ABB RET670 - Data on RS485 Serial Communication Module Cable; Installing the GPS Antenna; Antenna Installation

ExV is supplied by the Node at end of the Bus Segment
The specifications of the components are:
a) Ru + 5 V to Signal B = 390 W, 0.25 W ±2.5%
b) Rt Signal B to Signal A = 220 W, 0.25 W ±2.5%
c) Rd Signal A to GND = 390 W, 0.25 W ±2.5%
2.3.3 Bus power distribution
The end node in each Ph-segment applies 5 V bus excitation power to the Termination network via
the Excitation pair (ExV+ and GND) used in the Type 3 Physical layer specification.
5.6.3 Data on RS485 serial communication module cable
Type: Twisted-pair S-STP (Screened – Screened Twisted Pair)
Shield: Individual foil for each pair with overall copper braid
Length: Maximum 1200 m (3000 ft) from one system earth to the next system earth
(includes length from platform point to system
earth on both sides)
Temp: According to application
Impedance: 120 W
Capacitance: Less than or equal to 42 pF/m
Example: Belden 9841,Alpha wire 6412, 6413
5.7 Installing the GPS antenna
5.7.1
Antenna installation
The antenna is mounted on a console for mounting on a horizontal or vertical flat
surface or on an antenna mast.
Section 5 1MRK 504 088-UEN C
Installing the IED
70
Installation and commissioning manual