Bosch CL300 Manual page 79

Flexible Automation
4.3 Input Modules
All specifications for input modules are referenced to operation with a fan unit.
4.3.1 Digital Input Modules
Function
Configuration
Specifications
Caution
The digital input modules are used for converting the external process
signals to the internal signal levels.
The input modules are available with 16 and 32 channels. For safer op
eration of the controller system, the DC or AC signals from the process
are electrically isolated from the internal logic through the use of op
tocouplers. Each input has an LED for indication of signal status.
LED off −−> Signal status 0"
LED on −−> Signal status 1"
The specifications of input modules are listed in the table below.
System Modules
4−27