Instruction manual

3 - 10
3. SIGNALS AND WIRING
3.5.2 Explanation of signals
Abbreviation Signal Name Description
P24M Main circuit power input Power supply for main circuit.
P24G Power ground
Main circuit power supply and control circuit power supply ground. Connected
to SG and LG inside the unit.
P24L Control circuit power input
Control circuit power supply and digital I/O power supply. Always use a
stabilizing power supply.
Ground Connect to the earth of the control box for grounding.
3.5.3 Power-on sequence
(1) Power-on procedure
1) Always wire the power supply as shown in above Section 3.5.1 using the relay with the main circuit
power supply. Configure up an external sequence to switch off the relay as soon as an alarm occurs.
2) Switch on the control circuit power supply L
11
, L
21
simultaneously with the main circuit power
supply or before switching on the main circuit power supply. If the main circuit power supply is not
on, the display shows the corresponding warning. However, by switching on the main circuit power
supply, the warning disappears and the servo amplifier will operate properly.
3) The servo amplifier can accept the servo-on command about 1s after the main circuit power supply
is switched on. Therefore, when SON is switched on simultaneously with the 24V power supply, the
base circuit will switch on in about 1s, making the servo amplifier ready to operate. (Refer to
paragraph (2) in this section.)
(2) Timing chart
ON
OFF
ON
OFF
Power supply (24VDC)
Base circuit
ON
OFF
Servo-on command
(from controller)
10ms 60ms
1s
SON accepted