🖋The Honeywell 05701-A-0361 is the Engineering Card for the System 57 gas detection control system. It is always installed in the right-hand slot of the System 57 rack and provides the backplane serial communication controller and monitor, a time-and-date reference, and the RS-232 external engineering interface for the entire channel-card assembly. With front-panel tactile push buttons, an onboard real-time clock with calibration history, and an access-key security lock, it is the essential maintenance and setup station for every System 57 channel card.
🔶Key Specifications
- Manufacturer: Honeywell
- Model / Part Number: 05701-A-0361
- Product Family: System 57 Gas Detection Control System
- Product Type: Engineering Card (rack right-hand slot)
- Power Supply: 24 V DC (routed from the DC Input Card to the rack backplane)
- Power Consumption: Approx. 1.5 W
- Communication Interface: RS-232 external engineering interface; backplane serial controller/monitor
- Front Panel: Tactile push buttons for per-channel alarm level and performance checks
- Clock: Onboard real-time clock
- Security: Access key lock
- Expansion: Optional modules available for extended system options
- Origin: USA
🔶Key Features
- Backplane Communications Hub: Routes 24 V DC input to the rack backplane and hosts the serial communications controller and monitor for all channel cards.
- Full Maintenance and Setup Facility: The engineering card provides complete maintenance and setup capability for each channel card, including alarm level and performance checks via front-panel push buttons.
- Calibration Management: The onboard real-time clock maintains calibration history and provides calibration-overdue reminders.
- Secure Access: An access key protects configuration and maintenance functions from unauthorized changes.
- External Engineering Interface: RS-232 port allows connection to a PC or engineering terminal for system configuration and diagnostics.
- Standard Rack Position: Fixed right-hand slot mounting makes it a straightforward drop-in spare for existing System 57 racks.
🔶Typical Applications
- Gas detection and alarm control systems (combustible / toxic gas monitoring)
- System 57 channel-card setup, calibration, and maintenance
- Legacy gas-detection panels in oil & gas, chemical, and utility plants
- Spare-part supply for installed Honeywell System 57 installations








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