KEYENCE SL-CHS 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-CHS 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 the units
of the SL-CHS Series that are configured as main units, the total number of SL-CHS Series connected
in series must be 4 pairs or less, while the total number of SL-CHS Series connected in series and
configured as sub units must be 3 pairs or less. The response time of the SL-CHS 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-CHS 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-CHS itself. Otherwise,
the SL-CHSs 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 units of the SL-CHS Series without using the above-
mentioned series connection, a light interference prevention connection, or a
combination of both, install the units of the SL-CHS Series correctly to prevent light
interference.
➮See “2-3-5 Light Interference Prevention Method” (➮ page 2-14).
The responsible personnel shall perform an operational check after the SL-CHS
has been installed to ensure the absence of light interference.
If the units of the SL-CHS Series are not connected in accordance with the
provisions in this instruction manual, the SL-CHS 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-CHS 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.