I/O modules

Overview

The Honeywell CC-PUIO31 Universal Process I/O Module provides flexible multi-channel I/O for industrial automation and process control. Each channel can be configured for analog input, analog output, digital input, digital output, or pulse input. The module supports HART 7 communication, Sequence of Events (SOE) logging with 1 ms resolution, and advanced diagnostics for safe, reliable operation in harsh environments.

Key Features

• Multi-function channels: AI, AO, DI, DO, PI
• HART 7 support on AI and AO channels
• Sequence of Events (SOE) logging with 1 ms resolution
• Open Wire Detection (OWD) and electronic short-circuit protection
• Configurable fail-safe (FAILOPT) output behavior
• Extended operating temperature: -40°C to +70°C
• Certified for hazardous locations (Zone 2/Division 2)

Functional Specifications

Analog Input (AI)

• Channels: Up to 32
• Input Range: 0–20 mA or 4–20 mA
• Impedance: 250 Ω
• Accuracy: ±0.1% FS at 23.5°C, ±0.25% FS over -40°C to +70°C
• Scan Rate: 10 ms
• Short Circuit Limit: 25 mA

Analog Output (AO)

• Channels: Up to 32
• Output Range: 4–20 mA
• Accuracy: ±0.35% FS at 25°C (includes linearity)
• Resolution: 12-bit
• Response Time: 80 ms (HART), 0.25 ms (non-HART)
• Max Load: 825 Ω at 20 mA

Digital Input (DI)

• Channels: Up to 32
• Resolution: 1 ms (SOE)
• Open Detection: <2.0 mA
• Closed Detection: >3.2 mA
• Open Wire Detection: Configurable thresholds

Digital Output (DO)

• Channels: Up to 32
• Type: Solid-state source, short-circuit protected
• Load Current: 1 mA to 0.5 A (ON), <0.1 mA (OFF)
• Voltage: 24 V typical (ON)

Pulse Input (PI)

• Channels: 4 configurable
• Frequency: 0–15 kHz
• Minimum Pulse Width: 25 µs
• Duty Cycle: Configurable

Additional Features

• Energy limitation to protect hazardous locations
• Failover safe-state behavior configurable for AI and AO
• Short-circuit protection isolates affected channels without impacting others
• Redundancy options: Non-redundant CC-TUIO31 (9” IOTA), redundant CC-TUIO41 (12” IOTA)

Applications

• Industrial process control and automation
• Field transmitter integration with advanced diagnostics
• Hazardous location installations requiring reliable multi-channel I/O
• Systems requiring real-time Sequence of Events (SOE) monitoring

Details