5. MEMORY ICs BATTERY, CABLES AND DIN ADAPTER
--------------------
MELSEC-A
I
•
5.3
Cables
This section describes the specifications recommended for
the
cables used
for the
A2C.
(1)
5-core flat cables
Used to connect the
A2C system modules arranged side by side. The
cables are used
for
data communication and supply of 24 VDC. Table
5.3 shows specifications of 5-core flat cables.
Table 5.3
Specifications
of
s-core
Flat
Cables
Type
A2C-005
Connecting
o to 34 mm (1.34 in)
distance
Allowable
current
2A
Conductor
0.212
resistance
Insulation
15
MQ/km
or
over
resistance
Withstanding
200
VAC
voltage
95
mm (3.74 in)
SDA RDA
I
SG
SG
r
Sh.p.
SDBS]
I
RDB
+24V
I
+24V
24G
I
24G
::>J
(2) Twisted-pair cables
Used
for
data communication in the A2C system.
Table
5.4
shows specifications of applicable twisted-pair cables.
Table
5.5
Specifications
of
Twisted-pair
Cables
Item
Specification
Type
of
cable
Shielded
twisted-pair
cable
Number of pairs 2
pairs
or
more
For 0.3 mm
2
or less in
section:
50 m
(164.05
tt)
Connecting
distance
For
0.5
mm
2
or
more
in
section:
100
m (328.1 tt)
Conductor
resistance
88.0
Q/km
or
less
Electrostatic capacity Average 60 nF/km or less
Characteristic
impedance
110 ±
109
5-5
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