8 Pulse Output Units
8 - 16
NX-series Position Interface Units User’s Manual (W524)
Wiring Example for Servo Drives
Note 1. The pulse output, external output, and external inputs are all NPN connections.
2. To supply power to connected external devices, connect an 24-VDC I/O power supply to the Communi-
cations Coupler Unit or an Additional I/O Power Supply Unit to supply power to the Pulse Output Unit.
The pulse output from an NX-PG0112 Pulse Output Unit is an NPN output. The common side
(0 VDC) is internally connected to 0 VDC of the I/O power supply. Refer to A-1 Datasheets on
page A-2 and A-1-4 Pulse Output Units on page A-22 for details.
When you connect a Pulse Output Unit to a Servo Drive, use a 24-VDC input for the pulse input
on the Servo Drive. If there is no 24-VDC pulse input, connect an external current-limiting resis-
tor so that the current matches the input specifications of the Servo Drive.
Pulse
Output Unit
I/O power
supply
(24 VDC)
Additional I/O
Power Supply Unit
Servo-
motor
Input Unit
Output Unit
Current-limiting resistor
Sensor 1
Sensor 2
Servo
Drive
Pulse: 2
In: 1
Out: 2
NC
I0
IOG
B
IOV
NC
IOV
NC
I1
IOG
I0
IOV
IOG
I2
IOV
IOG
I1
IOV
IOG
I3
IOV
IOG
IOV IOV
IOG
IOV
IOG
IOG
IOV
IOG IOV IOV
O0
IOV
IOG
O2
IOV
IOG
O1
IOV
IOG
O3
IOV
IOG
A
IOV
O0
IOV
R (current-limiting resistor)
Pulse Output Unit
Drive
I/O power supply
(24 VDC)
Pulse input +
Pulse input −
I/O power supply
(0 V)