Siemens S5-155U System Manual page 473

9.7 The 470 Analog Output Module
9.7.1
Design
Addressing switch, mode
switches
9.7.2
Function of the Enable Input The 470 module has an enable circuit. You can use the enable inputs
System Manual
C79000-B8576-C109-03
The module is designed as a plug-in PCB for central controllers and
expansion units with a backplane connector and with a blade
connector to accept a plug-in front connector. You can directly
connect the process signal lines to the front connector, which is
available separately, with screw or crimp terminals.
Situated on each module is an addressing switch with six rockers to
set the module address.
The modules are protected by covers on both sides.
Blade Connector
Front
Connector
Figure 9-34 Analog Output Module
to switch off individual modules whilst the PLC is in operation. This
means that:
• • The module can no longer be addressed by the user program.
• • On analog output modules, the last analog value to be output is
retained.
Modules which are switched off can be removed or inserted during
operation. If this is not necessary, operate the module with the enable
input switched off.
The 470 Analog Output Module
Addressing Switch
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9