JHCTech ALAD-K1220T, User Manual, Page: 17 / 71

User’s Manual
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2.3.1 JP1/JP2:COM3/COM4 RS232 Power Select
Figure 2.10
JP1 (for COM 3) and JP2 (for COM 4) are used to configure Serial COM ports to pure RS232
or RS232 with power. The pin functions of Com 3 and COM 4 will vary according to JP1’s and
JP2’s setting respectively.
2.3.2 JP3: Power-on Select
JP3 is used to select the method of powering on the system. If you want the system to power-on whenever
AC power comes in, connect pins 2 and 3 of JP3. If you want to use the power button, connect pins 1 and
2 of JP3.