Panasonic AFPE224300 User Manual page 41

- Recommended cables for RS485 communication
Use the transmission cables shown below for the FP-e RS485 communication system.
Cable
Size
0.5 mm
Twist pair
(AWG20)
with shield
or more
0.75 mm
VCTF (AWG18)
or more
- RS485 wiring and terminal station setting
1. For the FP-e unit at RS485 terminal station, wire the transmission line (−) terminal and E-terminal using a
short circuit.
2. For RS485 transmission line, three or more pairs of cables should not be connected to one station.
3. When using shielded cables for RS485 transmission line, connect one end of the shielded cable to the
ground. Provide an exclusive ground for each FP-e power supply section and RS485 transmission shield
line. Do not share a ground with other lines.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
Conductor
Resistance
Material
(at 20 °C)
2
Max.
Polyethylene
33.4 Ω/km
2
Max.
PVC
25.1 Ω/km
Insulator
Thickness
Max.
0.5 mm
Max.
0.6 mm
*1. Use shielded type twist cables.
*2. Use only one type of the transmission cables.
Do not mix different types of the cables.
*3. Use twist pair cables under a bad noise environment.
*4. When connecting two cables to the "+" and "−"
terminals of the COM. port (RS485), use the above
cables of which conductor cross section is 0.5 to 0.75
2
mm , and the cross sections of two cables should be
the same.
Cable
Applicable cables
Diameter
HITACHI
Approx.
KPEV-S0.5 mm
7.8 mm
Belden Inc. 9207
Approx.
VCTF0.75 mm
6.6 mm
(JIS)
2
× 1P
2
× 2C
3-15