Mayr ROBA-stop-Z Instructions De Montage Et De Mise En Service page 20

Installation and Operating Instruction for ROBA-stop -Z
Dual Circuit Fail Safe Brake Type 892.10_.0
Sizes 60 – 2000
Table 6: Maximum switch capacity micro switch
sizes 60 - 125
AC switch capacity
Voltage Resistance load
[VAC] [A/R ]
load
125 5
250 5
- -
Minimum switch capacity: 0,12 VA (>12V, >10mA)
Contact material: silver
Table 7: Maximum switch capacity micro switch
sizes 250 - 2000
AC switch capacity
Voltage Resistance load
[VAC] [A/R ]
load
230 1,5
Minimum switch capacity: 0,12 VA (>12V, >10mA)
Contact material: silver
Table 8:
Measuring stripe "Z"and
number of distance sleeves
Brake Dim. "Z"
size [mm] distance sleeves (pos.7)
60 0,4
125 0,4
250 0,5
500 0,5
1000 0,6
2000 0,6
Breakdowns:
Failures
Brake does not release
Brake engages with delay in
case of Emergency stop.
Chr. Mayr GmbH + Co. KG
Eichenstraße 1
D-87665 Mauerstetten
Germany
DC switch capacity
Voltage Resistance load
[VDC] [A/R ]
load
bis 30 5
125 0,5
250 0,25
DC switch capacity
Voltage Resistance load
[VDC] [A/R ]
load
60 0,5
24 2
Number of
3
3
3
3
3
3
Possible reasons
False voltage measured at the rectifier
£
ROBA -switch fast acting rectifier failed
£
Air gap too big (rotor worn down)
£
Coil interrupted
£
Brake is switched to AC side
£
Telephone 08341/804-241+242
Telefax 08341/804-422
http://www.mayr.de
E-Mail:
Page 10 of 10
Maintenance
® ® ® ®
ROBA-stop -Z dual circuit fail safe brakes are virtually
maintenance free.
The friction lining is robust and wear resistant ensuring that a
long service life of the brake is obtained.
The friction lining, however, is a wearing item, and in the case of
emergency OFF braking actions, the following inspections should
be made at regular periods as below
Inspection of the braking torque or deceleration
£
(inspection brake circuit separately (Fig. 2 and Table 2)).
Inspection of the nominal air gap or limiting air gap
£
respectively (Fig. 3 and Table 2).
The intervals for inspection are to be determined according
to the application by the customer, or to be carried out with
the TÜV inspection the latest.
The inspection of the wearing condition of the rotors 1 and 2
(pos. 5+6) is made by checking the air gap "a" (Fig. 3 and
Table 2).
If the limiting air gap is achieved, the rotors must be exchanged.
Exchange of the rotors 1 and 2 (pos. 5+6):
Before exchanging the rotors (pos. 5 + 6)
•
Clean brake, remove abrasive dust with the aid of air
pressure.
•
Check thickness of rotor "new", (acc. to Table 3).
Exchange of the rotors (pos. 5+6)
The exchange of the rotors is made in the opposite sequence of
the brake assembly.
Remove
Apply correct voltage
£
Exchange ROBA -switch fast acting rectifier
£
Exchange lining carrier
£
Exchange brake
£
Switch to DC side
£
info@mayr.de
(B.8.2.0.GB)
Attention!
In case of hoisting drives the drive brake
must be free of any load. Otherwise there
is the risk of the load falling!
15/05/2003 TK/Kr