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Siemens Standard application AHU CE1P3977en_02
Building Technologies Hardware overview 01.02.2010
4 Hardware overview
4.1 Basic controller (POL638x)
The exact designation of inputs / outputs in the program or HMI is available in the
point table in the appendix.
To connect external components to the process unit, these instructions must be
followed.
X1...X8
Connection instruction
Power supply
Digital inputs
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 15