Cable Parameters - Hitachi EH-RMP2 Applications Manual

Chapter 3 Installation
Figure 3.3.2-1 The connector type for EH-RMP2

3.3.3 Cable parameters

The bus cable is specified in EN 50170 part 8-2 as "Cable Type A", and should comply with the parameters in the
table below. Cable type B, which is also described in EN 50170, is outdated and should no longer be used.
Table 3.3.3-1 Cable parameters
Parameter Cable type A
Characteristic impedance 135 to 165 Ω at a frequency of 3 to 20MHz
Operating capacity < 30 pF/m
Loop resistance <= 100 Ω /km
Core diameter > 0.64 mm
2
Core cross-section*1 > 0.34mm
*1 The cable cross-sections used should be compatible with the mechanical specifications of the bus interface
connector.
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