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APEX615n Installation Guide
Regeneration
Resistor
The APEX615n can dissipate regenerated energy in its internal regeneration resistor. If an
APEX615n system regenerates more energy than the internal resistor can dissipate, you can
connect an external resistor between the two terminals labeled V Bus+ and Regen Resistor,
located on the motor connector. The external resistor will double the APEX615n 's dissipation
capabilities.
The APEX615n's regeneration circuit works automatically—there are no adjustments to make.
The circuit monitors the voltage on the power bus. If regenerated energy from the motor
causes the bus voltage to rise above a threshold value, the circuit closes a switch, thus
connecting the regeneration resistor between the positive and negative sides of the power bus,
V Bus+ and VBus–. The energy is then dissipated in the resistor. During the regeneration event,
the red LED labeled Regen Active, located on the APEX615n's front panel, will be illuminated.
See Chapter 2: Troubleshooting for additional information about the regeneration LEDs. See
Appendix G for information on how to determine if an external regeneration resistor is necessary
for your system, and if so, how to calculate the proper regeneration resistor value.
Testing the Installation
WARNING
This test procedure allows you to control I/O and produce motion. Make sure that
exercising the I/O will not damage equipment or injure personnel. We recommend that you
leave the motor uncoupled from the load, but if you have coupled the load to the motor,
make sure that you can move the load without damaging equipment or injuring personnel.
NOTE
The test procedures in the table are based on the factory-default active levels for the
APEX615n's inputs and outputs. Verify these settings with the following
status
commands:
Command Entered Response Should Be
INLVL *INLVLØØØØ_ØØØØ_ØØØØ_ØØØØ_ØØ
HOMLVL *HOMLVLØ
LHLVL *LHLVLØØ
OUTLVL *OUTLVLØØØØ_ØØØØ_Ø
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