Triconex 3515 32-Point Pulse Totalizer Input TMR Module

Product Description

The 3515 is a high-precision Pulse Totalizer Input (PTI) module engineered for the Triconex Triple Modular Redundant (TMR) controller platform. It features 32 independent, opto-isolated channels designed to interface with active-flow or per-unit sensors. This module is essential for applications requiring accurate count accumulation and rate measurement without the risk of data loss.

Technical Specifications

• Input Signals: 32 non-commoned, opto-isolated points
  
• Counter Resolution: 31-bit independent counters
  
• Maximum Count: 2,147,483,647 (Overflow indicated by negative integer)
  
• Frequency Range: 0 Hz to 1 KHz
  
• Minimum Pulse Width: 300 microseconds
  
• Input Voltage: 42.5 VDC absolute maximum
  
• Switching Threshold: 15 VDC (Typical Off-to-On) / 8 VDC (Typical On-to-Off)
  
• Accuracy: ±2 counts (Active module)
  
• Isolation: 1,500 VDC minimum (Opto-isolated)
  
• Power Consumption: < 10 Watts (Logic power)
  
• Color Identification: Purple Code
  

Common FAQ

How does the 3515 handle counter overflows?

Upon reaching its maximum 31-bit limit ($2^{31}-1$), the counter transitions to a negative integer value. This allows the control program to detect the wrap-around and reset the counter as needed.

Can the module be replaced while the system is running?

Yes, the 3515 supports full hot-swap functionality. When used with a hot-spare module, the system ensures zero counts are lost during the transition between the primary and spare units.