SIGMATEK TAE1941 Display Unit Replacement and Troubleshooting

SIGMATEK TAE1941 Touch Display Unit Replacement and Troubleshooting Guide

In the field of industrial automation, updating and upgrading human-machine interfaces (HMI) and display terminals are common tasks for equipment maintenance and upgrading. When the original display unit is discontinued, has insufficient resolution, or cannot meet new visualization requirements, it is crucial to choose a compatible, easy to install, and reliable alternative product. SIGMATEK TAE 1941, as a 19 inch SXGA touch display unit, is an ideal choice for replacing old display terminals due to its high resolution, LED backlight, HMI Link G2 remote connection capability, and design that adapts to harsh industrial environments. This article will delve into the replacement selection, installation and debugging, troubleshooting, and maintenance points of TAE 1941, providing engineers with a practical technical guide.

Overview of Technical Characteristics of TAE 1941

TAE 1941 is a 19 inch TFT color display unit with a resolution of SXGA 1280 x 1024 pixels, a color depth of 24 bits (16777216 colors), a typical brightness of 300 cd/m ², and a typical contrast ratio of 2000:1. Its display angle is excellent, with a left to right and up to down angle of 89 degrees. The backlight adopts LED, and after running for 50000 hours at an ambient temperature of 25 ° C, the brightness decays to 50% of the original value. The touch screen adopts an analog resistive glass touch panel with an effective area of 376.3 x 301.1mm, serving as the input medium for process data and parameters.

In terms of interfaces, TAE 1941 provides one USB 2.0 Type-A (X5) on the front panel and one USB 2.0 Type-A (X4) on the back panel. The core communication interface is HMI Remote IN (HMI Link G2), using RJ45 connectors. The power supply voltage is+24V DC (+18-30V DC), with a typical current consumption of 1.45A (at 24V) and a maximum of 2A. The external dimensions are 462 x 360 x 57mm, and the weight including the installation bracket is about 7kg. In terms of environmental adaptability, the working temperature is 0 to+50 ° C, the storage temperature is -20 to+60 ° C, and the humidity is 10-90% without condensation. EMC complies with EN 61000-6-2 (industrial zone immunity) and EN 61000-6-4 (noise emission). Vibration resistance complies with EN 60068-2-6, 9-200Hz amplitude 3.5mm/1g. The impact resistance complies with EN 60068-2-27, 15g (150m/s ²), lasting for 11ms. The protection level complies with EN 60529: front panel IP54, cover plate IP20. Product code 12-200-1941, hardware version 1. x.

Replacement selection and compatibility evaluation

When deciding to replace the existing display unit with TAE 1941, engineers need to evaluate the following aspects:

1. HMI Link G2 compatibility check

This is the most crucial step in replacement selection. TAE 1941 is a pure display terminal that does not come with a processor and must be connected to the PC through HMI Link G2. The PC side needs to be equipped with SIGMATEK second-generation HMI Link (G2) module, which processes display and USB signals and transmits them to the terminal through standard Ethernet cables (CAT-5e or CAT-6). Therefore, it is necessary to confirm whether the existing control system supports HMI Link G2 before replacement.

It should be noted that the first and second generations of HMI Link devices are incompatible, and G2 devices can only be used in conjunction with remote terminals of the same system family. If the original system uses the first generation HMI Link, it cannot be directly replaced with TAE 1941, and the HMI Link module on the PC side needs to be synchronously upgraded. In addition, if the resolution of the replaced display terminal is different from the original device, the PC must be restarted after replacing the device during operation in order for the system to correctly recognize and initialize the new device.

2. Power supply and power demand assessment

TAE 1941 requires an independent+24V DC power supply, with a typical current of 1.45A and a maximum of 2A. The power supply is connected through the X1 interface (4-pin Phoenix RM 3.5) on the rear panel. When replacing, it is necessary to confirm whether there is sufficient 24V power capacity inside the control cabinet. When used for internal capacitor charging, power consumption may increase in microseconds, depending on the input voltage and power impedance. Therefore, it is recommended that the power supply has a certain margin.

3. Evaluation of mechanical dimensions and installation methods

The external dimensions of TAE 1941 are 462 x 360 x 57mm (height x width x depth), and the installation dimensions are 422 x 320mm. When replacing, it is necessary to confirm whether the original control cabinet openings match. The installation bracket is included in the delivery scope. If there is a slight difference in the original hole size, it may be necessary to reprocess or use an adapter plate.

4. Environmental and chemical tolerance assessment

Confirm that the working temperature is within the range of 0-50 ° C and the humidity is not condensing. Touchscreens are resistant to various chemicals, including coal tar/toluene, trichloroethylene, acetone, alcohol, gasoline, engine oil, ammonia, glass cleaner, mayonnaise, tomato sauce, wine, salad oil, vinegar, etc., and have no visual impact. However, the ASA casing still needs to avoid contact with highly corrosive chemicals during replacement installation.