The Honeywell 8C-PDIPA1 is a high-precision, 24 VDC Digital Input Pulse Accumulation module designed for Series 8 C300 controllers. It features 32 input channels, where the first 16 channels are configurable for either standard digital inputs or pulse accumulation—ideal for frequency measurement up to 1 kHz (min 30% duty cycle). Built with galvanic isolation, system-level diagnostics, and a conformal coating, it's engineered for high reliability in harsh industrial environments. Modules are hot-swappable and support redundant communication paths, ensuring minimal downtime.

Key Specifications

• Model / P/N: 8C‑PDIPA1 (Honeywell 51454471‑375), coated IOTA module for Experion C300/Series 8 

• Channel Count: 32 digital inputs; first 16 can be configured for pulse accumulation or DI; channels 17–32 for DI only 

• Input Voltage: 24 VDC (18–30 VDC range) 

• Pulse Accumulation: Supports 0–1 kHz pulses, ≥30% duty cycle; min pulse width 300 µs; individual channel scan 300 µs 

• Scan Latency: 300 µs for pulse channels; ~5 ms input filter delay 

• Input Impedance: ~4.2 kΩ; ON sense ≥13 V, OFF ≤ 5 V 

• Isolation: 1000 VAC RMS (±1500 VDC) galvanic optical isolation 

• Module Current: ~105 mA @24 VDC 

• Diagnostics: Extensive built-in self-tests, hot‑swap under power, redundancy support 

• Operating Temperature: 0–60 °C; Storage –40 to +85 °C 

• Coating & Ruggedization: G3 conformal coating for harsh environments 

• Certifications: Class I Div 2 / Zone 2 Ex‑nA IIC T4 

• Physical Specs: Approx. 12.7 × 12.7 × 3.2 cm; weight ~0.2–0.7 kg