Electronic Alarms and Home Security Devices - DSC PC 500 comunication protocol

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Slipknot
12-18-03, 12:45 AM
i got a DSC pc 500 alarm and a PC500rk keypad , i wanna know how the comunication between the keypad and the alarm works ... i wanna know if anyone knows the comunication protocol between the keypad and the alarm .. the keypad (pc 500 rk) got 4 wire .. 2 of them are power suply . the other 2 i think is comunication between the keypad and the central ...

if anyonw know how this comunication protocol works . please answer me .. thanks

MrRonFL
12-18-03, 05:35 PM
The red and black wires are, indeed power and ground. The remaining two are the data bus wires. The coding that they use is propriatory, and DSC doesn't share that info. I do know that the keypads have to be the same model family as the control, for this brand, unlike others where the same keypad works for all models.