Mitsubishi Electric MELSEC iQ-R Series Configuration Manual page 120

■ When the Q6B is connected between the RQ extension base unit and the Q5B
The 5VDC output voltage of the power supply module on the Q6B is set to 4.90VDC (minimum value).
Therefore, the Q5B can be used when the voltage drop at the extension cable is 0.15VDC or lower (4.90VDC - 4.75VDC =
0.15VDC).
V
Rn
Rn+1
In
Diagonal lines show the power supply modules.
Symbol
V
In
Rn
Rn+1
Mounting position
Q6B
Extension level 2
Extension level 2 to 3
Extension level 3 to 4
Extension level 4 to 5
Extension level 5 to 6
5 INSTALLATION AND WIRING
118
5.5 Connection Method for the Extension Base Unit
Main base unit
RQ extension base
unit
Q6 B Extension level n
Extension level n+1
Q6 B
Q5 B Extension level n+2
Description
Voltage drop at the extension cable between the RQ extension base unit and the Q5B
Current consumption (5VDC) when the Q5B is used as the extension level n+2 (n = 1 to 5), n: Extension level for the Q6B
(Sum total of the current consumption by the Q5B and current consumption by I/O modules and intelligent function modules
mounted on the Q5B)
Resistance value for the extension cable between the RQ extension base unit and the Q6B or the Q6B and the Q6B
Resistance value for the extension cable between the Q6B and the Q5B
Q5B
Extension level 3
Extension level 4
Extension level 5
Extension level 6
Extension level 7
Sum total (V) of the voltage drop at the extension cable from the main
base unit to the IN connector of the Q5B
V=(R1+R2)I1
V=(R1+R2+R3)I2
V=(R1+R2+R3+R4)I3
V=(R1+R2+R3+R4+R5)I4
V=(R1+R2+R3+R4+R5+R6)I5