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6. BASE UNIT AND EXTENSION CABLE
6 - 2
MELSEC-A
6.1.2 Specifications of extension cables
Table 6.3 shows the specifications of the extension cables which can be used for
the AnSHCPU system.
Table 6.3 Extension cable specifications
Model
Item
A1SC01B A1SC03B A1SC07B A1SC12B A1SC30B A1SC60B A1SC05NB A1SC07NB A1SC30NB A1SC50NB
Cable length
[m (ft.)] 0.055
(0.18)
0.33
(1.08)
0.7
(2.3)
1.2
(3.94)
3.0
(9.84)
6.0
(19.68)
0.45
(1.48)
0.7
(2.3)
3.0
(9.84)
5.0
(16.14)
Resistance of
5 V DC
supply line
(
Ω
at 55
°
C)
0.02 0.02 0.04 0.06 0.12 0.18 0.04 0.05 0.12 0.18
Application Connection between main base unit and A1S5[ ]B (S1)/A1S6[ ]B (S1)
Connection between
main base unit and
A5[ ]B/A6[ ]B
Connection between
main base unit and
A5[ ]B/A6[ ]B
Weight [kg] 0.025 0.01 0.14 0.20 0.40 0.65 0.20 0.22 0.4 0.56
6.1.3 Application standards for extension base units (A1S52B(S1), A1S55B(S1), A1S58B(S1),
A52B, A55B, A58B)
When an extension base unit of one of the models A1S52B(S1), A1S55B(S1),
A1S58B(S1), A52B, A55B, or A58B is used, make sure a voltage of 4.75 V or
higher is supplied to the receiving end (at the module installed in the last slot of the
extension base unit).
With the A1S52B(S1), A1S55B(S1), A1S58B(S1), A52B, A55B, and A58B
extension base units, 5 V DC is supplied from the power supply module of the main
base unit via an extension cable. Therefore, some voltage drop occurs in the
extension cable and the specified voltage may not be supplied to the receiving end,
resulting in incorrect operation.
If the voltage at the receiving end is less than 4.75 V, use an extension base unit of
one of the models A1S65B(S1), A1S68B(S1), A62B, A65B, or A68B, equipped with
a power supply module.
(1) Selection conditions
The voltage received by the module installed in the last slot of an
A1S52B(S1), A1S55B(S1), A1S58B(S1), A52B, A55B, or A58B extension
base unit must be 4.75 V or higher.
Since the output voltage of the power supply module is set at 5.1 V or higher,
the voltage drop must be 0.35 V or less.