Product Short Description
Product Name: Honeywell CP-EXPIO — ComfortPoint Open Expansion I/O Board
Product Introduction: The CP-EXPIO is an expansion I/O board for Honeywell ComfortPoint Open plant controllers. It expands point capacity — up to 15 modules per CP-IPC controller or 16 per CPO-PC-6A — bringing the maximum physical I/O count to 256 points (firmware 2.1+) or 128 points (firmware 2.1 and earlier). It features a powerful onboard processor for fast I/O scanning and flexible configuration via ComfortPoint Open Studio.
Description
Technical Specifications:
- Operating Voltage: 24 VAC ±20%, 50/60 Hz, 15 VA with “power” LED
- Power Consumption: Max 15 VA
- Housing Material: ABS Plastic
- Mounting: DIN-rail or wall mounting
- Protection Class: IP20
- Dimensions: 187.2 mm × 151.6 mm × 58.6 mm
- MTBF: 100,000 hours (approximately 11.4 years)
- Certifications: CE, UL 916, FCC Part 15 Subpart B Class B, UUKL Smoke Control
Integrated I/O (24 points total):
- Digital Outputs: 4 DOs (Triac output) with LED indication; Max 24 VAC; Max continuous current 500 mA; Min current 30 mA
- Digital Inputs: 6 potential-free contact inputs; LED indication when contact closed; can be used as Pulse Input @ 15 Hz for energy meter totalization
- Analog Outputs: 6 AOs, 0–10 VDC; 8-bit D/A resolution
- Analog Inputs: 8 universal inputs — 0/2–10 VDC, PT1000 (-50 to +150°C), NTC 20K (-50 to +150°C); 12-bit A/D resolution
Communication & Addressing:
- RS485 CP-IO bus connection
- Onboard HEX switch addressing: 1–15 (firmware 2.1 and earlier) or 0–15 (firmware 2.1+)
- All expansion boards connected on the same RS485 CP-IO bus
Environmental:
- Operating Temperature: 0°C to 50°C
- Storage Temperature: -20°C to +70°C
- Humidity: 5–93% RH, non-condensing
Functional Features:
- Onboard processor for fast I/O scanning
- Mixed input/output configuration for application flexibility
- Easy firmware upgrade via ComfortPoint Open Online
- LED indicators for power, run, and I/O status
- Up to 15 (CP-IPC) or 16 (CPO-PC-6A) modules per plant controller
Application Scenarios: Building automation and HVAC control — plant rooms, air handling systems, energy metering, heating/cooling control, smoke control (UUKL listed), commercial building management installations.
Installation Requirements:
- Mount on 35 mm DIN-rail or directly to wall inside a control panel
- Wire 24 VAC ±20% power supply
- Set unique HEX address via onboard switch — no duplicates on the same RS485 bus
- Daisy-chain RS485 CP-IO bus wiring to the plant controller and subsequent expansion boards
- Ensure proper panel ventilation; IP20 requires enclosed installation
Usage Precautions: Verify firmware version to determine maximum address range (0–15 vs 1–15) and max I/O count (256 vs 128). Ensure no duplicate addresses on the RS485 bus. Triac DOs require minimum 30 mA load — verify the connected load meets this requirement. Analog inputs must match the selected input type (voltage, PT1000, or NTC 20K). UL 916 and UUKL listings apply — confirm suitability for smoke control applications per local code.
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