Andrew Wireless Innovations Group RPT-NODEC843 用户手册

 

User’s Manual for Node C Network Elements

 

Page 74 

 M0121A1A_uc.doc

 

 
The external alarms are used to monitor the status of one or more external devices 
via the Node C. A UPS or entry alarm is among the items that might be connected to 
the contact relay and monitored via the Node C. The cage clamp connectors are 
located on the distribution & alarm board of the Interface Unit.  
 
Observe that the cross-sectional area of the wires to be connected must be in the 
range from 0.5 - 1.0 mm

2

. Do not use wire-end sleeves (wire cable ends). 

 

 

 

 
There are three external cage glands at the bottom of the Interface Unit, which may 
be used to connect the external devices.  
 
All external alarms are defaulted to high (5VDC) without connection. This setting may 
be changed on the external alarm page to active high or active low. The severity 
levels of the external alarms may be set via the web page. More information about 
the external alarm settings is available in the web page and online-help. 
 
When not all of the external alarms are required, make sure that the other alarms are 
set to active low or disable the alarm; otherwise the status will always show an alarm. 
The names for each external alarm are user-definable on the external alarm page 
(see chapter 4.2.4.4 Alarm Management) and it is suggested that they be renamed to 
indicate the use of these alarms.  
 

Input voltage range 

5VDC 

Recommended input line 

Potential free 

Nominal sink current to ground 

15mA 

Active level 

High or low set via software 

Connectors Cage 

clamps