92
(3) When the GOT is bus-connected
(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).
Extension cable type
Extension cable conductor
resistance
QC05B 0.044
QC06B 0.051
QC12B 0.082
QC30B 0.172
QC50B 0.273
QC100B 0.530
Symbol Description
V Voltage drop at the extension cable between the main base unit and extension base unit (Q5B)
In
5VDC current consumption when the extension base unit (Q5B) is used as Extension n+1,
n = 1 to 5, n: Extension number of the extension base unit (Q6B) connected
(Sum total of current consumed by Q5B and currents consumed by I/O, intelligent function modules loaded on the Q5B)
Im
5VDC current consumption of the GOT (current consumption per GOT is 255mA)
• Im = 255 × c (c: Number of GOTs connected (c: 1 to 5))
Rn
Extension cable resistance between the main base unit and extension base unit (Q6B) or the extension base unit (Q6B)
and extension base unit (Q6B)
R
n+1
Extension cable resistance between the extension base unit (Q6B) and extension base unit (Q5B)
R1
V
R2
Im
GOT GOT
Power
supply
module
Power
supply
module
Extension
stage 1
I1
Extension
stage 2
Extension
stage 3
[When the Q5B is connected to Extension stage 2.]
Main base unit
Extension base unit (Q6B)
Extension base unit (Q5B)
Number of connectable GOTs: up to 5
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