TOSHIBA
11 - 2
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 50mAdc to ground. P24
supplies 24Vdc through the relay coils 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-programmable controller
connections
P24
LOW
(LL)
RCH
(UL)
P24
LOW
(LL)
RCH
(UL)
Inverter-to-relay connections
Dry Contact Outputs to PC
(Consult factory for specific applications)
Relay Logic Outputs
*
*
*
*
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, NC form C contact rated for a 250Vac/30Vdc
2A output.
*
Free-wheeling diode (Use 1amp 1000PIV or similiar) to be oriented across load so that it does
not conduct during normal current flow.
relay
coil
relay
coil
relay
coil
relay
coil
Terminal Connections
FL
FLC
FLB
FLA
NO
NC
Internal To
Inverter
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