Chapter 1: Introduction 
NS3552-8P-2S-V2 User Manual  15 
Back pressure for half-duplex 
 
K bytes 
 
5 seconds: System reboot 
5 seconds: Factory Default 
 
 
 
-mount kit 
 
-pin terminal block for power input 
Pin 1/2 for Power 1, Pin 3/4 for fault alarm, Pin 5/6 for Power 2
 
-pin terminal block for DI/DO interface 
Pin 1/2 for DI 1 & 2, Pin 3/4 for DO 1 & 2, Pin 5/6 for GND
 
 
One relay output for power failure. Alarm relay current carry ability: 
 
 VDC 
 
 
-24~2.1 V (±0.1 V) 
Level 1: 2.1~24 V (±0.1 V)
 
Input load to 24 VDC, 10 mA max.
 
 
 
Open collector to 24 VDC, 100 mA max.
 
 
 
Power 1 (Green) 
Power 2 (Green) 
Fault Alarm (Green) 
Ring (Green) 
Ring Owner (Green) 
10/100/1000T RJ45 Ports: 
PoE in-use (Orange) 
1000 LNK/ACT (Green) 
 
100 LNK/ACT (Orange) 
1000 LNK/ACT (Green) 
 
 x 72 mm 
 
 
 
C 48 V 
Consumption 
W / 108.78 BTU (full loading without PoE function) 
W / 1043.46 BTU (full loading with PoE function)  
 
 
 
 
 
 
02.3af/802.3at PoE / PSE 
 
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