Using the external DC power supply
21
Using the external DC power supply
<DC IN> terminal
DC cable
External DC power supply
1
Connect the <DC IN> terminal of the unit with the external DC power supply.
2
Turn on the <POWER> switch on the external DC power supply (when there is a <POWER> switch on the external DC power
supply).
3
Turn on the power of the unit.
r
External DC power supply
Confirm that the output voltage of the external DC power supply is compatible with the rated voltage for this unit before connecting.
Select the output current of the external DC power supply that is above the total current of the connected device with sufficient allowance.
An inrush current is generated when the power of this unit is turned on. Insufficient power supply performance while turning on the power may cause failure. It is
recommended to use the external DC power supply that can secure double or more of the total power consumption of this unit. Use 2-wire shielded cable with
cable core of AWG18 (nominal cross-section area of 0.824 mm
2
) or higher as the DC cable.
f
Confirm the pin assignments of the DC output terminal of the external DC power supply and the <DC IN> terminal of this unit, and connect with correct
polarity.
Connecting
+
12 V power supply to the GND terminal by mistake may cause fire or failure.
DC IN
1
2
3
4
1
UNREG GND
2
Not used
3
Not used
4
+
12 V
HA16RA-4P(77) (Hirose Electric Co.)
