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Control circuit
44
INSTALLATION AND WIRING
2.6.7 When supplying 24 V external power to the
control circuit
Connect the 24 V external power supply across terminals +24 and SD. The 24 V external power supply enables I/O
terminal ON/OFF operation, operation panel displays, control functions, and communication during communication
operation even during power-OFF of inverter's main circuit power supply. When the main circuit power supply is turned
ON, the power supply changes from the 24 V external power supply to the main circuit power supply.
Specification of the applied 24 V external power supply
Commercially available products (as of October 2013)
Starting and stopping the 24 V external power supply operation
• Supplying 24 V external power while the main circuit power is OFF starts the 24 V external power supply operation.
Likewise, turning OFF the main circuit power while supplying 24 V external power starts the 24 V external power supply
operation.
• Turning ON the main circuit power stops the 24 V external power supply operation and enables the normal operation.
NOTE
• When the 24 V external power is supplied while the main circuit power supply is OFF, the inverter operation is disabled.
• In the initial setting, when the main power supply is turned ON during the 24 V external power supply operation, a reset is
performed in the inverter, then the power supply changes to the main circuit power supply. (The reset can be disabled using
Pr.30.)
Confirming the 24 V external power supply input
• During the 24 V external power supply operation, "EV" flickers on the operation panel. The alarm lamp also flickers. Thus,
the 24 V external power supply operation can be confirmed even when the operation panel is removed.
• During the 24 V external power supply operation, the 24 V external power supply operation signal (EV) is output. To use the
EV signal, set "68 (positive logic) or 168 (negative logic)" in one of Pr.190 to Pr.196 (output terminal function selection)
to assign function to an output terminal.
Item Rate Specification
Input voltage DC23 to 25.5 V
Input current 1.4 A or lower
Model Manufacturer
S8JX-N05024C
Specifications: Capacity 50 W, output voltage 24 VDC, output current 2.1 A
Installation method: Front installation with cover
or
S8VS-06024
Specifications: Capacity 60 W, output voltage 24 VDC, output current 2.5 A
Installation method: DIN rail installation
For the latest information about OMRON power supply, contact OMRON corporation.
OMRON Corporation
POWER ALARM
Flickering
Flickering