Mircom TX3 Series - Figure 53 Elevator Restriction Controller Board Wiring

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