Toshiba Q-Flowsaver II Manuel d'utilisateur télécharger pdf (Page 61)

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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

Internal To

Inverter

FLA FLB FLC

Terminal Connections

11 -2

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Toshiba Q-Flowsaver II Manuel d'utilisateur Page 61