Chapter 4 Installing Hardware and Wiring
4-25
Connecting a DC power cable
VS+
VS-
NC
FG
FE
24G
+24V
PS15 CPU530 06XA
UP
ZP
P/S
24V
0V
*1
P/S
24V
0V
LG
Control box
Functional ground *2
*1. 24V on the external power supply is connected to VS+ and VS- on the power supply module. VS+ and
VS- can be used to detect whether the voltage of the external power supply is stable.
*2. FG on the power supply module is connected to the control box as the functional ground.
*3. +24V and 24G on the power supply module are connected to 24V and 0V on the DC power supply. To
prevent the system from becoming abnormal, the ground of the DC power supply has to be connected
to FE on the power supply module.
The power input of AHPS15-5A is the DC input. Users have to pay attention to the following points when they
use AHPS15-5A.
In order to ensure that the external power supply stably provides 24 VDC power, the external power
supply can be connected to VS+ and VS-. If the PLC detects that the voltage of the external power supply
is lower than the working voltage, users can write a protective program.
The length of the cable connecting with the ground should be more than 1.6 millimeters.
If the power cut lasts for less than 10 milliseconds, the PLC keeps running without being affected. If the
power cut lasts for long, or if the voltage of the power supply decreases, the PLC stops running, and there
is no output. When the power supply returns to normal, the PLC resumes. (Users have to notice that there
are latched auxiliary relays and registers in the PLC when they write the program.)
Please use single-core cables or multicore cables. The diameters of the cables used should be in the
range of 12 AWG to 22 AWG. The torque applied to the terminal screws should be 9.50 kg-cm (8.25 Ib-in).
Please use copper conducting wires. The temperature of the copper conductive cables should be
60/75°C.
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