Power Supply Confirmation; Replacement Notification - Omron CJ - 09-2009 Operation Manual

Power Supply Units
3-4-4

Power Supply Confirmation

Condition 1:
Current Requirements
Condition 2:
Power Requirements
3-4-5

Replacement Notification

Principle of Replacement Notification
After determining what power supply voltage is required, whether power out-
put terminals and a RUN output are required, and whether replacement notifi-
cation is required, calculate the current and power requirements for each
Rack.
There are two voltage groups for internal power consumption: 5 V DC and
24 V DC.
Current Consumption at 5 V DC (Internal Logic Power Supply)
The following table shows the current that can be supplied to Units (including
the CPU Unit) that use 5-V DC power.
Power Supply Unit
CJ1W-PA205R/PA205C
CJ1W-PA202
CJ1W-PA025
CJ1W-PA022
Current Consumption at 24 V DC (Relay Driving Power Supply)
The following table shows the current that can be supplied to Units that use
24-V DC power.
Power Supply Unit
CJ1W-PA205R/PA205C
CJ1W-PA202
CJ1W-PA025
CJ1W-PA022
The following table shows the maximum total power that can be supplied at
5 V DC and 24 V DC.
Power Supply Unit
CJ1W-PA205R/PA205C
CJ1W-PA202
CJ1W-PA025
CJ1W-PA022
Refer to 2-6 Unit Current Consumption for tables showing the current con-
sumed by each particular Unit as well as example calculations.
The Power Supply Unit has a built-in electrolytic capacitor. The electrolytic
capacitor is impregnated with electrolytic solution that starts to penetrate the
sealing rubber from the time of manufacture. As time elapses, the internal
electrolytic solution continues to evaporate, resulting in decreased electro-
static capacity and deterioration in other characteristics. Over time, the char-
acteristic deterioration of the electrolytic capacitor prevents the Power Supply
Unit from being utilized to its full capacity. In particular, the speed at which the
electrolytic capacitor deteriorates fluctuates greatly with the ambient tempera-
ture (generally, a temperature rise of 10°C will double the rate of a reaction, as
stated by Arrhenius' law).
The CJ1W-PA205C Power Supply Unit with Replacement Notification moni-
tors the internal temperature of the Power Supply Unit while the power is
Maximum current at 5 V DC
5.0 A
2.8 A
5.0 A
2.0 A
Maximum current at 24 V DC
0.8 A
0.4 A
0.8 A
0.4 A
Maximum total power output
25 W
14 W
25 W
19.6 W
Section 3-4
175