Description
Honeywell 05704-A-0145 Quad Channel Control Card
The Honeywell 05704-A-0145 is a high-density processing module from the System 57 family, specifically designed for industrial gas detection and monitoring. It provides centralized control and alarm management for up to four independent gas detectors within a single card slot.
Product Introduction
The 05704-A-0145 serves as a core component in the System 57 rack architecture. It interfaces with 4-20mA loop sensors to provide continuous monitoring of flammable, toxic, or oxygen gas levels. Each card is microprocessor-controlled and features a dedicated front-panel display to show real-time concentrations and system status for all four channels.
- 05704-A-0145
Product Parameters (Datasheet)
| Parameter | Specification |
| Model Number | 05704-A-0145 |
| Input Signal | 4–20 mA (Linear, 0 to 25mA range) |
| Number of Channels | 4 Independent Channels |
| Operating Voltage | 18V to 32V DC |
| Typical Power Consumption | 7.5W |
| Max Power Consumption | 8.3W |
| Measurement Accuracy | ±1% Initial Accuracy |
| Loop Resistance | Max 500 Ω (including sensor) |
| Operating Temperature | -5°C to +55°C |
| Dimensions (H x W x D) | 132 mm x 25 mm x 172 mm |
| Weight | Approx. 170g |
Country of Origin
- Origin: United Kingdom (UK) / USA (depending on manufacturing batch)
Application Areas
- Oil and Gas: Monitoring offshore rigs and refineries for combustible leaks.
- Chemical Processing: Detection of toxic gases and oxygen depletion in plants.
- Water Treatment: Ensuring safety in areas using chlorine or ozone.
- Manufacturing: General industrial safety monitoring in workshops and warehouses.
Product Technical Description
- Four-Channel Efficiency: Consolidates four monitoring loops into a 1-inch wide card format, maximizing rack space.
- Visual Monitoring: Features a backlit LCD that can cycle through channel readings or display the highest reading automatically.
- Comprehensive Alarms: Supports three levels of alarms (A1, A2, A3) per channel, plus STEL and LTEL exposure limit monitoring.
- Fail-Safe Design: Includes “Fault” and “Inhibit” indicators for each channel to ensure system integrity and prevent false triggers during maintenance.
Instructions for Use
- Installation: Insert the card into the System 57 rack. Ensure the 32-way connector (SK2) is properly seated in the backplane.
- Wiring: Connect the field gas detectors to the rear terminals. The module supports both loop-powered and separately powered sensors.
- Configuration: Use the System 57 Engineering Card or a PC interface to define gas types, full-scale ranges, and alarm thresholds.
- Testing: Perform a “Lamp Test” and “Alarm Test” via the front panel push-buttons to verify LED and relay functionality.
- Reset: Use the front-panel button or remote reset input to clear latched alarms once gas levels return to a safe state.
Recommended Similar Models
- Honeywell 05704-A-0144 (Catalytic Bridge Input version)
- Honeywell 05701-A-0301 (Single Channel Control Card)
- Honeywell 05704-A-0121 (Quad Relay Interface Card)
- Honeywell 05701-A-0361 (System 57 Engineering Card)
- Honeywell 04200-A-0146 (Current Source Analog Output Module)
Product Manual & Documentation
To access the full technical manual and detailed wiring diagrams, please visit the documentation portal:
Download Honeywell 05704-A-0145 Manual/Datasheet
