The 8520-CRTM is a control’s monitor screen for the 9/series CNC machines manufactured by Allen Bradley. It is a mounted color panel with a display terminal of either 9 inches in monochrome CRT or 12 inches in color CRT. The 8520-CRTM uses 12 Volts of DC for the monochrome display module, while the color CRT receives 112 Volts from the main power supply. The color CRTM has an additional internal power supply in AC, which is used to power the CRTM. Cable C03 (the AC power supply cable) provides AC power to the sub terminal on the rear of the CRTM. This AC power supply helps to jumper internally to the color CRTM display from the operator panel’s supply. The 8520-CRTM is mounted color panel that is typically mounted directly in a cabinet and is fixed in its location. It contains its own power and is directly linked to a 9/series fiber optic ring. From the main processor to the CRTM, the video signal is directly connected through a cable. The operator panel interface assembly provides power to the CRTM and to a keyboard interface with the fiber optic ring.
The intensity of the CRTM is controlled by adjusting the contrast on the system. It is recommended that none of the brightness settings be modified, as brightness controls are preset at the factory for optimum monitor performance and reliability. The 8520-CRTM is a display device for a CNC machine. This display provides instant feedback by showing text and graphic images at work, and it displays error messages. In 9/series CNC machines when sending commands to the application software, the block number (an ASCII number of 5 Strings) is displayed on the control’s operator CRTM. When the CNC machine’s application software responds by ending the transmission of error messages to the teach pendant, this is also displayed on the CRTM. This function will send a message every time it is toggling on the CRTM. The 8520-CRTM in total can display the system application controls, error messages, and system messages.
Repair Services for 8520-CRTM
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Our highly skilled technicians can repair your 8520-CRTM. All of our repairs come with a 1 Year DO Supply Warranty. Please contact us for additional information about our repair process.
Revisions for 8520-CRTM
Please refer to the manual for more information about the 8520-CRTM such as the wiring diagrams, data sheets,
firmware information and migration or obsolescence details.
|Revision Part #
||Also Known as
||8520-CRTM/A, Series A, Rev A