NI cFP-CTR-500 8-Channel Counter Input Module

The NI cFP-CTR-500 is an 8-channel counter input module for Compact FieldPoint systems, delivering event counting, frequency measurement, period measurement, pulse width measurement, and quadrature encoding in industrial and laboratory environments. It accepts 10 to 30 VDC sinking inputs at speeds up to 50 kHz, with 16-bit counter resolution and optional internal cascading up to 128 bits. The module integrates 4 configurable gate inputs, 4 sourcing output channels, and software-selectable lowpass filtering at 50 kHz or 200 Hz. Onboard diagnostics and LED status indicators support field installation and troubleshooting.

– Technical Specifications

• Counter Channels: 8 inputs, 16-bit resolution, cascadable to 128 bits
• Input Specifications: 10 to 30 VDC sinking, maximum 50 kHz
• Counter Modes: Event counting, period measurement, pulse width measurement, quadrature encoding
• Gate & Output Channels: 4 configurable gate inputs; 4 sourcing output channels
• Filtering: Software-enabled 50 kHz or 200 Hz lowpass filter
• Terminal Count: Configurable rollover/reset with output triggering
• Isolation: 2,300 Vrms optical bank isolation; 250 Vrms CAT II channel-to-ground; no channel-to-channel isolation
• Power Consumption: 800 mW from network module
• Output Requirements: 10–30 VDC external supply, up to 1 A per channel; 1 A fast-acting fuse per VOUT terminal; 2 A fast-acting fuse per V and VSUP terminal

– Key Features

• Input leakage tolerance: <0.2 mA OFF-state current from sourcing devices
• Hot-swappable module design
• Channel status indicated by On/Off LEDs
• Safety certified: IEC 61010-1, EN-61010-1, UL 61010-1, CSA 61010-1

– Typical Applications

Sensor interfacing, industrial pulse counting, frequency monitoring, motion control feedback, and event-triggered data logging where sinking input devices and variable frequency measurements are required.

– Compatibility & Integration

Mounts directly on Compact FieldPoint backplanes (cFP-BP-x or cFP-180x). No additional interface hardware required.