Siemens Logo! Manual page 12

Getting started with LOGO!
The LOGO! system offers you many solutions such as for
small domestic installations, simple automation tasks, and
even complex engineering tasks involving its integration
into a bus system (e.g. communication module AS inter-
face).
Note
LOGO! Basic may only be equipped with expansion mod-
ules of the same voltage class. Mechanical encoding pins
in the housing prevent you from connecting devices of a
different voltage class.
Exception: The left-hand interface of an analog module or
communication module is galvanically isolated.
This type of expansion module can therefore be connected
to devices of a different voltage class.
See also Chapter 2.1.
Each LOGO! Basic provides the following connections for
the creation of the circuit program, regardless of the num-
ber of connected modules:
S
Digital inputs I1 to I24
S
Analog inputs AI1 to AI8
S
Digital outputs Q1 to Q16
S
Analog outputs AQ1 and AQ2
S
Digital flag blocks M1 to M24, M8: Startup flag
S
Analog flag blocks AM1 to AM6
S
Shift register bits S1 to S8
S
4 cursor keys
S
16 blank outputs X1 to X16.
4
LOGO! Manual
A5E00380835-01