53
Signal Input Circuits
IMS-MN-LMDA42C_A.pdf
LMD CANopen
NPN Sensors in a Sinking Home/limit ± Configuration
A common configuration is to have two sensors which define the PLUS and MINUS limits of
travel, and a third to home the axis. The following illustrates three NPN sensors connected to
the LMD inputs 2 - 4 in that configuration.
Input reference
Input 2 (LIMIT +)
Input 3 (LIMIIT -)
Input 4 (HOME)
LMD
+5 to 24 VDC
+
–
(brown) +
(black) signal
(blue) −
(brown) +
(black) signal
(blue) −
(brown) +
(black) signal
(blue) −
NPN sensors*
*wire colors shown
are typical for sensors
Refer to the LMD MCode manual or the appropriate fieldbus manual for full setup and
configuration details for the inputs.
Input #
Function
Switch state
MCode setup string
(Is=[in #],[func],[active])
Notes
2
LIMIT +
normally open
IS=2, 2, 0
Set IN 2 as LIMIT +, active when low (switch closed)
3
LIMIT –
normally open
IS=3, 3, 0
Set IN 3 as LIMIT –, active when low (switch closed)
4
HOME
normally closed
IS=4, 1, 1
Set IN 4 as HOME, active when high (switch open)
PNP sensors in a sourcing general purpose configuration
The following graphic illustrates three (3) PNP sensors connected to the LMD inputs 2 - 4.
These inputs are configured as general purpose and may be used in an MCode program to
perform branch or call subroutine operations.
Input reference
Input 2 (general purpose)
Input 3 (general purpose)
Input 4 (general purpose)
LMD
+5 to 24 VDC
+
–
(brown) +
(black) signal
(blue) −
(brown) +
(black) signal
(blue) −
(brown*) +
(black) signal
(blue) −
PNP sensors
*wire colors shown
are typical for sensors
