Precedure 1 Wiring Of Transmission Cables - Panasonic MEWNET-F Technical Manual

5.3.2 Precedure 1 Wiring of Transmission Cables

Connect each station with transmission cables (2-wire cables).
For transmission cables, use a twisted pair cable or VCTF 0.75 mm2 x 2C (JIS) or equivalent.
The length of transmission cables should not be longer than the maximum transmission distance
(from a temrinal station to a terminal station) for each transmission line.
Connection method
1. Connection and wiring should be carried out from the master unit.
2. Wiring should extend from one unit to the next.Never run two wires from a single unit to two other
units.
3. When connecting the RS485 interface of each station, be sure to connect positive (+) to positive, and
negative (-) to negative. (Refer to the figure below.)
4. Connect one end of the shielded line of the transmission cable to the F.G. terminal, and ground it.
(Refer to the figure.)
Example of wiring
Reference: For information on the maximum transmission distance,
<3.4 Transmission Cable Specifications>
5-6
The left figure is the "Connection pattern
B".When connecting one transmission line,
use the port I for the master unit.