Consumer controller – Type 8543

Alternating current monitoring AC 230 V


The type 8543 consumer controller works as an error-reporting device and monitors the voltage-dependent power drawn from a consumer that is supplied with AC. The failure of a consumer is indicated by an LED. After a delay period of around 5 minutes (other values are possible on request), the transmitting relay (relay output) is activated. The transmitting relay works as a quiescent current relay so that a failure of the power supply is also reported (self-monitoring).

All consumers whose power ratings are constant during error-free operation (such as points heaters) are suitable for monitoring.


The type 854314 converter (sensor) records the total current drawn by the consumer. The type 854300 consumer controller measures the associated supply voltage via an internal voltage transformer when working as an error-reporting device and stores these measured values for voltage and current in non-volatile data memory. These measure values serve as a reference for the actual measurement, in which the value of the current is continuously taken as the criterion for the evaluation in accordance with the supply voltage. Thus both consumers drawing the same amount of current or different amounts of current can be monitored together. A maximum of 9 consumers can be monitored together, whereby the permissible total current may not be exceeded.

The converter can be adapted to the required tasks over a wide range by multiple plugging-through of the current-carrying cable.


Initial commissioning

Consumers drawing the same current: The number of consumers is set with the two-button selector switch on the front panel of the unit. Once you are certain that all the consumers are working in a stable way (if necessary, allow time for starting up and running in), press the “PROG” button to start a teach-in procedure. The yellow LED lights up during the teach-in procedure. The unit operates when the LED goes out.

Consumers drawing different currents:
In this case the number of consumers to be set must be determined by calculation. The number to be set is derived from the total rated power of all connected consumers, divided by the lowest rated power that is connected (values with odd numbers must be rounded up or down). If the results in a value greater than 9, monitoring is only possible in such a case if the total amount of the rated power that is connected is divided by twice the number of consumers that are not more than 80% of the rated power of that of the smallest consumer.

See the complete brochure folder for details of further current monitoring units, also for DC.

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