pete_c
Guru
The CM11A and the TW523 are two totally different X10 PIMs.
I utilize both for automation and the TW523 XTB Volp dual phase emulator for my OmniPro panel.
Thinking that the CM11A uses RS232 while the TW523 is TTL.
From a post here on Cocoontech.
the CM11A is a serial (RS-232) device, while a TW-523 is a TTL-logic level device that uses direct hardware timing, and has no relation to anything resembling a serial data stream, baud rate, or other protocol. It outputs a two level square wave indicating the zero crossing of the power line, and the other two signals indicate (or enable) a signal to control a burst of 120 kHz signal on the power line.
I utilize both for automation and the TW523 XTB Volp dual phase emulator for my OmniPro panel.
Thinking that the CM11A uses RS232 while the TW523 is TTL.
From a post here on Cocoontech.
the CM11A is a serial (RS-232) device, while a TW-523 is a TTL-logic level device that uses direct hardware timing, and has no relation to anything resembling a serial data stream, baud rate, or other protocol. It outputs a two level square wave indicating the zero crossing of the power line, and the other two signals indicate (or enable) a signal to control a burst of 120 kHz signal on the power line.