User`s manual

7-3
(2) Calculation of current consumption (by current consumption mark)
Add up the total numbers of the current consumption mark on stickers next to the model name
label.
One mark of current consumption means approx.100 mA.
Constitute a system in order to follow the below conditions:
Conditions: The total current consumption units, as shown by stickers on the modules receiving
power, must not exceed 35 when the JW-301PU, JW-22PU or JW-31PU are used
as the power supply module. The current consumption units must not exceed 45
when the JW-303PU power supply module is used. Please note: These current
consumption units are NOT amps, milliamps, etc.
The example below is calculated on the conditions that 5 sets of JW-3**CU control
modules, 2 sets of JW-15PG support tools, 6 sets of JW-31EA I/O bus expansion
adapters, and 5 sets of JW-32EA are used.
[Example] Calculation of the total current consumption in the system configiration below:
As shown above, a total of 43 current consumption is being drawn by the connected modules. This
figure exceeds the limit of 35 units when using the JW-301PU power supply module. Therefore,
another power supply module must be installed on the expansion rack panel.
(3) Calculation of current consumption (by calculating current consumption)
As the calculation example, calculate current consumption taking the system configuration in the
example of (2).
JW-3**CU · · · · · · · · · · · · · · · · · 0.5A
JW-15PG · · · · · · · · · · · · · · · · · 0.2A
JW-203N · · · · · · · · 0.04 x 8 = 0.32A
JW-211NA · · · · · · · 0.06 x 8 = 0.48A
JW-212SA · · · · · · · 0.06 x 8 = 0.48A
JW-232M · · · · · · · · 0.20 x 6 = 1.20A
Total 3.18A
No. of marks
JW-32**CU
JW-15PG
JW-203N · · · · · · · · · · · · · · · · · · · · 8
JW-211NA · · · · · · · · · · · · · · · · · · · 8
JW-212SA · · · · · · · · · · · · · · · · · · · 8
JW-232M · · · · · · · · · · · · · · · · · · · 12
Total 43
· · · · · · · · · · · · · · · 7
Shown here, the total current consumption is 3.18 amps. This figure is below the maximum output
current of 3.5 amps provided by the JW-301PU. And another power supply module is not required in
the expansion rack panel.
As indicated above, the total current consumption calculation method requires no more power supply
module, but the current consumption mark method requires another power supply module. Therefore,
get total current consumption using calculation method for determine system configuration. The mark
counting method gives only a rough estimate.
Power supply module: JW-301PU
Control module: JW-3**CU
Hand-held programmer: JW-15PG
Input module: JW-203N 8 sets
JW-211NA 8 sets
Output module: JW-212SA 8 sets
I/O module: JW-232M 6 sets