Foxboro 685-069171-100 - High-Speed Counter Input Module for I/A Series DCS

Foxboro 685-069171-100 – High-Speed Counter Input Module for I/A Series DCS

In stock

Product Introduction:
The Foxboro 685-069171-100 is a high-speed counter input module for the I/A Series distributed control system. The “685” identifies the counter module family, “069171” specifies the 4-channel high-speed counter configuration, and “100” is the hardware revision. This module accepts high-frequency pulse signals from encoders, turbine flow meters, and other pulse-generating devices. Unlike standard digital input modules that are limited to a few hundred pulses per second, this module can count pulses at rates exceeding 100 kHz, making it suitable for precision measurement applications. The module provides 32-bit counter values to the I/A Series processor for totalization, rate calculation, and batch counting.

Technical Specifications:
Board Type: High-Speed Counter Input Module
System: Foxboro I/A Series DCS
Channels: 4 independent high-speed counter channels
Maximum Frequency: 100 kHz per channel (100,000 pulses per second)
Counter Resolution: 32-bit (4,294,967,295 counts)
Input Types: TTL, HTL, differential, single-ended (configurable per channel)
Input Voltage: 5V TTL, 12V HTL, 24V DC (configurable)
Debounce Time: 0 to 100 milliseconds (configurable per channel)
Totalizer: 32-bit rolling totalizer with automatic overflow handling
Rate Calculation: Configurable pulse rate calculation (pulses per minute, per second, etc.)
Communication: I/A Series UIM/LIM backplane
Power: 5V DC from backplane
Form Factor: Eurocard (3U height)
Operating Temperature: 0 to 60 degrees Celsius

Functional Features:
100 kHz Counting: Handles high-frequency signals from turbine meters and high-speed encoders without missing pulses.
32-Bit Resolution: Provides over 4 billion counts before rollover, suitable for long-term totalization.
Per-Channel Configuration: Each channel independently configurable for input type, debounce, and counting mode.
Rate and Total: Simultaneously provides pulse rate (frequency) and accumulated total for each channel.
Batch Counting: Supports preset batch counting with alarm output when the batch count is reached.
Quadrature Decoding: Supports A/B quadrature encoder inputs for direction-sensitive counting.
Diagnostic LEDs: Per-channel LEDs show pulse activity and counter status.