Habey BIS-6650 - Manual (Page 13)

2.4.2 Hardware Switch for SystemAuto Boot Upon Power On（JAT）
JAT：
Setting JAT
Open Disable this auto boot function
Close Enable this auto boot function
2.4.3 COM2 Jumper Setting（J1, J2）
J1, J2 jumpers are used to configure COM2 transmission mode. COM2 supports
RS232/RS485. Default mode as RS232.
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