4.4 connection of a braking resistor
Attention
Destruction of the frequency inverter if the vale has fallen below the
minimum brake resistance value!
►
The minimum brake resistance value must not fall below!
cAUTION
Hot surfaces caused by load of the braking resistor!
burning of the skin!
►
Cover hot surfaces safe-to-touch.
►
Before touching, check the surface.
►
If necessary, attach warning signs on the system.
4.4.1 Terminal strip X1b connection braking resistor
X1b
Name
function
cross-section
Tightening
torque
++, R
Connection for braking
resistor (alternatively
++, PB)
0.2...2.5 mm²
AWG 24...12
0.5…0.6 A
5…7 lb-inch
– –
DC link –
PE,
Connection for protec-
tive earth
Screw M4
1.3 Nm
11 lb-inch
Figure 12: Terminal block X1B
4.4.2 Wiring of an intrinsically safe braking resistor
X1B
R
--
++
U
V
W
Only "intrinsically safe" braking resistors are permissible for this op-
eration, since these resistors interrupt themselves at fault such as
safety fuse without fire risk. Further information can be found in the
instruction manual for G6 braking resistors.
Figure 13: Wiring of an intrinsically safe braking resistor
37
