Warner Electric EMER - Manual (Page 4)

4 Warner Electric Europe • +33 (0)2 41 21 24 24 P-2055-WE • 2/13
3.3.2 Examples of typical assemblies
4 Electrical connection
EM and EMER should be supplied with direct
current and are fitted clutch side and brake side
with a 900 mm long cable or a connector to
supply them independently.
The polarity has no major effect on the operation
of the
EM version, as opposed to the EMER
version for which the polarity marked must be
scrupulously complied with on the
EMER brake.
Also, when fast, accurate cycling is required,
one seeks to avoid any residual torque being
generated by residual magnetic currents from the
clutch and brake that influence the armature’s
separation time.
For this, the coils must be correctly polarised and
we recommend that the clutch’s brown or red wire
and the brake’s blue or black wire are connected
to the electric potential.
For equipment with a terminal block, tab 1
is connected to the brown wire and tab 2 is
connected to the blue wire.
4.1 Important recommendations
All works on the electrical connections have to
be made with power off.
Be sure to comply with the nominal supply
voltage. Low supply level results in a reduction of
start distance and transmissible torque.
The connecting wires should be of sufficient cross
section to avoid drops in the voltage between the
supply and the equipment being supplied.
Tolerance for supply voltage to the clutch and
brake terminals + 5% - 10% (NF C 79-300).
4.2 Supply, cabling
To control our clutch-brakes, Warner Electric
advises that you use one of its control units.
Different models, suited to each application, are
available:
• CBC 400/450 is the most basic, enabling the
clutch and brake to be engaged alternatively
or simulta neously, but without adjustment of
the voltage being possible.
• CBC 500/550 enables the clutch-brake to
be engaged alternatively or simultaneously
and the voltage is adjustable. It is especially
suited to
EMERs where voltage adjustment is
necessary on the electro-retained brake.
• CBC 700 is a control unit with overexcitation
which enables a very fast rise in torque,
it is especially suited to fast cycles and very
accurate stops.
• CBC 750 is a control unit with very high
overexcitation. It is exclusively for similar
but more severe applications than
CBC 700.
Warner Electric control units provide
protection for coils and circuits, as well as
anti-overlapping. In the event of our clutch-
brakes being used without one of our control
units, with DC circuit switching, it is essential
that the coil is protected against excessive
voltage by a varistor fitted in parallel.
FOOT
Sprocket Gear
SHAFT - INPUT
SHAFT - INPUT
HOLLOW SHAFT -
FLANGE- INPUT
FLANGE - SHAFT
- OUTPUT
FLANGE - SHAFT
- OUTPUT
FLANGE - HOLLOW SHAFT
- OUTPUT
V-belt
sheave
Shaft
Gear
reducer
Worm gear
Flange motor
Hollow shaft
I (A) / L (m) 0 to 10 m from 10 to 20 m
0 to 3 (A) 1,5 mm 2 1,5 mm 2
3 to 6 (A) 1,5 mm 2 2,5 mm 2