Technical Information
Chapter
1
HC8X Heat Control
Product Description
8010043
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SICK AG · All rights reserved
1-15
Heating mode "T1" = control with permanent safety temperature switch-off
As standard control "H1", however the safety relay permanently interrupts the voltage
supply of the heating circuit when the set tempe limit is exceeded. A return to
controlling is possible only by a control reset.
Heating mode "B1" = temperature limiting without control function.
Exceeding the set tempe limit interrupts the supply voltage of the heating cir-
cuit. A return to monitoring is possible only by a control reset.
The series connection of a controller with "T1" function and a controller with "B1"
function makes possible the temperature control of components in explosion zones.
For safety reasons, the two controllers of a heating circuit may not be located in the
same HC8X heat control.
Note
Check the respective heater mode after a control unit change. Readjust as required
(see Chapter 4.5 Configuration and Parameter Setting with SETHC8X.EXE under Win-
Control unit damage caused by incorrect configuration!
The control unit configuration may be changed only by SICK.
The heat control is supplied configured. Changes to an existing configuration are normally
not required. However, if a configuration needs changing, e.g. to create load symmetry, pro-
ceed according to Chapter 7.2 Configuring the Power Bars, page 7-39.
1.2.2
Schematic Block Diagram
Fig. 1-2:
HC8X Block Diagram
DC
115 V/230 V
50 - 60 Hz
Optical serial
interface
TTemperature
sensors
8 x PT100
Microcontroller
Control section
Incoming feeder (X9)
Power section
L1
N
PE
HC8X heat control
Socket
with mains filter
Supply line
3P + N + PE
115 V/230 V
50 - 60 Hz
8 x heating circuit
115 V/230 V
50 - 60 Hz
ELR
L3
L2
L1
N
PE
8 x PT100
PE
n
I
Neutral voltage
switch (HON)
Safety relay
(HEN)
Therm. delayed
overcurrent trip
Meas. system PC /
other MODIOS
X1 - X8
115 V/230 V
50 - 60 Hz
(X10)
