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3.6 End-Limit signals PEL and MEL
There are two end-limit signals PEL and MEL for each axis. PEL indicates end limit signal in plus direction and MEL indicates end limit signal in minus direction. The following table is the pin assignment for EL signal.
CN1 Pin No. Signal Name
6 COM+
7
8
COM+
COM+
10
11
60
61
14
15
64
65
18
19
68
69
55
56
PEL1
MEL1
PEL2
MEL2
PEL3
MEL3
PEL4
MEL4
PEL5
MEL5
PEL6
MEL6
COM-
COM-
Description
Ext +24V
Ext +24V
Ext +24V
End limit (+) •
End limit (-) •
End limit (+) ‚
End limit (-)
‚
End limit (+)
ƒ
End limit (-)
ƒ
End limit (+)
„
End limit (-) „
End limit (+) …
End limit (-) …
End limit (+) †
End limit (-) †
Ext Common Ground
Ext Common Ground
Alternative Name
COM+
COM+
COM+
DI 7
DI 8
DI 9
DI 10
DI 11
DI 12
DI 13
DI 14
DI 15
DI 16
DI 17
DI 18
COM-
COM-
Notice that the alternative name means that if users don’t use motion functions at one or more axes, the digital input will be treated as general purpose input channel.
The signal connections and relative circuit diagram are shown in the following diagram. The external limit switches features 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 software setting.
Figure 3.6.1 Connection of EL signal
28
• Signal Connection
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