Omron G9SP-N20S - Wiring the Power Supply

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Wiring Section 4-2
4-2-2 Wiring the Power Supply
Wiring the Power Supply
The G9SP-series Controller provides power terminals V1/G1 for the internal
and input circuits and power terminals V2/G2 for the output circuits.
Use a power supply with a voltage fluctuation range of 20.4 to 26.4 VDC.
• If the voltage may drop due to the starting current or inrush current for
output devices, use different power sources for the two power supplies.
• When using more than one G9SP-series Controller, use separate power
supply circuits for each G9SP-series Controller to prevent the malfunction
of breakers and voltage drops from inrush current.
Power Supply Selection
Use a DC power supply satisfying the following requirements.
• The secondary circuit of the DC power supply must be isolated from the
primary circuit by double insulation or reinforced insulation.
• An isolated power supply that is limited to a current of 8 A or lower must
be used.
• The output hold time must be 20 ms or longer.
• The DC power supply must be a SELV power supply that satisfies the
requirements of IEC/EN 60950-1 and EN 50178.
Power Supply Grounding
• Ground the 0-V side of the power supply terminals (G1 and G2) to enable
detecting faults for disconnected I/O wiring or ground faults.
• Ground to 100 Ω or less to provide stronger noise immunity.
• Do not share ground lines with other equipment or ground to structural
parts of buildings to prevent adverse influences.
Precautions for Safe Use
• Connect the positive and negative terminals correctly.
• Supply power to all of the Power Supply Units from the same source.
D+
D−
USB
Internal Circuit
Safety
Input
Circuit
Test
Output
Circuit
Safety
Output
Circuit
Standard
Output
Circuit
24 VDC
V1
G1
Si0
Si19
T0
T5
V2
G2
So0
So7
O0
O3
L
L
L
L