KEYENCE SL-C Series - Manual (Page 42)

Chapter 3 Wiring
3-6
3
English ENGLISH
3-7 Series Connectin and Light Interference Prevention Connection (Parallel Connection)
The series and parallel light interference prevention connection can be combined as shown below.
This function is valid if the number of SL-C in a series connection and connected via a light interfer-
ence prevention cable is 12 or less, and if the total number of beam axes is 192 or less. For SL-C units
that are configured as main units, the total number of SL-C Series connected in series must be 4 pairs
or less, while the total number of SL-C Series connected in series and configured as sub units must be
3 pairs or less. The response time of the SL-C is not affected by this combination of series connections
and light interference prevention connections.
See “Connection for Light Interference Prevention”
(page 3-5).
Main/sub select input: Sub unit is
selected by +24 V input voltage
or open connection (pink wire) Main/sub select input: Main unit
is selected by the input level of
0V connection (pink wire)
Connection cable for
transmitter (gray)
Connection cable for receiver (black)
Connection cable for transmitter (gray)
Connection cable for
receiver (black)
Output Output Output
Main unit (4pairs Max.)
Synchronization
cable
(Orange)
(Orange/Black)
Synchronization
cable
(Orange)
(Orange/Black)
Synchronization
cable
(Orange)
(Orange/Black)
Light inter-
ference pre-
vention cable
(gray)
(gray/black)
Light inter-
ference pre-
vention cable
(gray)
(gray/black)
Sub unit (3pairs Max.)
Sub unit (3pairs Max.)
Tr
ansmitter
Tr
ansmitter
Receiv
er
Receiv
er
Tr
ansmitter
Tr
ansmitter
Receiv
er
Receiv
er
Tr
ansmitter Receiv
er
The total number of
beam axes is 192.
WARNING
• Use the series connection cables provided by KEYENCE only ( See 1-2-2 “Ca-
bles” ( ➮ page 1-3) for special cable types and relevant information). Otherwise,
the SL-C may not operate normally and a serious harm, such as an injury or
death of a machine operator, may result.
• Use 2-wire shielded cable that is at least AWG #22 (nominal cross-sectional area
of 0.3 mm 2 ) for interference prevention connections. Also, use shielding that has
the same electric potential as that being used for the SL-C itself. Otherwise, the
SL-Cs may not operate normally and a serious harm, such as an injury or death
of machine operator, may result.
• When using 2 or more of SL-C units without using the above-mentioned series
connection, a light interference prevention connection, or a combination of both,
install the SL-Cs correctly to prevent light interference.
➮See “2-3-5 Light Interfer-
ence Prevention Method” ( ➮ page 2-14).
The responsible personnel shall perform an operational check after the SL-C has
been installed to ensure the absence of light interference.
If the SL-C units are not connected in accordance with the provisions in this
instruction manual, the SL-C will not operate normally without light interference,
which could result in serious harm, including serious injury or death to the
machine operator.
CAUTION The NPN output cable and PNP output cable cannot be used simultaneously.
WARNING
Always use the cable for PNP or NPN output suitable for the machine's safety
system with which the SL-C is installed. If the output type does not match the
specifications of machine's safety system, it is not possible to stop the machine and
serious harm, such as an injury or death of a machine operator, may result.