Delta HES Series User Manual page 25

Chapter 2 Wiring|HES Series
Terminals [+1, +2] for connecting DC reactor, terminals [+1, +2/B1] for connecting brake
resistor:
These terminals are used to improve the power factor of DC reactor. There are
shorting plates on them when they leave the factory. Remove the shorting plates
before connecting the DC reactor.
For models with power ＞ 30kW, there is no driver loop for brake resistor inside. To
increase the brake capability, please use an external brake unit and brake resistor
(both are optional).
Never short [B2] or [-] to [ ＋ 2/B1], which will damage the Hybrid Servo Controller.
+1
Shorting Plate of DC Reactor
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