EasyManuals Logo

Procentec ComBricks User Manual

Procentec ComBricks
219 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #134 background imageLoading...
Page #134 background image
ComBricks User Manual v6.4.0 | January 18| © PROCENTEC 134/219
12.5.5 Voltage at the end of the segment
The resistance of the cable causes a lower voltage at the end of the cable. At least 9V should be available for
the last device at the end of the cable. The following calculation is a ‘worst case’ scenario where all devices are
connected at the end of the cable:
Fig. 89 - Example of voltage calculation at the end of the cable
In this example the voltage at the end of the cable is 24 V - (0.05A * 44 * 1.5) = 20.7 V
Trunk line = 1450 m
U
S
= 24 V
U
B
> U
MIN
L
SEG
= 1500 m
I
SEG
= 50 mA
10 m20 m20 m
U
B
= U
S
(I
SEG
* R
CABLE
* L
SEG
) (where U
B
> U
min
)
U
B
= Bus voltage at the last device (V)
U
S
= Voltage of the segment coupler (V)
I
SEG
= Total current In a segment (A)
R
CABLE
= Resistance per unit length of the cable (/km)
L
SEG
= Length of all cables in the segment, including stubs (km)
U
min
= Minimal specified operating voltage of the last device (V)
I
B1
= 10 mA I
B2
= 12 mA I
B3
= 18 mA
I
S
= 500 mA
I
SEG
< I
S
I
FDE
= 10 mA
I
SEG
= 60mA
I
B0
= 10 mA
Fig. 88 - Example of current consumption calculation in a PA segment

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Procentec ComBricks and is the answer not in the manual?

Procentec ComBricks Specifications

General IconGeneral
BrandProcentec
ModelComBricks
CategorySwitch
LanguageEnglish