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RDU Mk2 Installation & Programming Manual
Document No: LT0499
Installation & Wiring
Page 8-6
8 April 2015
Issue 1.02
Cable Limitations
The maximum distance to the furthest RDU is determined by the cable type used and the
wiring arrangement.
(1)
The MAXIMUM line resistance loop (FIP TX out, 0V return must not be greater than
150 Ω.
(2)
The MAXIMUM inter-wire capacitance at the FIP RZDU terminals, MUST NOT
exceed 100 nF. This should be the total of all cables used - not just the length to the
furthest RDU. Typically this is 1km of TPS cabling.
(3)
The +V and 0V cables must be of sufficient size to avoid excessive voltage drops to
RDUs when they are drawing maximum current (e.g., lamp test).
Содержание RDU Mk2
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