Controller functions
Page 62
RES-440
Version 1
If a line voltage which is less than the lower limit of the permissible range occurs, the controller is switched to a
standby mode. No more heatsealing processes take place and no more measuring impulses are generated. The
display changes to indicate this.
The main menu is displayed again, and operation is resumed, when the input voltage returns to the specified tol-
erance range.
The alarm relay (terminals 5+6) is only switched by an undervoltage condition in controllers up to and including
software revision 008. The last valid temperature value continues to appear at the analog output (terminals
23+24).
The alarm relay in controllers with a higher software revision number is not switched if an undervoltage condition
occurs. The standby mode is indicated by 0…3°C (corresponds to app. 0V) at the analog output.
Trouble-free operation of the controller is only guaranteed within the specified input voltage toler-
ance range. An external voltage monitor must be connected to prevent defective heatseals as a
result of low line voltage.
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