Time Stamp Module - SOE - sequence of events recorder module

What is IRIG-B?

Communication, data handling and telemetry systems require time-of-day information for data correlation with time. IRIG-B is a serial time code format that allows electronic systems to accurately update their internal clocks every second.

It uses the analogy, at the tone the time will be 22 seconds past 10:03 AM on this 95th day of the year. This time code allows facilities at geographically separated locations to synchronize to a known time code source. IRIG-B encodes day of year, hour, minute, and second data on a 1 kHz carrier frequency, with an update rate of once per second.

Check your computer's clock against the U.S. Atomic Clock. This service is provided by (NIST) the National Institute of Standards and Technology. Readings from this clock contributes to world time, called Coordinated Universal Time (UTC). The time maintained by NIST should never differ by more than 0.0000001 seconds from UTC.


Time Stamp Module

High Speed Digital Event Logging

The 3000-TS sequence of events recorder module will time stamp 32 external event inputs with millisecond accuracy. The module connects to an RS-422 serial port for data retrieval. The 3000-TS module is compatible with any device that supports Modbus RTU Master or DF1 Half Duplex Master protocol. It is directly compatible with Allen-Bradley PLCs.

A PLC can now run data logging and control programs based on a precise time clock. This is essential to areas such as power utilities, process control, industrial automation, petrochemical and numerous other data logging applications. The time-stamped data collected by the 3000-TS module provides the ability to reconstruct sequence of events for system evaluation. Time stamped data can provide proof of correct system operation at the same time it logs and tags opening and closing contacts to millisecond accuracy.

The 3000-TS module receives its clock information from an IRIG-B source such as the IRIGB-205 clock generator or a commercial GPS satellite receiver. If the IRIG-B source is obtained from a GPS receiver, events at locations around the world can be stamped with the same coordinated time.

The IRIG-B signal is connected to the first 3000-TS module. If additional modules are required, the first module will relay the signal to additional 3000-TS modules in the system.

Distance between the first and last module in a system can be up to 2,000 feet. Up to a maximum of 15 modules can be networked together, providing 480 external event inputs from one IRIG-B input source.


Able to reconstruct sequence of events for system evaluation
Real time access of data for the Enterprise Information System
Time stamped data can provide proof of correct system operation
Can lead to reduced plant downtime


One millisecond time stamping on all inputs
Selectable contact debounce filtering from 0 to 40 milliseconds
1,000 deep event storage buffer
No special programming required
Configuration setup via dip switch and downloaded parameters


32 opto-isolated inputs (8 groups of 4)
Accepts a demodulated (TTL level) IRIG-B time signal
Optional modulated (AM) IRIG-B time signal
Up to 15 modules can be daisy-chained together


Talks via Modbus RTU slave or DF1 half duplex slave protocol
Uses a 4 wire RS-422 link between multiple modules
Information can be dispatched to HMIs or to a supervisory computer


The module is packaged in a 35mm DIN Rail mountable enclosure
Size: Height- 72mm (2.83"), Width- 200mm (7.87"), Depth- 118mm (4.65")
Weight: 0.75kg.(1.65 lbs.)