Power Terminal Connections
TERM | Function |
L1+ | DC Bus Positive |
L2- | DC Bus Negative |
R1+ | Resistor Positive |
| (Same potential as DC Bus Positive) |
R2- | Resistor Negative |
| (Switched Output) |
R3+ | Terminal must be connected to the external resistor whenever the |
| separate mounted RPM panel with the required additional |
| protective components is connected directly to the DC bus. See |
| FIGURE 4 for example connections. |
External Power Connection
An external 24V supply may be connected to the brake chopper at pins 1 and 10. The internal 24 and 15 volt power supplies of the brake chopper is derived from the main DC bus input and takes approximately 50ms to start up. If it is necessary for the brake chopper to be active within less than 50ms of applying the DC bus voltage an external power supply should be provided.
The external
Synchronization
Synchronization equalizes the power dissipation in the braking resistors.
When two or more brake chopper modules are connected to the same DC bus they should be synchronized by linking together all of the SYNC signals on all modules and linking together a 0V common from each module. See FIGURE 2 for connection.
When the DC bus voltage exceeds the voltage threshold of any of the brake choppers the SYNC signal will turn all of them on. The DC bus voltage must fall below the voltage threshold of all choppers in order for the synchronized modules to turn off.
Regenerative Power Module - September 2010
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