Wiring The Com Port - Panasonic GT703 User Manual

3.2.3 Wiring the COM Port

 Accessory communication connector/applicable wiring
The communication connector used for the COM port (provided as an accessory with the
main unit) has a screw-tightening type of terminal block. Use the following items for wiring.
 Suitable wires (strand wire)
Size
AWG28 to 16
 Use a special tool to tighten the terminal block of the communication connector.
Use a screwdriver made by us. (Product number: AFP0806) The tightening torque should be
0.22 to 0.3 Nm.
 When doing RS485 communication using RS422 type
Please use the following cables or equivalent.
 Suitable wires (strand wire)
Classification Cross-sectional view
Shielded
twisted pair
• Use shielded twisted pair cables.
Use only one type of transmission cable. Do not mix more than 1 type.
•
• When using shielded cable with crossover wiring for the RS485
transmission line, grounded one end.
Cross-sectional area
2
0.08 to 1.25mm
Conductor
Resistance
Size
(at 20 °C)
2
1.25 mm
（AWG16）
16.8 Ω/km
or more
2
0.5 mm
(AWG20)
33.4 Ω/km
or more
3.2 Wiring the Power Supply
Insulator
Thick-
Material
ness
Max. Max.
Poly-
ethylene
0.5mm
Max. Max.
Poly-
ethylene
0.5mm
Cable Sample
diam. appropriate cable
Hitachi Cable, Ltd.
Approx.
2
KPEV-S1.25mm
×1P
8.5 mm
Belden 9860
Hitachi Cable, Ltd.
Approx.
2
KPEV-S0.5mm
×1P
7.8mm
Belden 9207
3-7