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H 5 - 1
Chapter 5 Power Supply Wiring, Power Consumption
Calculation, and Power Sequence Requirements
FB
S
-PLC internally has three kinds of circuit: a 5VDC logic circuit, a 24VDC driver circuit (driver output devices, for
example: relay, transistor, and etc), and a 24VDC input circuit. Only the 5VDC logic circuit and 24VDC output circuit
are powered by the built-in power supply for main/expansion units or powered by expansion power supply modules
(FBs-EPW-AC, FBs-EPW-D24), and the 24VDC input circuit can be choose to powered by the external power supply
or the built-in power supply of main/expansion units or 24VDC sensor of FBs-EPW-AC/D12/D24. Expansion modules
other than main/expansion units do not contain any power supply and are powered by the power supply inside the
main/expansion units or expansion power supply (FB
S
-EPW-AC, FBs-EPW-D24). Main/expansion units or expansion
power supply with their model numbers suffixed with “-D12/-D24” means is operated by DC power source. Otherwise,
AC power source is used.
Caution
In industrial environments, main power may irregularly experience a surge current or high voltage pulse
caused by the start or shut down of high power equipment. Users are advised to take necessary
measures (for example, the use of isolation transformer or other MOV suppression devices) for the
protection of PLC and its peripherals.
5.1
Specifications and Wiring of AC Power Sourced Power Supply
The available AC power supplies of FB
S
-PLC are the 14 Watt (SPW14-AC) supply for 10/14 PTs main unit, the 24 Watt
(SPW24-AC) supply for 20~60PTs main/expansion unit, and the 14 Watt expansion supply (FB
S
-EPW-AC) for
expansion modules. Except that the FB
S
-EPW-AC is an independent module, SPW14-AC and SPW24-AC are to be
installed on a main unit or inside an expansion unit, where their appearances are invisible. The following table lists the
specifications:
Model
Item
SPW14-AC
SPW24-AC
FB
S
-EPW-AC
Input Range
Voltage
100 ~ 240VAC, -15% / +10%
Frequency
50 / 60HZ
±
5%
Max. Power Consumption
21W / 14W
36W / 24W
21W / 14W
Inrush Current
20A@264VAC
Allowable Power Interrupt
<
20ms
Fuse Spec.
2A
,
250V
Isolation Type
Transformer/Photocouple Isolation, 1500VAC/minute
Power*
1
Out
put
5VDC (logic circuit)
N/A*
2
5V,
±
5%, 1A(max)
5V,
±
5%, 0.4A(max)
24VDC
(output circuit)
24V
±
10%, 200mA(max)*
3
24V,
±
10%, 400mA(max)
24V,
±
1%, 250mA(max)
24VDC (input circuit)
24V,
±
10%, 400mA(max)
24V,
±
10%, 400mA(max)
24V,
±
10%, 250mA(max)
Note *
1
:
The 5VDC (for logic circuit) output power and the 24VDC (for output circuit) power can be accessed from the “I/O expansion
output header” located on the right side of the main/expansion units for expansion modules. And the 5VDC power is also
used by communication board (CBxx) or communication module (CMxx). The 24VDC power for input circuits is provided
from the farthest 2 upper left terminals (labeled “+24V OUT-”) on the input terminal block of main/expansion unit to input
circuit in expansion module or other sensors.
Sp e c