value |
| Manufacturer |
Mitsubishi Electric |
| Model Number |
GT1685M-STBD |
| Series |
GOT1000 (GT16 Platform) |
| Display Device Type |
TFT Color LCD (High-Brightness, Wide Viewing Angle) |
| Screen Size |
12.1-Inch |
| Resolution |
800 x 600 pixels (SVGA) |
| Display Colors |
65,536 colors |
| Viewing Angle |
Right/Left: 80 degrees, Up: 60 degrees, Down: 80 degrees |
| Backlight Type |
Replaceable Cold-Cathode Fluorescent Tube (CCFL) |
| Touch Panel Type |
Analog Resistive (Single Point) |
| Built-in Memory |
15MB Flash Memory (C Drive) |
| Input Power Supply Voltage |
24VDC (+25%, -20%) |
| Power Consumption |
40W or less (26W or less with backlight off) |
| Withstand Voltage |
500VDC for 1 minute between power terminal and ground |
| Insulation Resistance |
10 Mohms or higher (500VDC via insulation tester) |
| Protective Construction |
Front Face: IP67, Inside Cabinet: IP2X |
| External Dimensions (W x H x D) |
316 x 242 x 52 mm |
| Panel Cutout Dimensions |
302 x 228 mm |
| Net Unit Weight |
2.7 kg |
| Shipping Weight (Calculated) |
3.85 kg |
| Package Dimensions (Calculated) |
395 x 310 x 145 mm |
Connections and Interfaces
| Interface Type |
Connector / Specification |
Functional Assignment |
| RS-232 |
D-sub 9-pin (Male) |
PLC communication, PC programming connection (up to 115200 bps) |
| RS-422/485 |
14-pin (Female) |
Controller networking and multi-drop fieldbus interfaces (up to 115200 bps) |
| Ethernet |
RJ-45 (100BASE-TX) |
Network controller link, MES interface data routing, remote host interface |
| USB Host |
Type-A (USB 1.1 / 2.0 Full Speed) |
External storage transfer, keyboard/mouse integration, barcode reader interface |
| USB Device |
Mini-B (USB 1.1 / 2.0 Full Speed) |
Direct PC interface for project transfer, OS updates, FA transparent mode |
| CF Card Slot |
Type I CompactFlash |
Data logging, recipe management, backup system boot, localized screen storage |
Empirical Engineering Insights
Alternative Models & Compatibility
The GT1685M-STBD is part of the legacy GOT1000 product family. For modern system designs requiring migration to current-generation platforms, this module corresponds functionally to the GOT2000 series (such as the GT2712-STBD). Screen designs developed in GT Works3 for the GT1685M can be automatically up-scaled and compiled to the GT27 series via the native migration utility in GT Works3. Ensure you check communications module configurations during migration, as back-plane extension units differ between GOT1000 and GOT2000 generations.
Application Pitfalls & Engineering Notes
When deploying the GT1685M-STBD in environments with high electrical noise, ensure that the 24VDC power supply is clean and dedicated. Transient voltage drops or ripple patterns exceeding the -20% threshold (below 19.2VDC) can trigger unexpected watchdog resets or touch calibration drifts. Additionally, verify that the display backlight time-out settings are optimized in the project configuration; prolonged screen-on time at max brightness (470 cd/m2) in temperatures exceeding 45 degC accelerates CCFL tube aging, decreasing the typical 50,000-hour functional lifespan.
Commissioning & Wiring Tips
For industrial communication via the 14-pin RS-422/485 interface, use twisted-pair shielded cables (such as Belden 3106A or equivalent). Connect the shield wire securely to the Functional Ground (FG) terminal on the GOT terminal block and ground it at a single point inside the enclosure. When utilizing GT Works3 for project updates, use the Mini-B USB port for fast, high-integrity transfers; however, if upgrading over Ethernet, establish a static IP address on your configuration laptop matching the sub-net mask of the local HMI to prevent transfer interruptions.
Installation Guidelines
CRITICAL WARNING:
Before performing any mechanical installation, panel cutting, or wiring modifications, completely isolate and de-energize the main cabinet feed. Verify with a calibrated multimeter that all terminal connections are at 0V. Failure to isolate incoming 24VDC feeds can lead to terminal damage, internal module component failure, or risk of electric shock.
1
Prepare a precise panel cutout of 302 mm width by 228 mm height. Deburr all metal edges to prevent scoring of the protective gasket.
2
Check that the liquid-tight rubber gasket is seated properly in the HMI bezel groove to secure the IP67 front face protection.
3
Insert the HMI through the front of the cutout. Tighten the supplied metal mounting brackets from the rear. Apply a tightening torque of 0.36 to 0.48 N-m to prevent front panel warping.
4
Terminate the 24VDC power connections using M3 screw-clamp terminals (using RAV1.25-3 or V2-S3.3 lugs). Torque the terminal block screws to between 0.5 and 0.8 N-m.
5
Connect the dedicated functional ground (FG) wire to a clean terminal strip on your backplane. Proceed to hook up serial, Ethernet, and USB cables as project logic dictates.