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Global Brake Series
MI 850A169 1 L
Page 6 of 14
5. Attach a torque arm between the extension bolt(s)
and the machine frame with a “loose” or “floating” mount to
prevent binding forces on the brake bearings. The torque arm will prevent the rotation of the brake stators.
Tighten the mounting bolts to the torque specified in table 2.
lb-in
N-m
GBA
30
3.4
GBB
30
3.4
GBC
51
5.8
GBD
124
14
GBE
249
28.1
GBF
860
97.2
T
able 2. Mounting Bolt Tightening Torque
CAUTION
– Damage to the fan on blower models can result from the shaft extending past the end of
the brake and hitting the fan blades. On blower models ensure the shaft does not extend past the end
of the brake.
ELECTRICAL INSTALLATION
WARNING
– Death or injury can result from electric shocks.
Installation of the brake device must be performed when there is no electrical power in the system.
Never break the electrical connection to the device with a switch or similar component while the brake
device is energized. The inductive voltage generated by breaking the current flow may breakdown the
coil insulation system and may pose a shock hazard. Destruction of the electronics of the power
amplifier or control unit may also occur.
Never place electrical cables under mechanical strain. Always route wiring in either flexible or rigid
conduit.
Protection class 1: Protection class 1 is based on an intact basic insulation and when all conductive parts are
connected to the PE (Protective Earth) conductor on the permanent installation.
All wiring must comply with the essential requirements of the appropriate standard(s) and is the responsibility of
the installer.
Wiring to the brake and blower kit must be insulated copper wire with a temperature rating of at least 105
⁰
C. The
wire size should be 0.52 or 0.82 mm
2
(20 or 18 AWG).
The tightening torque for the terminals is 0.4 N-m (3.5 lb-in).
For both 24 VDC and 90 VDC devices:
1. Mount a conduit fitting in one of the junction box knock-outs.
2. Connect DC (direct current) power source to the terminals marked 1 and 2.
3. Connect the protective grounding circuit to the terminal marked with the P.E. symbol.
WARNING
– Death or injury can result from electric shocks.
Protect against electric shocks by installing a conductive connection between the terminal marked with
the PE symbol on the brake device and the PE circuit of the building or machine.
4. Connect the appropriate AC (alternating current) power source to the terminals marked 1 and 2 of the blower
if it exists.
5. Connect the protective grounding circuit to the terminal marked with the PE symbol of the blower if the blower
exists.
