Design Method For Power Supply System With Through-Wiring - Omron NXR Series User Manual

Unit name
ILM1
ILM2
ILM3
From the above results, the voltage of each input power supply to each Unit is calculated as fol-
lows.
a. Voltage of each input power supply to ILM1
Voltage of each power supply = 24.0 V - Voltage drop in power supply cables = 24.0 V - 0.40 V
= 23.60 V
b. Voltage of each input power supply to ILM2
Voltage of each power supply = 24.0 V - Voltage drop in power supply cables = 24.0 V - 0.51 V
= 23.49 V
c. Voltage of each input power supply to ILM3
Voltage of each power supply = 24.0 V - Voltage drop in power supply cables = 24.0 V - 0.69 V
= 23.31 V
The above voltage values are acceptable because they meet the voltage specifications of each
power supply.
Also, confirm that the voltage values meet the voltage specifications of the connected IO-Link devi-
ces or non-IO-Link external devices. However, this confirmation is omitted in this example.
If the voltage specifications are not met, review the length of power supply cable and the connected
external devices.
4-2-3

Design Method for Power Supply System with Through-wiring

This section describes how to design the power supply system when the power supply method is pow-
er supply with through-wiring.
Procedure for Designing a Power Supply System with Through-wir-
ing
Confirm that the power supplies meet the following design conditions (a) to (c). Refer to the reference
sections for the confirmation method.
(a) The sum of the total current consumption from the Unit/input pow-
er supply and output power supply must not exceed the maximum
power supply current of the IO-Link Master Unit.
NXR-series IO-Link Master Unit for EtherCAT User's Manual (W640)
0.40 V (4 A is used because the cable length is 1 m and the total current consumption is 3.30
A.)
0.51 V (3 A is used because the cable length is 3 m and the total current consumption is 2.23
A.)
0.69 V (3 A is used because the cable length is 5 m and the total current consumption is 2.23
A.)
Design condition
4 Designing the Power Supply System
Voltage drop
Reference for confirmation method
Calculating the Total Current Consump-
tion in Power Supply with Through-wir-
ing on page 4-14
*1
4
4-13