Rs-422/485 Cable Specification - Mitsubishi Electric QJ71MB91 User Manual

3
SPECIFICATIONS

3.3.2 RS-422/485 cable specification

This section explains the specifications of RS-422/485 cable.
(1) RS-422/485 cable to be used
The RS-422/485 cable should meet the following specifications and used within
1200m(4592.4ft).
(2) When making a 1:n connection
When connecting to multiple devices (1:n), ensure that the overall distance is within
1200 m(4592.4ft).
(3) RS-422/485 cable specifications
Table3.2 RS-422/485 cable specifications
Item
Cable type
Number of pairs
Conductor resistance (20°C)
Insulation resistance
Dielectric withstand voltage
Electrostatic capacitance (1 kHz)
Characteristic impedance (100 kHz)
Recommended conductor size
Description
Shielded cable
88.0/km or less
10000M•km or more
500VDC, 1 minute
60nF/km or less by an average
0.2 mm
3.3 RS-422/485 Interface Specification
3.3.2 RS-422/485 cable specification
3P
110±10
2 2
to 0.75 mm
3
- 7
1
2
3
4
5
6
7
8