Control Terminal Functions - Hitachi RCU- 2015 Instruction Manual

Control Terminal Functions

Input Signals
7: RUN
When RUN input is given and DC bus voltage is higher than the RCU operating voltage,
regeneration is started.
9: RCU ENABLE
When RCU ENABLE input is given, RCU operation is possible.
10: EXTERNAL FAULT (A)
When EXTERNAL FAULT (A) input is given, the RCU cuts output power, and
regenerative converter operation is stopped.
12: FAULT RESET
If FAULT RESET input is given, the RCU fault condition is cleared.
11, 16: COMMON
Common terminal for input signals
Note: When terminals 7, 9, and 11 are jumpered together, regenerative operation
automatically starts when the inverter's DC bus voltage is above the RCU operating
voltage. These jumper wires are factory pre-installed for your convenience.
Output Signals
Fault Relay
This relay is activated when fault trip has occurred.
21 (A): Regenerative Converter error A contact (NO)
22 (B): Regenerative Converter error B contact (NC)
23 (COM): Regenerative Converter error common
Converter Ready Relay
This relay is activated when the regenerative converter is ready to operate.
24 (A): Regenerative Converter Ready A contact (NO)
25 (B): Regenerative Converter Ready B contact (NC)
26 (COM): Regenerative Converter Ready common
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