Siemens LOGO! Manual page 59

LOGO!'s connectors
The term connector refers to all connections and states in LOGO! .
The digital I/O status can be '0' or '1'. Status '0' means that the input does not carry a specific
voltage. Status '1' means that the input does carry a specific voltage.
The 'hi', 'lo' and 'x' connectors have been introduced to make it easier for you to create the
circuit program:
'hi' (high) is assigned the status '1',
'lo' (low) is assigned the status '0'.
You do not have to use all of the connectors of a block. The circuit program automatically
assigns the unused connectors a status that ensures proper functioning of the relevant
block. If you prefer to do so, you can identify unused connectors with an 'x'.
For information on the meaning of the term "block", refer to the topic on "Blocks and block
numbers (Page 61)".
LOGO! has the following connectors:
Inputs
Outputs
lo
hi
x
DM: Digital module
AM: Analog module
LOGO!
Manual, 10/2017, A5E01248535-AA
Connectors LOGO! Basic / LOGO! Pure
LOGO! 230RC/RCo,
LOGO! 24RC/RCo
LOGO! 12/24RC/RCo,
LOGO! 24/24o,
LOGO! 24C/24Co
Q1...Q4
Logical '0' signals (off)
Logical '1' signals (on)
An existing connection that is not used
Two groups: I9...I24
I1...I4 and I5...I8
I1,I2, I3-I6, I7, I8 I9 ... I24
AI3,AI4...AI1, AI2
Q5...Q16 none
Programming LOGO!
3.1 Connectors
AI1...AI8 none
AI5...AI8
AQ1,
AQ2
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