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5.3
Wiring the TX3-NSL-8M Main Controller Board
The TX3-NSL-8M NSL Main Controller Board has both ribbon cable sockets
and screw terminals.
Attention: High voltages are present on this board during the ringing of suite
Figure 40 shows the general layout of the TX3-NSL-8M Main Controller board
components.
TX3-NSL-8M Relay Control Unit
Figure 40. TX3-NSL-8M Main Controller Board
5.3.1
Connectors
USB. Computer connection for firmware download.
P3. Not used.
P4. Expansion to the NSL Controller back-plane.
Telephone Access System Installation and Operation Manual
Version 3.7
LT-969
Copyright January 2017
telephones.
P6
SW2
1
JW3
JW4 JW2
TX3-NSL-8M Main Controller Board
NSL Relay Cabinet Installation and Wiring
Expansion Connectors
P4
R
P5
Res.
T
R
Co.
T
R
T
P3
8
JW1 JW5
16V AC
USB
IN
ON OFF
SW1
Telephone Line
from Lobby Panel
Main Controller
Board
73 (119)
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