OPERATION MANUAL CompoBus/S

Supplying Power to the Slaves Section 2-3
36
Master
Power supply
(24 V DC)
Master
Power supply
(24 V DC)
4-conductor VCTF Cables
Ambient temperature (°C) 0 5 10 15 20 25 30 35 40 45
Allowable current (A) 7 7 7 7 7 7 7 6 5.5 4.5
Special Flat Cables
Ambient temperature (°C) 0 5 10 15 20 25 30 35 40 45
Allowable current (A) 13 12 11 10 8 7 6 5 4 3
The total current supplied to the Slaves must be less than the allowable
current, regardless of whether the system has a main line distinguished
from the branch lines or not.
Slave
Current: I 1
Slave
Current: I2 For example, at 30°C the total current consumption of the Slaves must be
6 A or less when Special Flat Cable is used.
2. Extension Connector or T-joint’s Allowable Current
The allowable current through an Extension Connector is 4 A and that
through a T-joint is 3 A. Therefore, the total current supplied to the Slaves
beyond the Extension Connector or T-joint must be less than 4 A, regardless
of whether the system has a main line distinguished from the branch
lines or not.
Extension Connector
I1 +I2 + ... +IN ≤ 4 A
(I1 , I2 , IN : current consumption of each Slave after Extension Connector)
T-joint
I1+I2+ ... +IN ≤ 3 A
(I1, I2, IN: current consumption of each Slave after the T-joint.)
Example
Extension Connector used
Extension Connector
Slave
Slave
Current: I 1
Slave
Current: I 2
Slave
Current: I N
Current consumption of Slaves beyond
the Extension Connector
Slave
Current: I N
Terminator
Terminator
Note When a commercially available terminal block is used, be sure the
current consumption is within the allowable current of the block.