Eclipse Security Nubix User Manual page 18

*What are N/O (Normal Open), N/C (Normal Close)?
This is a terminology explaining operation method of Sensor. N/O Sensor is that
contact maintains Open status in normal condition and contact is converted to Close
status with beginning operation. Oppositely, N/C Sensor operates while contact
maintaining Close status converts to Open status.
SENSOR
Sensor In : Connect the sensors.
Sensor Out : Connect the external electric devices.
3) Connecting with PC using LAN cable
If you want to connect DVR to PC directly, use Cross Cable(1), and if you want to
use HUB, use Direct Cable(2).
*Hub : This is a device connecting one office to devices located near with using
cable when you organize LAN
*Direct Cable : This is standard UTP cable used for communication among
devices through Hub and others when you organize LAN
*Cross Cable : This is a cable that has changed internal array of standard UTP
Cable for direct communication among devices not using connection
devices like Hub when you organize LAN
CH 2 Installation Method and Cautions
SIREN
① Cross Cable
② Direct Cable
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POWER
PC
HUB