3. Installation
32
Electrical Installation
DANGER:
When executing any installation in an electric panel, certify that the main energy supply is
OFF.
Electrical Safety
ATTENTION:
The pin 5 of HX8300 and HX8320 modules terminal block is the ground protection and shall be
connected to the local ground with a good connection, ensuring a maximum impedance of 0.1 Ω.
DANGER:
The HX8320, HX1120 and HX2320 modules use voltages between 91 and 135 Vdc on power
interfaces, digital inputs and outputs, respectively. Therefore, one should be careful when
handling the cables and terminals of these modules during the stages of installation, use and
maintenance, always checking if they are in good condition, without cuts or breaks. To ensure
greater security, the modules terminal blocks are rated as IP20.
ATTENTION:
The COM 1 serial interface (RS-232 / RS-485) of CPU HX3040 has a DB9 connector rated as IP20,
and thus there is no risk of electric shock. However, be sure to not touch the cable pins, which are
connected to this interface. Due to the danger presented by this interface in case of single failure,
connect it exclusively to products with insulation higher than 820 Vac.
ATTENTION:
In case of simple fault conditions, HX9001 and HX9003 Printed Circuit Boards may present
dangerous voltages in the highlighted area (Figure 3-13). Certify that the panel energy supply is
OFF when touched.