Moons' MSSTAC6 User Manual page 15

MSSTAC6 Step Motor Drive User Manual
Connecting Limit switches to the MSSTAC6 Drive
The CWLIMIT and CCWLIMIT inputs are used for connecting end of travel sensors. These inputs are
differential, allowing the use of signals that are sinking (NPN), sourcing (PNP) or differential (line driver).
When switches or sensors are connected that are triggered by the motion of the motor or load, the motor can
be forced to operate within certain limits. This is useful if a program or operator error could cause damage
to the system by traveling too far.
The limit inputs are optically isolated, allowing the use of voltages for the limit circuits of 12 to 24VDC.
Long wires may then be used on limit sensors that may be located from the drive with less risk of introducing
noise to the drive electronics. The schematic diagram of the limit switch input circuit is shown below.
STAC6 Limit Input diagram
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