– B47 –
– B46 –
8. Built-in Holding Brake
9. Dynamic Brake
Permissible
total work
x 10
3
J
Permissible
work (J) per
one braking
Releasing
voltage
Exciting
current
DC A
(at cool-off)
Releasing
time
ms*
Engaging
time
ms
Rotor
inertia
x 10
–4
kg
•
m
2
Static
friction
torque
N
•
m
Motor
output
Motor
series
780
1470
2156
2450
2940
784
1470
2940
784
2940
1470
2156
1470
2940
588
1176
1470
1078
1372
588
1176
1372
588
1372
1470
1176
1372
DC2V
or more
0.59
0.79
0.90
1.10
1.30
0.59
0.79
1.30
0.59
0.83
0.75
0.79
1.3
1.4
70 (200)
or less
50 (130)
or less
35 (150)
or less
25 (200)
or less
70 (200)
or less
50 (130)
or less
25 (200)
or less
70 (200)
or less
35 (150)
or less
100 (450)
or less
50 (130)
or less
25 (200)
or less
50 (130)
or less
MDMA
MHMA
MFMA
MGMA
1.0kW
1.5kW, 2.0kW
3.0kW
4.0kW
5.0kW
500W, 1.0kW
1.5kW
2.0kW to 5.0kW
400W
1.5kW
2.5kW
4.5kW
900W
2.0kW
3.0kW, 4.5kW
4.9 or more
13.7 or more
16.1 or more
21.5 or more
24.5 or more
4.9 or more
13.7 or more
24.5 or more
4.9 or more
7.8 or more
21.6 or more
31.4 or more
13.7 or more
24.5 or more
58.8 or more
1.35
4.25
4.7
1.35
4.7
1.35
4.7
8.75
1.35
4.7
80 or less
100 or less
110 or less
90 or less
80 or less
100 or less
80 or less
150 or less
100 or less
80 or less
150 or less
• Excitation voltage is DC24V±10%.
• Values represent the ones with DC-cutoff using a surge absorber for holding brake.
Values in ( ) represent those measured by using a diode (V03C by Renesas Technol-
ogy Corp.).
• Above values (except static friction torque, releasing voltage and excitation current)
represent typical values.
• Backlash of the built-in holding brake is kept ±1˚o r smaller at ex-factory point.
• Permissible angular acceleration : 30000rad/s
2
for MAMA series
10000rad/s
2
for MSMD, MQMA, MSMA MDMA,MHMA MFMA and MGMA series
• Service life of the number of acceleration/deceleration with the above permissible
angular acceleration is more than 10 million times.
(Life end is defined as when the brake backlash drastically changes.)
This driver is equipped with a dynamic brake for emergency stop.
Pay a special attention to the followings.
<Caution>
1.Dynamic brake is only for emergency stop.
Do not start/stop the motor by turning on/off the Servo-ON signal (SRV-ON).
Or it may damage the dynamic brake circuit of the driver.
The motor becomes a dynamo when driven externally, and shorting current
runs while this dynamic brake is activated and might cause smoking or fire.
2. Dynamic brake is a short-duration rating, and designed for only emergency stop. Al-
low approx. 3 minutes pause when the dynamic brake is activated during high-speed
running.
• You can activate the dynamic brake in the following cases.
1) when the main power is turned off
2) at Servo-OFF
3) when one of the protective function is activated.
4) when over-travel inhibit input (CWL, CCWL) of CN X5 is activated
In the above cases from 1) to 4), you can select either activation of the dynamic
brake or making the motor free-run during deceleration or after the stop, with pa-
rameter.
Note that when the control power is off, the dynamic brake will be kept activated.
