ADLINK Technology HSL-4XMO, User Manual

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Signal Connections 19
and DIR). For detailed operations of the ORG signal, refer to sec-
tion 4.8.
3.4 End-Limit Signals PEL and MEL
There are two end-limit signals PEL and MEL for each axis. PEL
indicates the end limit signal is in the plus direction and MEL indi-
cates the end limit signal is in the minus direction.
A circuit diagram is shown in the diagram below. The external limit
switch should have a contact capacity of +24V @ 6mA minimum.
Either ‘A-type’ (normal open) contact or ‘B-type’ (normal closed)
contact switches can be used. The type of switch can be config-
ured by software. For more details on EL operation, refer to sec-
tion 4.8.
Figure 3-7: End-Limit Signals PEL and MEL
3.5 Ramping-down & Position Latch
There is a SD/LTC signal for each of the 4 axes. A circuit diagram
is shown below. Typically, the limit switch is used to generate a
slow-down signal to drive motors operating at slower speeds.
While act as the LTC signal, it will trigger the counter-value-captur-
ing functions, which provides a precise position determination. For
more details on SD/LTC operation, refer to section 4.8.