Festo MPA-S, Manual

Page: 74 / 174

3 Mounting and installation
74 Festo – P.BE-MPA-EN – 1309f – English
3.8 Connecting the electric cables
Warning
• Only use PELV circuits in accordance with IEC/EN 60204-1 (protective extra-low
voltage, PELV) for the electrical power supply.
• Also observe the general requirements for PELV circuits in accordance with
IEC/EN 60204-1.
• Only use voltage sources which ensure reliable electrical disconnection of the oper-
ating voltage in accordance with IEC/EN 60204-1.
The use of PELV circuits ensures protection from electric shock (protection from direct and indirect
contact) in accordance with IEC/EN 60204-1 (Electrical equipment of machines, General requirements).
Note
• Ascertain which measures, in line with your EMERGENCY OFF procedures, are neces-
sary for putting your machine/system into a safe state in the event of an EMER-
GENCY OFF (e.g. switching off the operating voltage for the valves and output mod-
ules, switching off or pressure).
MPA-S valve terminal with multi-pin plug connection:
Instructions on electrically connecting the MPA-S valve terminal with multi-pin plug con-
nection can be found in the package insert.
MPA-F valve terminal with CPX terminal:
Instructions on connecting the operating voltage can be found in the system description
of your CPX terminal.
Detailed instructions on connecting the CPX modules (bus node, I/O modules, etc.) can
be found in the corresponding descriptions for the CPX modules ( the system descrip-
tion of your CPX terminal, table “Descriptions of the CPX terminal”).
3.8.1 Load voltage supply via electrical supply plate (only for MPA-S valve terminal with CPX
terminal or CPI interface)
The electric air supply plate type VMPA-FB-SP-...-V-... supplies the valves additionally with load voltage
when, for example, the valve terminal is to be operated with different voltage zones or when the re-
quired load voltage cannot be provided by the CPX terminal alone.