28
•
Signal Connection
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
Description
Alternative Name
6
COM+
Ext +24V
COM+
7
COM+
Ext +24V
COM+
8
COM+
Ext +24V
COM+
10
PEL1
End limit (+)
•
DI 7
11
MEL1
End limit (-)
•
DI 8
60
PEL2
End limit (+)
‚
DI 9
61
MEL2
End limit (-)
‚
DI 10
14
PEL3
End limit (+)
ƒ
DI 11
15
MEL3
End limit (-)
ƒ
DI 12
64
PEL4
End limit (+)
„
DI 13
65
MEL4
End limit (-)
„
DI 14
18
PEL5
End limit (+)
…
DI 15
19
MEL5
End limit (-)
…
DI 16
68
PEL6
End limit (+)
†
DI 17
69
MEL6
End limit (-)
†
DI 18
55
COM-
Ext Common Ground
COM-
56
COM-
Ext Common Ground
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
