228-90095F
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7.2.12 Changing the power supply input voltage
On SPD-20A and SPD-20AV models, the power supply input voltage is
switched by turning a rotary power supply input voltage switch to the
desired input voltage. However, always disconnect the power supply plug
before performing this procedure. Also, be sure to replace the fuse if the
power supply input voltage setting has been changed.
• 100-120V input Fuse 4AT, 250V P/N:072-02004-22
• 220-240V input Fuse 3.15AT, 250V P/N:072-02004-21
(1) Open the fuse holder with a flat head screwdriver.
(2) Turn the rotary power supply voltage switch to the desired supply
voltage.
(Alternatively, the rotary switch may be removed, set to the desired
power supply setting and reattached.)