AEG Electrolux THYRO-A User Manual download pdf (Page 4)

Limits

In addition to setting the control mode, it is also possible to set limits for the following variables:

• Voltage limitation (U)

• Current limitation (I) (only for ...H RL1 und ...H RLP1)

• Power limitation (P) (only for ...H RLP1)

Monitoring

Power controller and load circuit are monitored for malfunctions. Messages are sent via LED (see page 29, LED

messages), by bus or by fault signalling relay K1.

Limit values for voltage monitoring

The following limit values apply for voltage monitoring:

- Undervoltage monitoring: -57% of type voltage

- Overvoltage monitoring: +10% of type voltage

Only for ...H RL1 and ...H RLP1

In the event of more than 15% below the type voltage, the devices can only be operated right up to the under-

voltage limit if the electronics are supplied from an external 24V source.

For ...H1, ...H RL1 and ...H RLP1

In default state, pulse inhibition is switched internally when the undervoltage limit is exceeded, and fault signal-

ling relay K1 de-energizes (both can be set with THYRO-TOOL FAMILY).

Load monitoring (only for ...H RL1 and ...H RLP1)

The load can consist of one or more resistors connected in parallel or in parallel-series. It can be monitored up

to a freely selectable absolute undercurrent limit value. The measured current is constantly compared with a

settable undercurrent limit value. The device can thus detect an increase in load resistance. If the undercurrent

limit value is exceeded, a message is sent. Where resistance elements are connected in parallel, a partial load

interruption can be selected if the undercurrent limit value is set accordingly.

Device temperature monitoring

The Thyro-A has temperature monitoring. If the temperature is exceeded (90°), a message is sent via LED via

the bus module, or via fault signalling relay K1.

Fan monitoring (for ...F...)

The forced ventilated thyristor power controllers have temperature monitoring for the heat sink. The temperature

of the heat sink is measured. A temperature overrange of >95° triggers a signal and relay K1 is switched. The

device, however, remains switched on (configurable default setting).

Extended functions (with bus module/THYRO-TOOL FAMILY)

Certain functions cannot be set via DIP switch or potentiometer. A bus module (e. g. Profibus DP, DeviceNet,

Modbus RTU, CANopen) or a PC can be connected at the system interface X22.

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AEG Electrolux THYRO-A User Manual Page 4