Npaq MR Hardware Manual
Installation and Configuration
2.4.5. End Of Travel Limit Inputs
End of Travel (EOT) limits are used to define the end of physical travel. The EOT limit inputs accept 5-24
VDC level signals. The active state of the EOT limits is software selectable (refer to the A3200 Help file).
Limit directions are relative to the encoder polarity in the diagnostics display (refer to
).
Positive motion is stopped by the clockwise (CW) end of travel limit input. Negative motion is stopped by the
counterclockwise (CCW) end of travel limit input. The Home Limit switch can be parameter configured for
use during the home cycle, however, the CW or CCW EOT limit is typically used instead.
Table 2-14:
End of Travel Limit Inputs Pin Assignment
Pin#
Description
In/Out/Bi
12
Clockwise End of Travel Limit
Input
16
+5V Power for Limit Switches (500 mA max)
Output
20
Signal Common for Limit Switches
N/A
22
Home Switch Input
Input
24
Counterclockwise End of Travel Limit
Input
TO LIMIT
SWITCH POWER
PIN-16
PIN-12
PIN-24
PIN-22
CW-LIMIT
+5V
ENC +5V
CCW-LIMIT
HOME-LIMIT
.0
0
1
.0
1
U
F
.0
0
1
.0
1
U
F
.0
0
1
1
0
K
1
0
K
1
0
K
10K
CONTROLLER
USER WIRING
10K
10K
.0
1
U
F
PIN-20
OPTIONAL HOME LIMIT
NORMALLY CLOSED LIMITS SHOWN
Figure 2-21:
End of Travel Limit Inputs
34
Chapter 2
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