User`s manual

7-4

7-2 How to calculate the heat value (average power

consumption) of the JW300 when designing panels.

Obtain the average power consumption of the entire JW300 system following the calculations below,

and calculate temperature inside a panel.

1) Power supply module.

Wpw = x (I5V x 5) (W)

I5V: Current consumption of 5 VDC circuit of respective module.

2) Tatal comsumption electric power of respective module. (5 VDC)

W5V = I5V x 5 (W)

3) Average consumption electric power of total 24 VDC power supply of output module. (Power

consumption for simultaneous ON points)

W24V = I24V x 24 (W)

4) Average power consumption by output module drop voltage of output module. (Power consumption

for simultaneous ON points)

Wour = Iour x Vdrop x No. of output points x Simultaneous ON rate (W)

Iour: Output current (current of use) (A)

Vdrop: Drop voltage of respective output module. (V)

5) Input module average power consumption of input module. (Power consumption for simultaneous ON

points)

- In case of DC input

WIN = IIN x E x No. of input points x Simultaneous ON rate (W)

- In case of AC input

WIN = 0.1 x IIN x E x No. of input points x Simultaneous ON rate (W)

IIN = Input current (Rms value in the case of AC) (A)

E = Input voltage (Voltage of use) (V)

6) Consumption electric power of special function module.

WS = I5V x 5 + I24V x 24 (W)

The total of the power consumptions calculated in each module is the power consumption of the entire

machine. From this entire power consumption (W), calculate the heat generation and temperature rise

in the panel.