Warner Electric SFM and Brakes PBM Electro-Magnetic Single Disc - Manual (Page 5)

Warner Electric Europe • +33 (0)2 41 21 24 24 P-2086-WE • 11/12 5
4 Electrical connection
SFM and PBM equipment should be supplied
with Direct Current and has factory fitted wires
of length 400 mm. Polarity has no effect on
operation.
4.1 Important recommendations
Ensure that the nominal supply voltage is
complied with (a lower voltage causes a reduction
in the starting distance and transmissible torque).
The connecting wires should be of sufficient
diameter to prevent power loss between source
and the equipment to be supplied.
Tolerance for the supply to the clutch or brake
terminals +5% / -10% (NF C 79-300)
4.2 Power supply
For the control of these clutches and brakes we
advise the use of Warner Electric CBC 140-4,
CBC 140-6, CBC 400, CBC 450, CBC 500, CBC
550, and CBC 700 supply units.
Warner Electric supply units provide protection
for the coils and circuits. In the case where a
brake or clutch is used without our supply units,
with switch on the DC circuit, it is essential
to protect the coil against power spikes by a
varistor fitted in parallel.
I (A) / L (m) 0 to 10 m from 10 to 20 m
0 to 2 (A)
3 to 6 (A) 1,5 mm 2
1,5 mm 2
1,5 mm 2
2,5 mm 2