Yaskawa DR2 Sigma Servo - Manual (Page 43)

2.3 Connection and Wiring
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3) Form a power ON sequence as follows:
a) Form a power ON sequence so that the main power is turned OFF when a servo alarm
signal is output. (See the circuit diagram shown on the previous page.)
b) Hold down the power ON push-button for at least two seconds. The Servopack out-
puts a servo alarm signal for approximately two seconds or less when the power is
turned ON. This operation is required to initialize the Servopack.
Servo alarm (ALM) output signal
Power supply
NOTE D After turning the power OFF, do not touch the power terminals for 5 minutes. High voltage
may remain in the Servopack.
D Avoid frequently turning the power ON and OFF. Since the Servopack has a capacitor in
the power supply, a high charging current flows (for 0.2 second) when the power is turned
ON. Therefore, frequently turning the power ON and OFF causes the main power devices
(such as capacitors and fuses) to deteriorate, resulting in unexpected problems.
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