4 end-limit signals pel and mel, End-limit signals pel and mel – ADLINK PCI-8164 User Manual
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Signal Connections
47
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. The signal
names, pin numbers, and axis numbers are shown in the table
below.
A circuit diagram is provided below. The external limit switch
should have a contact capacity of +24V @ 6 mA minimum. Either
‘A-type’ (normal open) contact or ‘B-type’ (normal closed) contact
switches can be used. To set the type of switch, configure
dipswitch S1/SW2. By default, all bits of S1 on the card are set to
ON (refer to section 2.10). For more details on EL operation, refer
to section 4.3.2.
CN2 Pin No Signal Name Axis # CN2 Pin No Signal Name Axis #
37
PEL1
1
87
PEL3
3
38
MEL1
1
88
MEL3
3
43
PEL2
2
93
PEL4
4
44
MEL2
2
94
MEL4
4