7-17
7.3.3 Cables
Please use the following cables for systems using RS485 type communication cassettes.
Appropriate electrical cables (twisted cables)
Conductor Insulator
Type
Cross-sectional
view
Size
Resist-
ance
(at 20°C)
Material
Thick-
ness
Cable
diam.
Sample
appropriate
cable
1.25 mm
2
(AWG16)
or greater
Max.
16.8
Ω/km
Polye-
thylene
Max.
0.5 mm
Approx.
8.5 mm
Belden 9860
Hitachi Cable,
Ltd. KPEV-
S1.25 mm
2
x
1P
Shielded
twisted
pair
0.5 mm
2
(AWG20)
or greater
Max.
33.4
Ω/km
Polye-
thylene
Max.
0.5 mm
Approx.
7.8 mm
Belden 9207
Hitachi Cable,
Ltd. KPEV-
S0.5 mm
2
x
1P
VCTF
0.75 mm
2
(AWG18)
or greater
Max.
25.1
Ω/km
Polychlo-
rinated
biphenyl
Max.
0.6 mm
Approx.
6.6 mm
VCTF-0.75
mm
2
x 2C(JIS)
Note:
• Use shielded twisted pair cables.
• Use only one type of transmission cable. Do not mix more than 1 type.
• Twisted pair cables are recommended in noisy environments.
• When using shielded cable with crossover wiring for the RS485 transmission line, grounded one end.
• If two wires are connected to the plus terminal and minus terminal of the RS485 of AFPG806 (COM4),
use the wires of the same cross-sectional area which is 0.5 to 0.75 mm
2
.