User`s guide

Signal Connections • 23

3.4 End-Limit Signals PEL and MEL

There are two end-limit signals PEL and MEL for one axis. PEL indicates

end limit signal in plus direction and MEL indicates end limit signal in minus

direction. The relative signal name, pin number and axis number are shown

in the following table.

CN2 Pin No

Signal Name

Axis #

CN2 Pin No Signal Name

Axis #

37 PEL1 • 87 PEL3 ƒ

38 MEL1 • 88 MEL3 ƒ

43 PEL2 ‚ 93 PEL4 „

44 MEL2 ‚ 94 MEL4 „

The signals connection and relative circuit diagram is shown in the following

diagram. The external limit switches featuring a contact capacity of +24V,

6mA minimum. You can use either ‘A-type’ (normal open) contact switch or

‘B-type’ (normal closed) contact switch by setting the DIP switch S1. The

PCI-8134 is delivered with all bits of S1 set to OFF, refer to section 2.10.

For the details of the EL operation, please refer to section 4.3.2.

EX+24V

=6mA Max.

Filter

Circuit

To PCL5023

PEL

MEL

4.7K

EXGND

Inside PCI-8134

CN2

ß Switch