NH Series: Network Monitor & MP3 Voice Annunciator Signal Tower

June 29, 2021
PATLITE's signal tower monitors network systems and sends real-time alerts by visual signals, alarms, and email notifications.

Network monitoring and real-time notifications of predesignated events and device failures via visual signals, voice annunciation, and email alerts.


The NHL-FV Signal Tower monitors your network system and sends real-time alerts via visual signals, audible alarms, and email notifications. It has digital I/O features and supports a wide range of protocols, and can also be linked to Cloud services including Microsoft Azure Cloud or AWS. The NHL-FV enables you to consolidate your network and obtain wider visibility of the devices at your workplace. 

  • Built-in MP3 voice annunciator feature
  • Ping up to 24 devices and notify operators of ping failures in real time
  • The green LED unit can be configured to indicate the connection status between the NHL and your network
  • Standard configuration: light tower with 3 LED segments and a programmable audible alarm with volume settings
  • Alarms trigger emails to be sent to up to 8 addresses per event
  • The NHL supports SNMP, HTTP, PNS (Developed by PATLITE), Socket Transmission command protocols
  • Alarms can send SNMP traps to network management systems


  • Ping Device Monitor 
  • RSH Command
  • SNMP v1?v2
  • Self-diagnosis
  • Application Monitor
  • E-mail Transmission
 Dimensions 1.5 to 2 in. Ø (40 to 60 mm) Operating Voltages  24V DC (AC Adaptor 100 to 240V AC) Protocols Physical Layer: 10 BASE-T/100 BASE-TX
 Data Link Layer: CSMA/CD
 Network Layer: IP/ICMP/B6
 Transport Layer: TCP/UDP
 Application Layer:
 HTTP/RSH/SMTP/SNMP/POP/DNS/Socket/NTP/DHCP/SLMP Body Style steel casing, bumper pads, pre-assembled,
 mounted to converter base, interchangeable modules Body Color Off-white Tiers Up to 5 LED units Colors Red/Amber/Green Alarms Buzzer, chime, message (voice) Standards EN 50581; EN 55032, EN 55024; FCC Part15 Subpart B Class A, 
 ICES-003 Class A;  UL 1638, UL 464 CSA C22.2 No.205; 
 KN 61000-6-2, KN 61000-6-4; PSE Compliant AC Adaptor;
 CE Marking; UL/cUL Listed