Installation
312
8.
INSTALLATION
Connection between modules
286
DDS
HARDWARE
Ref.1310
How to install an external Ballast resistor with an external thermo-
stat and with no fan
WARNING.
On top of the ER+TH modules, the air temperature can reach
values over 120 °C (248 °F). Therefore, the resistor should be mounted
away from the rest of the modules or even outside the electrical cabinet,
always vertically and away from cables and other temperature sensitive
material.
F. H8/15
Installing the external Ballast resistor with internal thermostat and with no
fan.
Re
L+
200°C
+ 24 V DC
PLC INPUT
External
thermostat
Tk
Tk
Ballast resistor connection
terminals.
Always install it vertically
Re L+
Diagram
Take either one of the two pins to + 24 V DC of the
external power supply of the electrical cabinet and the
other one to a PLC input.
IMPORTANT. Remember to manage the chosen PLC
input in the PLC program to generate an error when
exceeding the limit temperature (160 °C) detected by
the sensor and to open the contact.
Take the Ballast resistor terminals to the Re and L+ terminals of
the terminal strip of the Ballast of the power supply or compact
drive accordingly.
External thermostat
Element to connect with
the external thermostat
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