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09.00
Holding brake
A holding brake holds the axis, without play, at standstill or in the no–voltage
(option)
condition (powered–down).
The permanent magnet, single–disk brake operates according to the fail–safe
principle, i.e. the brake is closed (applied) when it is not energized.
Note
Axial forces are not permitted for motors equipped with a holding brake!
The holding brake is not a working brake!
For emergency stopping or during power failures, approx. 2000 braking opera-
tions can be made with the specified maximum switching work (refer to the
technical data)
( W=1/2 * J
without the brake being subject to excessive wear.
The specified holding torques are only valid at standstill. For slipping brakes,
the dynamic braking torques always apply (refer to the technical data).
1FT6 motors with integrated holding brakes are longer.
Supply voltage: 24 V DC "10 %
In order to prevent overvoltages when switching–off, and the associated effects
on the system environment, the brake feeder cable must be externally provided
with a free–wheeling diode or a matching varistor (a varistor is the preferred
solution, as the closing time is extended when a free–wheeling diode is used
Siemens AG 2000 All rights reserved
SIMODRIVE Planning Guide Motors (PJM) – 11.00 Edition
General Information on AC Servomotors
2.2 Mounted/integrated components
* ω
2
2
;
Jtot in [kgm
tot
6SN1197–0AA20
ω in
],
[1/s],
W in [J] )
ALS
).
ALS/2-27
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