E-T-A PowerPlex Web Server WS300 - Powerplex System Undervoltage Protection; Table 3: Major Properties of the CAN Bus Cable to be Used; Table 4: Undervoltage Protection and Operating Voltage Range

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A CAN bus cable typically is a twisted pair cable with two wires, CAN-H and CAN-L, and shield SHLD. Table 3
lists the most important properties which the CAN bus cable to be used should have. They correspond to a typical
CAN bus cable.
Mechanical properties*
Diameter - inner conductor
0.97 mm
Nominal cross section
0.5 mm²
Conductor material
copper, blank
Structure of conductor
multi-stranded copper conductor
Number of cores
2
Total shield
tinned copper braiding
Core colours
CAN-H white
CAN-L: brown
Outer diameter of cable
7.0 mm
Colour of overjacket
purple
Mass
69 kg/km
Min. bending radius
laid out: 90 mm
static: 48 mm
Operating temperature
-40 °C … +70 °C (-40 … +158 °F)
Electrical properties*
Surge impedance
120 Ω
Conductor resistance
37 Ω/km max.
Insulation resistance
1 GΩ/km
Test voltage
1.5 kV
Other properties*
Resistance against ambient effects
UV resistant, weatherproof, oil-resistant, coolant-resistant, microbe-resistant
Mechanical strength
abrasion-proof, notch-resistant, low adhesion
Chemical resistance
acid- and alkali-proof
Thermal resistance
thermal load: 1.09 MJ/m
Table 3: Major properties of the CAN bus cable to be used
*) Fa. Helukabel: CAN.BUS 1X2X0.50, www.helukabel.de
Caution
Please make sure that beginning and end of the CAN bus network are closed off with a 120-Ω resistor.
Both the first and the last PowerPlex
®
component must have a 120-Ω terminating resistor. This is of
major importance for the correct and reliable function of the PowerPlex
®
installation.
3.6. PowerPlex
®
System Undervoltage Protection
The PowerPlex
®
system is fitted with undervoltage protection. If the supply voltage (battery voltage) drops below
a certain value (as shown in Table 4) all load outputs will be disconnected. This feature ensures a stable voltage
range in which the system can work.
Operating voltage
PowerPlex
®
system response
Below 8 V ± 0.5 V
disconnection of all load output
Above 10 V ± 0.5 V
standard operation
Table 4: Undervoltage protection and operating voltage range