Cable Specifications - Hitachi S10mini Hardware Manual

3 NAMES AND FUNCTIONS OF EACH PART AND CABLING

3.2.2 Cable specifications

The J.NET module requires two pairs of twisted-pair shield cables.
A polyethylene-insulated vinyl sheath cable for instrumentation should be used as the cable for
J.NET and J.STATION.
Interface Cable Specifications for KPEV-SB 2P 0.5 mm
Maximum conductor resistance (20°C)
Withstand voltage
Minimum insulation resistance (20°C)
Electrostatic capacity (1 kHz)
Characteristics impedance (1 MHz)
Note
The 1-MHz characteristics impedance of the above cable is 110 ohms but J.NET and
J.STATION have 120-ohm internal terminating resistors in consideration of other
transmission rates.
Short TERM terminals with a jumper when the J.NET module is used at an end of the
network.
120-ohm terminating resistors are connected in J.NET and J.STATION.
(Recommended Cable Type)
Item
3-6
2
of Hitachi Cable, Ltd.
Unit Measured value
Ω/km
34.0
VAC/minute 1000
MΩ • km 2500
PF/m 60
Ω
110