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Wednesday, May 16, 2007

Page 2

Green = Power 

okay

Green = U-Net port active

Green = U-Net hub receiving 
data from SC-4/400

8) U-Net 

Terminators are 

supplied. USI 

Part # 65324-04

The U-Net control bus supports a maximum of 255 control panels. The 

use of a U-Net hub does not increase the total number of panels 

supported, it only increases the potential length of the U-Net CAT-5 cable. 

Connect to U-Net port on 

the SC-4 or SC-400 frame 

using standard CAT-5 

cable. Maximum length 

from SC-4/400 frame to this 

connection 1000'.

Redundant power 

supply connectors.

Each port may have up to 32 control panels 

and a maximum of 1000' of CAT-5 cable. All 

ports must be terminated either on the U-Net 

hub or the control panel.

SC Control System

U-Net

Hub

Router 

Control 

Panel

Router 

Control 

Panel

Router 

Control 

Panel

Cat-5 

Cable

U-Net 

Terminator

Port 1

Po
rt 0

Po
rt

 5

Port 2

Port 6

U-Net Terminator

Por
t 3

Po
rt 4

Router 

Control 

Panel

Port 8 Port 7

U-Net 

Terminator

USI Part #80263-2

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