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3. SIGNALS AND WIRING
(3) Timing charts
(a) Servo-on command (from controller) ON/OFF
Tb [ms] after the servo-on is switched off, the servo lock is released and the servo motor coasts. If
the electromagnetic brake is made valid in the servo lock status, the brake life may be shorter.
Therefore, when using the electromagnetic brake in a vertical lift application or the like, set delay
time (Tb) to about the same as the electromagnetic brake operation delay time to prevent a drop.
Servo motor speed
Electromagnetic
brake interlock (MBR)
ON
OFF
Base circuit
Invalid(ON)
Valid(OFF)
ON
OFF
Servo-on command
(from controller)
Electromagnetic brake
operation delay time
Tb
Coasting
0 r/min
(60ms)
(80ms)
(b) Emergency stop command (from controller) or forced stop (EM1) ON/OFF
Servo motor speed
Electromagnetic
brake interlock (MBR)
ON
OFF
Base circuit
Invalid (ON)
Valid (OFF)
Emergency stop command
(from controller)
or
Forced stop (EM1)
(10ms)
(180ms)
(180ms)
Dynamic brake
Dynamic brake
Electromagnetic brake
Electromagnetic brake
Invalid (ON)
Valid (OFF)
Electromagnetic brake
operation delay time
Electromagnetic brake release