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Manual 35116
505HT for Pelton Turbines
Woodward
26
CAN Cable Specifications
Belden YR58684 (Woodward PN 2008-1512) communications / CAN cable is approved and
recommended. This is a smaller and more flexible 0.3 mm² / 22 AWG, low capacitance cable suitable for
tight routing in industrial environments.
Table 2-6. CAN Cable Specifications
Belden YR58684, bulk cable (Woodward PN 2008-1512)
Impedance 120
Ω
±10 % at 1 MHz
DC resistance 17.5
Ω
per 1000 ft
Cable capacitance: 11 pF/ft at 1 kHz
Data Pair: 0.3 mm² / 22 AWG, 7 strands, individually tinned, FEP insulation (BLUE,
WHITE twisted pair)
Ground: 0.3 mm² / 22 AWG, 7 strands, individually tinned, FEP insulation (BLACK)
Drain / Shield Wire: 0.3 mm² / 22 AWG, 7 strands, individually tinned
Shielding: Foil 100 % with outer Braid 65 %
Jacket: FEP Insulation, BLACK
Cable type: 1.5 pair, twisted shielded
Outer Diameter: 0.244 inch
Bend Radius: 2.5 inches
Temperature: –70 °C to +125 °C
Similar Cable: Belden 3106A (has different colors & lower temperature specs)
CAN Wiring / Shield Terminations & Limitations
For robust communications performance, the CAN cabling needs to minimize the exposed, non-shielded
cable section that occurs at terminal blocks. The exposed length of CAN wiring must be limited to less
than 3.8 cm / 1.5 inches from the end of the shield to the terminal block.
CAN shields are terminated to chassis (EARTH) through a capacitor-resistor network. This is designed
into the Flex500 / 505 hardware products. However, the shield must also be directly terminated to chassis
(Earth) at one point in the network. In the case of Woodward equipment, the direct ground is meant to be
located at the master device end, as it exits the master device’s enclosure.
Always use shielded cables for improved communications in
industrial environments. Wire terminations should expose as little un-
shielded cable as possible (less than 3.8 cm / 1.5 inches).
Communications (RS-232/RS-485)
An isolated, configurable RS-232 / 485 serial port is available for customer use, as configured by the GAP
software application. RS-422 communications is NOT supported.
Released
Содержание 505HT
Страница 23: ...Manual 35116 505HT for Pelton Turbines Woodward 21 Figure 2 2 505D Outline Drawing Released...
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Страница 197: ...Manual 35116 505HT for Pelton Turbines Woodward 195 Revision History New Manual Released...
Страница 198: ...Manual 35116 505HT for Pelton Turbines Woodward 196 Declarations Released...