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44
5 SYSTEM CONFIGURATION
5.2 Power Supply to the AnyWireASLINK System
Description of conditions 2 and 3
■
Vm: Supply voltage for the FX5-ASL-M
• Voltage: 21.6 to 27.6 V DC (24 V DC -10 to +15%), ripple voltage 0.5 Vp-p or lower
• Recommended voltage: 26.4 V DC (24 V DC +10%)
■
V(V): Cable-to-cable voltage drop
Calculation example
The example shows how to check whether the total length of 100 m is sufficient to configure a system in the following
conditions.
■
Condition
■
Calculation result
The calculation results of the conditions 1) to 3) show that the system cannot be configured.
However, the system can be configured if the power supply for the FX5-ASL-M is changed to 24.55 V DC or higher.
Calculation formula
Description
V(V) = Transmission cable supply current I(A)
Cable resistance R
(
)
■
Transmission cable supply current (I(A))
Page 43 Transmission cable supply current (I(A))
■
Cable resistance R (
)
= Cable length (m)
Conductor resistance (
/m)
2
• Wire diameter 1.25
Conductor resistance 0.015
/m
• Wire diameter 0.75
Conductor resistance 0.025
/m
Item
Description
Non-isolation slave module (Input ASLINKER)
Number of I/O points
2 points
Module current consumption
15 mA
Number of modules
24
Connected load (three-wire sensor)
Three-wire sensor current
consumption
13 mA
Number of sensors
2
Power supply voltage
24 V DC
10%
Transmission cable (DP, DN)
Wire diameter
1.25
Supply voltage for the FX5-ASL-M
Power supply voltage
24 V DC
Item
Calculation formula
Result
Condition 1
I(A) = (Ihin
m) = I(A)
The maximum transmission cable supply current
(0.015 + (0.013
2))
24 = 0.984 A
1 A
Satisfied
Condition 2
Vm(V) -
V(V)
20 V
24 - (0.984
100
0.015
2) = 24 - 2.95 = 21.05 V
20 V
Satisfied
Condition 3
Vm(V) -
V(V)
The lowest allowable voltage of the connected load
The lowest limit of the allowable voltage range for connected load = 24 - 24
0.1 = 21.6V
21.05 V < 21.6 V
Not satisfied
Содержание MELSEC iQ-F FX55-ASL-M
Страница 1: ...MELSEC iQ F FX5 User s Manual ASLINK ...
Страница 2: ......
Страница 12: ...10 INDEX 88 REVISIONS 90 WARRANTY 91 TRADEMARKS 92 ...
Страница 13: ...11 CONTENTS ...
Страница 23: ...3 PROCEDURES BEFORE OPERATION 21 3 MEMO ...
Страница 91: ...I 89 MEMO ...
Страница 95: ......