Toshiba Q-Flowsaver II - Manual (Page 61)

TOSHIBA
11.2 Inverter to Relay/PC Connections
Terminals RCH (UL) and LOW (LL) of the control circuit terminal block are open collector
outputs which float in an open state. When the predesignated frequency has been
reached the terminals can sink 24Vdc at SOmAdc to ground. P24 supplies 24Vdc through
the relay colls to the RCH (UL) and LOW (LL) terminals for relay activation. Connections
are shown below for either relay logic or programmable controller Inputs. Notice that
there is no difference in the circuits except how the relay outputs are utilized.
Inverter-to-relay connections
Inverter-to-programmable controller
connections
(Consult factory for specific applications) Relay Logic Outputs
* Free-wheeling diode (Use lamp 1000PIV or similiar) to be oriented across load so that it does
not conduct during normal current flow.
Note:
When an output frequency fluctuates in the vicinity of a frequency to be reached, the reach signal
may alternately turn on and off because of the lack of hysteresis in the reach signal.
11.3 Fault-Detection Output Terminals
When any of the inverter's system protection features are activated and the inverter trips
(See list of probable causes on Page 8-3), the cause of the problem will be displayed
and a fault-detection relay will be activated. This will cause the contacts associated with
the Fault-Detection Output Terminals to change state. Three fault detection terminals
FLA, FLB, and FLC are provided as a NO, NO form C contact rated for a 250Vac/30Vdc
2A output.
NO NO
O I o
FL
Internal To
Inverter
FLA FLB FLC
Jj
Terminal Connections
1 1 - 2