6 BASE UNIT AND EXTENSION CABLE
List for Calculating Voltage Drops Occurring at Extension Cables in System Consisting of Extensions 1 to 7
Q5B |
| Voltage Drop at Extension Cable on Corresponding Extension Unit |
| Sum Total of Voltage | |||||
Loading |
|
|
|
|
|
|
| Drops to "IN" Connector | |
V1 | V2 | V3 | V4 | V5 | V6 | V7 | |||
Position | of Q5B (V) | ||||||||
|
|
|
|
|
|
| |||
Extension | R1 • I1 | V=V1 | |||||||
stage 1 | |||||||||
|
|
|
|
|
|
|
| ||
Extension | R1(I1+I2) | R2 • I2 | V=V1+V2 | ||||||
stage 2 | |||||||||
|
|
|
|
|
|
|
| ||
Extension | R1(I1+I2+I3) | R2(I2+I3) | R3 • I3 | V=V1+V2+V3 | |||||
stage 3 | |||||||||
|
|
|
|
|
|
|
| ||
Extension | R1(I1+I2+I3+I4) | R2(I2+I3+I4) | R3(I3+I4) | R4 • I4 | V=V1+V2+V3+V4 | ||||
stage 4 | |||||||||
|
|
|
|
|
|
|
| ||
Extension | R1(I1+I2+I3+I4 | R2(I2+I3+I4+I5) | R3(I3+I4+I5) | R4(I4+I5) | R5 • I5 | V=V1+V2+V3+V4+V5 | |||
stage 5 | +I5) |
|
|
|
|
|
|
| |
Extension | R1(I1+I2+I3+I4 | R2(I2+I3+I4+I5 | R3(I3+I4+I5+I6) | R4(I4+I5+I6) | R5(I5+I6) | R6 • I6 | V=V1+V2+V3+V4+V5+ | ||
stage 6 | +I5+I6) | +I6) |
|
|
|
|
| V6 | |
Extension | R1(I1+I2+I3+I4 | R2(I2+I3+I4+I5 | R3(I3+I4+I5+I6 | R4(I4+I5+I6+I7) | R5(I5+I6+I7) | R6(I6+I7) | R7 • I7 | V=V1+V2+V3+V4+V5+ | |
stage 7 | +I5+I6+I7) | +I6+I7) | +I7) |
|
|
|
| V6+V7 | |
The voltage supplied to "IN" connector of the Q5B in the final extension reaches 4.75 VDC or higher on the condition that the sum total of voltage drop to "IN" connector of Q5B (V) is 0.15V or lower.
(2)When the Q6
B is connected between the Q3
B and the Q5
B
(a) Selection condition
4.75VDC or higher should be supplied to the "IN" connector of the Q5B in the final extension.
(b) How to calculate voltage to "IN" connector
The 5VDC output voltage of the power supply module on the main base unit is set to at least 4.90VDC.
Therefore, the Q5B can be used if the voltage drop is 0.15VDC or lower (4.9VDC - 4.75VDC = 0.15VDC).
[When the Q5
B is connected to Extension stage 2.]
Extension Cable
Extension Cable
Main base unit (Q3
B)
Type
Conductor
Power supply module
Extension base unit (Q6
B)
R1
Power supply
Vmodule
Extension base unit (Q5
B)
I1
Extension stage 1
Extension stage 2
Resistance (
)
QC05B0.044
QC06B0.051
QC12B0.082
QC30B0.172
QC50B0.273
QC100B0.530
Symbol | Description | |
V | Voltage drop at the extension cable between the main base unit and extension base unit (Q5B) | |
| 5VDC current consumption when the Q5B is used as Extension n+1, n = 1 to 6, n: Extension No. of Q6B | |
In | connected | |
(Sum total of current consumed by Q5B and currents consumed by the I/O, intelligent function modules | ||
| ||
| loaded on the Q5B.) | |
Rn | Extension cable resistance between the main base unit or the extension base unit (Q6B) and the extension | |
base unit (Q6B) | ||
| ||
Rn+1 | Extension cable resistance between the extension base unit (Q6B) and extension base unit (Q5B) | |
6 - 9 | 6 - 9 |