Siemens MicroSAM, Operating Instructions Manual, Page: 134 / 138

Glossary
MicroSAM
132
Operating Instructions, 06/2012, C79000-G5376-C560-07
RS 232
A recognized industrial standard for serial data transmission, and applies to cable lengths up
to 15 m. Differential evaluation is not possible with RS 232. The sending and receiving of
data take place on different lines.
RS 485
RS 485 is an interface standard for line-based, differential, serial data transmission. RS 485
uses a pair of cables in order to transmit one inverted version and one non-inverted version
of the data signal. The original data signal is reconstructed at the receiver from the difference
between these two signals. It is then possible to use significantly longer transmission links
and higher speeds than with RS 232. Furthermore, several transmitters and several
receivers can be connected to one pair of conductors.
Silanes
The name silanes refers to a group of chemical compounds consisting of a silicon matrix and
hydrogen. Silanes can have a branched (iso- and neo-silanes) or unbranched (n-silanes)
structure. The general total formula of these compounds combined under the generic term
catena silanes is Si
n
H
2n+2
. Ring-shaped hydrosilicon compounds are referred to as
cyclosilanes (general total formula: Si
n
H
2n
).