Operating Instructions BA 77 600..A00 // Last updated: 13/03/2020 // Page 19 of 33
Attention!
Check that the brake has been connected in accordance with the specifications provided on the rating plate
before it is put into operation. Even short-term operation outside the specified supply voltage limits may cause
irreversible damage to the brake or electronic accessories. Such damage may not be apparent immediately.
DC side brake switching without protective circuit as described in Section 3.4 will cause damage to electronic
rectifiers, electronic accessories, switching contacts and to the field coil (1.2).
3.5.2 Manual brake release
The spring-applied single-disc brake can be released "manually" by means of a mechanical hand release (21)
(accessories). In case of failure of the regular power supply, it is also possible to use a commercial UPS (e.g.
UPS battery system) for the electrical release of the brake. For this purpose, the brake user is required to
install a UPS system that complies with the voltage specifications given on the brake rating plate.
Warning!
Manual release (inching mode) of the spring-applied single-disc brake (e.g. for maintenance operations on the
machine (e.g. motor) or in case of failure of the regular power supply and use of a UPS system) must be
performed with extreme caution. If the drive system is unbalanced, the load torque may accelerate the drive.
The brake user is required to take adequate precautions to ensure that no hazardous situations are caused by
the load torque when the brake is released and engaged in inching mode.
3.6 M
2
rated torque adjustments
The brakes are factory-adjusted to the M
2
rated torque (as specified in the purchase
order). The M
2
rated torque is specified on the rating plate (16) of the brake. The
adjusting ring clearance b
3
is marked on the collar of the brake back near the set screw
(8). It can be changed by tightening or loosening the adjusting ring (7) by means of a
pin spanner. The corresponding changes in the M
2
rated torque are specified in Table
19/1. The adjusting ring clearance b
3
must remain within the specified minimum and
maximum values (see Table 19/1).
Size
10
11
13
16
19
24
∆
M
2
/mm [Nm]
3.8
3.3
11.5
9.25
12
49
b
3min
[mm]
2
3.6
3
4.7
4.5
2.7
b
3max
[mm]
3.3
6.2
4.7
8.6
11
5.6
Table 19/1: Change in the M
2
rated torque from 1 mm axial adjustment of the
adjusting ring (7); adjusting ring clearance b
3
limit values
Attention!
After having tightened or loosened the adjusting ring (7), the ring (7) must be locked with the set screw (8).
The tightening torque to be applied is M
A
= 3Nm. The adjusting ring (7) must be turned in such a way that the
set screw (8) can be inserted between the studs (4).
Adjusting ring
clearance
Summary of Contents for 7760016A00-0004
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