Instruction Manual
Microprocessor Temperature Regulator HT MC11
Page 7 of 22
5 Electrical Connection
Electrical connection has to be carried out according to respective national/
legal regulations (in Germany e.g. VDE 0100).
We would like to point out again that the electrical connection must only be carried
out by an electrician.
Mains and temperature sensors must be connected according to the wiring diagram
(see appendix). Only use temperature sensors suitable for the configuration.
The correct position of the temperature sensor is important for reliable function of
the controller. The temperature sensor of the regulator should be situated as close as
possible to the heating. This will avoid swinging of the controlled system or the tem-
perature.
Important advice for temperature sensor connection:
• Only use suitable sensor types (see configuration sheet)
• Lay the connection line of the temperature sensor in sufficient distance to cur-
rent-carrying cables.
• The sensor line should be as short as possible in order to minimize interference.
• Only use appropriate compensating cables to extend thermocouple connection
lines.
6 Special Functions
6.1 Temperature Supervision
The regulator is equipped with integrated temperature supervision. The heating cur-
rent relay is switched off if the temperature exceeds the limit value. The limit value is
adjusted with parameter AL. L . % (see page 10).
The supervision function must be activated by the parameter r E L . C . It is possible to
select whether the heating starts operating again after the temperature has fallen be-
low the limit value, or if the heating is switched off permanently and must be
restarted manually. If self hold is active, it can be released by pressing keys " " and
" E " simultaneously.
If the parameter C o . c 1 is set to C L. S H , self hold can also be released by closing the
external contact (terminals 24, 25, see wiring diagram in the appendix).
The switching status of the heating current relay is indicated by LED A2.
If the temperature supervision alarm has been triggered, the flashing text A L . L i is
displayed.
The temperature sensor for temperature supervision is selected with parameter
SE n . L . This setting is independent of the sensor for temperature regulation.
The actual value of the temperature sensor for temperature supervision is displayed
by the parameter t. L i in the operating level.
PLEASE NOTE:
If the temperature supervision function in combination with a second temperature
sensor is not activated, the heating current relay is opened when the setpoint is ex-
ceeded by the value which is adjusted in parameter AL2 . # (default setting: 30 K).
Version 1080/1.03 02/2018
471 11 400
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