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4. WIRING AND FUNCTION SETTING
4.1
Wiring Notices
l
Always connect the grounding wire to the dynamic braking unit to prevent electric
shock or fire.
l
All wiring should be done by a qualified electrician or electric shock or fire may occur.
l
Before wiring, make sure the supply power is off (or the P-N voltage is 45 V or less) to
prevent electric shock or fire.
l
Always install the dynamic braking unit on the wall before wiring to prevent electric
shock and personal injury.
l
Be sure to provide a thermal relay and a circuit, which shuts off primary power to the
inverter. This is to prevent burning-out the external single resistor due to overheating
if the dynamic braking unit malfunctions.
For actual connections, see 4.3 and 4.4.
l
Make sure the voltage rating of the dynamic braking unit is equal to that of the inverter
to prevent fire and personal injury.
l
Do not connect resistors directly to the D.C. terminals
(P and N) or fire may occur.
l
Tighten screws at their correct specified torque (see
table on right). Make sure every screw is firmly
tightened or fire may occur.
l
The power cables should be MLFC flame-retardant
poly-flex wire, allowing a voltage of 600 V and capable
of the specified amperage or fire may occur.
Notes:
1. Be sure to provide alarm contacts (AL1 and AL2) and a circuit, which shuts off
primary power to the inverter to prevent overheating and burning if the dynamic
braking unit malfunctions.
Title: (Danger.eps)
DANGER
Creator: Adobe Illustrator(TM) 7.0
CreationDate: (1/26/0) (5:10 PM)
Title: (Triangle.eps)
CAUTION
Creator: Adobe Illustrator(TM) 5.5
CreationDate: (98.4.21) (9:42)
- 3 -
Tightening
Screw size
torque (N . m)
M3
0.6 to 0.9
M5
2.8 to 3.9
M8
10 to 13.5
M10
21 to 28
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