MITSUBISHI ELECTRIC QJ71C24N - Manual (Page 57)

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MELSEC-Q
3 SPECIFICATIONS
3.3.2 RS-422/485 cable specifications
The following shows the RS-422/485 cable specification.
(1) Use a 1200 m (3937 ft.), or shorter, cable that satisfies the following specification
for the RS-422/485 cable (cable to connect the Q series C24 terminal block).
(2) Make the total distance within 1200 m (3937 ft.) when two or more device are
connected in a 1:n or m:n configuration.
(3) The RS-422/485 cable specification is shown below.
Item Description
Cable type Shielded cable
Number of pairs 3P
Conductor resistance (20 C
°
) 88.0 /km or less
Insulation resistance 10000 M - km or more
Dielectric strength 500 V DC, 1 minute
Electrostatic capacitance (1 kHz) 60nF/km or less on average
Characteristic impedance (100 kHz) 110 ± 10
(Recommended cable)
SPEV (SB)-MPC-0.2 3P ..... (MITSUBISHI CABLE INDUSTRIES, Ltd.)
SPEV (SB)-0.2 3P
..............
(MITSUBISHI CABLE INDUSTRIES, Ltd.)
SPEV (SB)-MPC-0.2 3P and SPEV (SB)-0.2 3P have the same electrical
characteristics, but different external diameter and internal wire colors.