Omron NX-SL3300 User Manual page 151

Precautions for Correct Use
• The maximum number of connections per Unit is as follows:
NX-SIH400: 20 (10 connected in series × 2 series)
• You can connect up to 10 Non-contact Door Switches to each test output terminal.
• You cannot branch the connections to more than one Non-contact Door Switch from the
same test output terminal.
24 VDC
0 V
• The total wiring length (L1 + L2 +...+ Ln+2 in the figure above) for the D40A or D40Z Non-
contact Switches is 100 m max.
• The D40A Non-contact Door Switch can be used in a Safety Category 3 or lower or a PLd or
lower application. It cannot be used in a Safety Category 4 or PLe application.
• The D40Z Non-contact Door Switch can be used in a Safety Category 4 or lower or a PLe or
lower application.
l UM/UMA Safety Mats
OMRON UM/UMA Safety Mats are connected as shown in the following figure.
NX-SIH400
T0
T1
Si0
Si1
Example of Sysmac Studio Settings:
NX-series Safety Control Unit User's Manual (Z930)
Non-contact Door Switches
The unit that supplies the I/O
power to the NX bus
NX-SI
T0
Si0
IOV IOV
Si1
IOG IOG
Si2
Si3
NX bus connection
n pcs (n=12 max.)
Blue Black Blue
White Brown White
L L
1 2
4 Safety Control Unit Operation
Black
Brown
L L
3 n
L
n + 1
Safety mat
4 - 19
4