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6.3.6
RS-485
Figure 53 shows the RS-485 elevator restriction unit wiring.
Input
- S +
USB
Figure 53. Elevator Restriction Controller Board Wiring
98 (119)
Telephone Access System Installation and Operation Manual
LT-969
Copyright January 2017
16 VAC
Output
IN
- S +
Twisted Shield Pair
18 AWG
18 AWG
Twisted Shield Pair
Elevator Restriction Unit Installation and Configuration
PS-4P Transformer
(located in electrical room)
18 AWG
Daisy chain one to one
connection (+ to +, S
to S and - to -) to next
RS-485
DO NOT T-TAP
Version 3.7
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