Pin 1 of the header is the SI connection, pin 4 is the SO connection. A silk-screened bar appears on the alarm board to suggest how to orient the header (so the header board is next to the silk-screened bar. It is possible to connect the header wrong, which causes the SI and SO connections to be swapped. Wire colors at the header are immaterial since the PC-LINK is sold as a small circuit board with a female header, and any other implementation could use arbitrary colors. This will not work with just a ordinary comm. Connect it so that the red wire is directly beside the 'SO' printed on the circuit board. The Pin red and yellow may be inverted, the pin number 1 is the red and in the table Device 2 is set as 4, the Mini-Molex has the pin 1 in the red wire location?Ĭonnect the Molex to the PC-Link connector on the alarm panels main board.
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