Siemens 1PH818, Operating Instructions & Installation Instructions

Page: 150 / 198

Service Instructions NFF
Stromag Dessau
IP 66
safety in motion
Electromagnetic Double Face Spring – Applied Brake
01.06.2009
9
For the mechanical release in case of emergency of the system use red marked screws (49)
which have to be removed of its position (coil body (1) – outer body (13) – brake flange (11)) (up
to size NFF 10 loosely attached) – up to size NFF 63-2 screws, up size NFF 100 –3 screws).
For release, unscrew the cap screws (50) from the coil body (1). In the now free holes, screw in
the release screws (49). The release is made by alternating clockwise turning of the screws until
the braking effect is cancelled.
Caution!
The emergency release is self-locking; for normal operation it must be re-turned into the initial
position, i.e. the screws (49) are re-turned counter-clockwise. Then re-screw the release screws
(49) into the original threaded hole (coil body (1) – outer body (13) – brake flange (11)). Then
screw the cap crews (50) into the coil body (1). We recommend to seal the threaded holes with
hylomar.
Take care that the seal rings (81) are also re-fitted. This is necessary to assure the full electrical
operation and
sealing effect (IP 66).
Manual emergency release shall not be used to maintain temporary operation!
4.4 Mechanical release by means of hand lever (optional)
By pulling the hand lever (4) at approx. 30° towards the back of the brake the armature disc (10)
is moved axially until it is lying against the coil body (1) thus the friction disc lining (2) may rotate
freely.
Manual emergency release shall not be used to maintain temporary operation!
4.5 Current supplies and electrical connections
Make sure that the electrical connection is performed by expert personnel taking into account
the installation regulations (such as DIN IEC 92).
The coil has been designed for 100% duty factor and connection to D.C. supply only, given on
the identification plate (residual ripple< 0.5).
According to DIN VDE 0580 the permanently admissible voltage change is +5% to –10% of the
nominal voltage.
To protect the coil or the power supply unit it is recommended to connect a varistor of the
corresponding operating A.C. voltage range and with the required power to the rectifier output.
5 Assembly and dismantling
(individual parts with Item-No. see chap. 4.1)
Caution! The brake must only be operated, maintained and repaired by accordingly
authorized, trained and instructed people. Each such person must have read and
understood the complete instruction manual and must have been informed in particular
about possible risks and danger.
150