Wiring The Com Port - Panasonic GT32-R User Manual

3.3 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. The wiring shown below should be used.
Applicable wiring (twisted wiring)
Size
AWG 28 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
N· m or less.
When doing RS485 communication using RS422 type
Please use the following cables or equivalent.
Appropriate electrical cables (twisted cables)
Cross-sectional
Type
view
Shielded
twisted
pair
Note:
 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.
3-12
Conductor cross-section surface area
0.08 to 1.25 mm
Conductor
Size
2
1.25 mm
(AWG16)
or greater
2
0.5 mm
(AWG20)
or greater
2
Insulator
Resist-
ance Material
(at 20C)
Max.
Polye-
16.8
thylene
Ω /km
Max.
Polye-
33.4
thylene
Ω /km
Sample
Cable
appropriate
Thick-
diam.
ness
Belden 9860
Hitachi Cable,
Max. Approx.
Ltd. KPEV-
0.5 mm 8.5 mm
S1.25 mm
Belden 9207
Hitachi Cable,
Max. Approx.
Ltd. KPEV-
0.5 mm 7.8 mm
S0.5 mm
cable
2
x
1P
2
x
1P