NT1 ACE User Manual
Short Passive Bus Configuration
This configuration allows you to connect up to eight TEs at any point on the bus. The bus length is limited to 600 feet, as shown in Figure 5. To select the Short Passive Bus configu- ration, the CONFIGURATION switch must be set to the SHORT position. The bus terminating resistors can be placed at any point along the bus. If the TEs have internal terminating resistors that can be optioned, only one TE’s termination resistor should be enabled. The TERMINA- TION switch should be placed in the 100 position, and only one of the TEs connected should be terminated with 100 ohm. If the unterminated TEs are placed within 20 feet of the NT1, the TERMINATION switch should be in the 50 position, and the TEs should not be terminated. These switch settings should always be maintained, unless an external 100 ohm resistor is being used. If an external termi- nating resistor is used, set the TERMINATION switch to the NONE position.
600 Feet
TR
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* | NT1 |
TR |
*Not needed if NT1's Termination Resistors (TR) are used.
Figure 5. Short Passive Bus Configuration
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