21
2-2
EXT-IN Connector
The EXT-IN (external input) connector is used for wiring external inputs.
Since the C500-NC222-E Position Control Unit allows dual axis control, the
EXT-IN connector provides inputs for both X and Y axes for connecting in-
puts from limit switches, from switches to stop the system, and from the me-
chanical origin. The connector type and pin layouts are shown below.
1 2
3 4
5
6
7 8
9
10
1
1
12 13 14
15
16
2.6x3=7.8
2.6x5=13.0
6.1
2.6
2.6
3 3
(Layout shown from connected side)
Pin Functions
Name
0 V
X-axis CCW limit
X-axis external interrupt
X-axis origin
X-axis emergency stop
X-axis CW limit
Frame ground
24-V input
–
0 V
Y-axis CCW limit
Y-axis external interrupt
Y-axis origin
Y-axis emergency stop
Y-axis CW limit input
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
DC GND
CCWLX
STPX
ORGX
EMGX
CWLX
FG
+24V
+24V
–
DC GND
CCWLY
STPY
ORGY
EMGY
CWLY
Description
Ground (0 V) terminal for external 24-VDC power supply
Limit switch input for X-axis in CCW direction (NC)
Used for stopping X axis earlier than normal deceleration
stop (NO). Active at its leading edge.
Used as X-axis mechanical origin (NO).
Used to stop X axis in an emergency such as a run-away
motor (NC).
Limit switch input for X axis in CW direction (NC)
Ground terminal
Positive (+24 V) terminal for external 24-VDC power sup-
ply
Unused
Ground (0 V) terminal for external 24-VDC power supply
Limit switch input for Y axis in CCW direction (NC)
Used for stopping Y axis earlier than normal decelera-
tion-stop (NO). Active at its leading edge.
Used as Y-axis mechanical origin (NO).
Used to stop Y axis in an emergency such as a run-away
motor (NC).
Limit switch input for Y axis in CW direction (NC)
EXT-IN Connector
Section 2-2
