41
CONNECTION OF THE POWER UNIT
4.2.6 Connection of a braking resistor
4.2.6.1 Terminal block X1B connection braking resistor
X1B Name Function Cross-section
Tightening torque
++, R
Connection for
braking resistor
AWG without
wire-end
ferrule
mm² with
wire-end
ferrule
1.2…1.5 Nm
12 lb-inch
20...8 2.5...10
stranded wire
Figure 15: Terminal block X1B connection of a braking resistor
Terminal R can alternatively be labeled with PB.
4.2.6.2 Wiring of an intrinsically safe braking resistor
X1B
R
- -
++
U
V
W
①
②
Legend
1
Twist the connection cable. In case of extension of the connection cable, shield
the cable and connect it on both sides.
2 Protective earth is provided via the housing.
Figure 16: Wiring of an intrinsically safe braking resistor
NOTICE
Only intrinsically safe braking resistors permitted !
Only "intrinsically safe" braking resistors are permissible for this oper-
ation, since these resistors interrupt themselves at fault such as safety
fusewithoutrerisk.
Technical data and design for intrinsically safe braking re-
sistors.
www.keb.de/fileadmin/media/Manuals/dr/ma_dr_safe-braking-resis-
tors-20106652_en.pdf
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