Key Technical Specifications

Parameter	Value / Note
Product Model	NEC 136-551733-B-02
Manufacturer	NEC
Product Type	Industrial HMI / touch-panel display
Display Size	10.4 inch
Display Type	TFT LCD
Resolution	800 × 600
Color Depth	65,536 colors
Touch Type	4-wire resistive
Processor	32-bit RISC, approximately 400 MHz
Memory	Approximately 64 MB DRAM / 128 MB flash
Ethernet	1 × 10/100Base-T
Serial Ports	3 × COM
USB	USB 1.1 host / USB 2.0 client
SD Card Slot	Yes
Power Input	24V DC ±20%, approximately 300 mA
Operating Temperature	0°C to 50°C
Front Panel Protection	Approximately IP65 / NEMA 4
Dimensions W × H × D	286 × 212 × 50 mm
Panel Cutout W × H	259 × 201 mm
Weight	Approximately 1.6 kg

 

Product Introduction

NEC 136-551733-B-02 is a 10.4-inch industrial HMI touch panel used for local operation, monitoring, parameter setting, and equipment status display in automation systems. It is typically applied to CNC-related equipment, labeling machines, cutting machines, pick-and-place systems, and other industrial machines where an operator needs a compact graphical interface.The unit combines a resistive touch screen, serial communication ports, Ethernet connectivity, and 24V DC power input in a panel-mount package. Its main replacement requirement is not just the model number. The installed project file, communication settings, COM port assignment, Ethernet address, and software version must match the existing application.

Installation & Configuration Guide

Preparation — 10 min

1. Confirm the failed or removed unit is NEC 136-551733-B-02.
2. Record the full label, revision, serial number, and any visible software or firmware markings.
3. Photograph the rear connectors, mounting clips, COM port assignments, and Ethernet connection.
4. Back up the existing HMI project file if possible.
5. Verify the 24V DC supply is within range: 24V DC ±20%.

Safety: Disconnect 24V DC power before removing or installing the unit. If the HMI is connected to PLCs, drives, or safety-related equipment, confirm that removal will not affect machine operation.

Removal — 5–10 min

1. Label all communication and power cables.
2. Disconnect the Ethernet cable, COM cables, USB cables, and power supply.
3. Release the panel mounting clips or screws.
4. Push the unit out from the front panel carefully.
5. Place the removed unit in an anti-static bag if it will be stored or returned.

Warning: If the rear connectors are corroded, melted, or damaged, inspect the mating cables and power supply before installing the replacement.

Installation — 10 min

1. Check the replacement 136-551733-B-02 for cracked housing, damaged touch surface, bent pins, or loose connectors.
2. Insert the unit into the panel cutout from the front.
3. Secure the mounting clips or screws evenly.
4. Reconnect cables according to the recorded labels.
5. Confirm COM port, Ethernet, and power connections are correct before applying power.

Check: A loose 24V DC connection can cause screen flicker, random reboots, or communication loss.

Power-On & Test — 10 min

1. Apply 24V DC power.
2. Observe the startup screen.
3. Confirm the HMI project loads correctly.
4. Test touch response across the screen.
5. Verify communication with the connected PLC, drive, or controller.
6. Check Ethernet and COM port functions if used.

 

Troubleshooting Quick Reference

Symptom	Most Likely Cause	First Check
No power / blank screen	24V DC supply or wiring fault	Measure 24V DC at HMI power terminals
Touch not responding	Touch calibration or screen damage	Recalibrate touch or test with known project
Communication failure	COM port or Ethernet mismatch	Check baud rate, port assignment, IP settings
Project will not load	Wrong firmware or corrupted project	Verify software version and project file
Screen flickers	Loose power or backlight issue	Reseat power connector and check supply stability
Intermittent reboot	Power ripple or poor grounding	Measure supply and check 24V DC wiring

Dimensions, Mounting & Wiring Notes

• Overall Dimensions W × H × D: 286 × 212 × 50 mm
• Panel Cutout W × H: 259 × 201 mm
• Mounting Method: Front panel mount with rear clips or screws
• Power Wiring: 24V DC supply, approximately 300 mA
• Communication Wiring:
  • COM1: RS-232 / RS-485 2-wire / 4-wire
  • COM2: RS-232
  • COM3: RS-232 / RS-485 2-wire
  • Ethernet: 10/100Base-T
• USB / SD: USB host, USB client, and SD card slot available
• Environmental Notes:
  • Operating temperature: 0°C to 50°C
  • Humidity: 10% to 90% at 40°C, non-condensing
  • Front panel protection: approximately IP65 / NEMA 4

 

FAQ

Is NEC 136-551733-B-02 a PLC?
No. It is an HMI touch-panel display, not a PLC. It can communicate with a PLC, drive, or controller, but it does not replace controller logic by itself.Can I replace my HMI with any 10.4-inch 800×600 panel?
Not automatically. The replacement must support the same project file, communication ports, software version, and mounting dimensions. A physically similar HMI may still fail if the project or protocol does not match.I lost the original project file — can this unit still work?
It depends. If the project is stored inside the HMI and the unit still boots, the project may be recoverable. If the project is lost and the replacement unit is blank, you will need the original project file or a new configuration.What is the biggest installation risk?
Communication mismatch. The most common issue is not power — it is wrong COM port settings, baud rate, Ethernet IP, or project file version.Do I need to back up anything before replacement?
Yes. Back up the HMI project file, communication settings, IP address, COM port configuration, and any recipe or data logs if applicable.Can you guarantee this HMI will work in my machine?
No. Function can be verified under test conditions, but final compatibility depends on your project file, software version, communication settings, and connected equipment.What should I send for compatibility checking?
Send the full unit label, photos of the rear connectors, existing project file if available, software version, COM port wiring, Ethernet settings, and the model of the connected PLC or controller.