ABB PP877K-3BSE069274R1 Operation display panel

ABB PP877K-3BSE069274R1 Operation display panel

Touch screen, also known as “touch screen” and “touch panel”, is an inductive liquid crystal display device that can receive input signals such as contacts. When touching the graphic buttons on the screen, the touch feedback system on the screen can drive various connecting devices according to the pre programmed program, which can replace the mechanical button panel, and create dynamic audio-visual effects by using the liquid crystal display screen. As a new computer input device, touch screen is the most simple, convenient and natural human-computer interaction mode. It gives multimedia a new look and is an attractive new multimedia interactive device. No need to learn, everyone can use it, which is the biggest magic of the touch screen. Neither the keyboard nor the mouse can compare with it. The touch screen is mainly used for public information query, leadership office, industrial control, military command, electronic games, song and dish ordering, multimedia teaching, real estate pre-sale, etc.

The input voltage range is 18 to 30V DC, and the input current is 6 mA at 24V. The inputs are divided into two independent isolated groups, each with eight channels and a voltage monitoring input. Each input channel is composed of current limiting element, EMC protection element, input status indication LED and optical barrier. If the voltage disappears, the process voltage monitoring input will send a channel error signal. Error signals can be read via the module bus. For local nodes, the reflective memory board is displayed as shared memory. Any level of software (including the application itself) can write data to or read data from memory. The data written to the reflective memory of one node is transmitted by the network hardware to all other nodes and placed in the same address on the reflective memory board of these nodes. This data transmission can be completed without the participation of the processor on any node. With this system, all nodes on the network have local copies of shared data that can be accessed immediately.

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