NTP to IRIG-B Converter
50 OHMS BNC, RS-422, RS-485, RS-232

VCL Products > NTP to IRIG-B, PTP to IRIG-B > VCL-3045, NTP to IRIG-B Converter
NTP to IRIG-B Converter
NTP to IRIG-B Converter
NTP to IRIG-B Converter
NTP to IRIG-B Converter
NTP to IRIG-B Converter
NTP to IRIG-B Converter


3D View
BNC 3D View
RS-485 / RS-422 3D View
RS-232 Mechanical
Drawing (PDF)

VCL-3045, NTP to IRIG-B Converter
IRIG-B options: 50 Ohms BNC, RS-422, RS-485, RS-232 Twisted Pair

Get Data Sheet

VCL-3045 is synchronized by an NTP Server and can be used as a time source for equipment that requires IRIG-B inputs for time-of-day synchronization.

  • Isolates and Secures.
  • Isolates the time-synchronization input of IEDs such as the Protection Relays and RTUs from the IP network.
  • The IRIG-B interface remains the only connection between the VCL-3045 and the Protection Relay / RTUs, thereby providing maximum security and isolation to IEDs an IP network from external hostile elements.
  • Enables flexibility in installation
  • Enables secure and compact installations
  • Increases reliability, availability and accuracy.
  • Provides flexibility of usage and enhanced efficiency allowing for maximum utilization of the available resources.

Features and Benefits:

  • May be synchronized from a local or public NTP server
  • Provides 4 Unmodulated IRIG-B output (BNC, RS232, RS485 / RS422 ) options
  • Built-in real-time clock / real-time logging maintains a history of all events.
  • Serial Management Interface (USB) for local access.
  • Remote access over Telnet and SSH. Allows the user to access and carry out maintenance
  • User-Selectable IRIG-B Time Output: Local Time / UTC
  • Password Controlled Access. Maintains a complete log of all logins.
Input: NTP (RJ45)
Outputs: 4 x IRIG-B (BNC or RS-232 or RS-485 / RS-422)
Power Supply: 15V DC, 24V DC, 48V DC

NTP Input Specifications:

Number of NTP Input Ports 1
Interface Type 10/100BaseT
Interface RJ-45

Network Time Protocol:

  • NTP v4
  • Internet Protocol: IPv4, IPv6
  • Time Protocol: TIME (RFC 868)

IRIG-B Output Specifications:

Number of Output Ports 4
Interface Type Unmodulated, DCLS signal, No Carrier
Interface Option BNC (50 Ohms unbalanced) or
RS232 Twisted Pair or
RS422/RS485

Chassis Description

The NTP to IRIG-B converter is a substation hardened design available in a small form factor, compact DIN Rail / desktop chassis.

MTBF and Equipment MTBF:

  • Per MIL-HDBK-217F: ≥ 17 years @ 24C
  • Per Telcordia SSR 332, Issue 1: ≥ 26 years @ 24C

IRIG-B Timecode Supports:

IRIG B000 100pps, DCLS signal, no carrier, BCD (Time of Year), CF, SBS
IRIG B002 100pps, DCLS signal, no carrier, BCD (Time of Year)
IRIG B003 100pps, DCLS signal, no carrier BCD (Time of Year), SBS
IRIG B004 100pps, DCLS signal, no carrier CF, SBS, BCD (Time of Year), BCD (Year)

Power Supply Specifications:

Input DC voltage 48V DC (nominal)
Range of input voltage 15V to 60V DC Input
Voltage reversal protection Provided
Short circuit protection Provided

Power Consumption:

  • < 10W at ambient (steady state 24°C)

Power Supply Options:

  • AC power - 100V AC to 240V AC, 50/60 Hz
  • DC Power - 110V DC; 220V DC

Block Diagram

NTP to IRIG-B Converter - Diagram

IRIG-B Option* (any one type):

  • 50 Ohms (BNC)
  • RS422 / RS485
  • RS232 (Twisted Pair)

* IRIG-B option to be specified at the time of ordering.
Mechanical Drawing (PDF)