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7. Wiring and Connection
7 - 13
(3) Connection of four resistors in serial
GRZG400-2OHMJ
100mm or more
P
C
Wire length 5m or less
Use a twisted flame retardant wire.
CN30
External optional regenerative resistor
100mm or more
Install a protective cover to prevent
foreign matter (cutting chips, cutting oil,
etc.) from entering the regenerative
resistor or the regenerative resistor from
being touched directly.
DANGER
1. Install the regenerative resistor unit in the control panel or in the place in
where foreign matter does not enter the regenerative resistor unit. If
foreign matter (cutting chips, cutting oil, etc.) enters the regenerative
resistor, the servo drive unit could be damaged or fires could be caused.
2. Always mount a protective cover so that the cables, etc., do not directly
contact the regenerative resistor. A short-circuit across P-C could result in
servo drive unit damage.
3. The regenerative resistor heats up to approx. 100 degrees. (It may get
hotter depending on the installation conditions.) Pay special attention to
heat dissipation and the installation position.
Do not touch the regenerative resistor directly.
4. Use flame retardant wires or provide flame retardant treatment for the
wires connected to the regenerative resistor.
CAUTION
1. When installing on a wall, install the regenerative resistors vertically.
2. The regenerative resistor generates heat and will reach high temperatures
if the regeneration frequency is high. Do not install on wall surfaces
susceptible to heat.
3. When installing three resistors in a row, leave a space of 100mm or more
between each unit.
4. Always use twisted pair cables for connection with the servo drive unit, and
keep the wire length 5m or less. Refer to section "5-1. Selecting the wire
size" for details on selecting the wire.