Figure 31. Nsl Backplane - Mircom TX3 Series Installation And Operation Manual

5.3.7 Connectors
Up to 16 NSL backplanes connect to an NSL main controller board. Each has a
set of 16 positions for a jumper plug. The first backplane is jumpered for "1", the
next for "2", and so on up to "16".
P1. Expansion from the previous controller or the NSL main controller board.
P2. Expansion from the previous controller or the NSL main controller board.
P3 to P10. Connectors for the 2012 NSL Relay Boards. (eight relay boards per
backplane.)
P11. Expansion to the next backplane.
P12. Expansion to the next backplane.
NSL Backplane Number Selector. (located between P1 and P2).

Figure 31. NSL Backplane

Attention: High voltages are present on this board during the ringing of suite
Telephone Access System Installation and Operation Manual
66 (112)
LT-969 Copyright 2012
TX3-NSL-8M Relay Control Unit
telephones.
NSL Relay Cabinet Installation and Wiring
2016 NSL Unit Relay Backplane Boards
Version 1.6