Foxboro N‑2AX+DIO Combined Alarm And Discrete I/O Module

Technical Specifications Module Type: Combined Alarm‑Processing plus Discrete I/O Module Signal Type: Dry‑contact alarm trigger input, discrete status input, relay‑contact alarm output Operating Power: 24 VDC Operating Temperature: 0 °C to +60 °C Storage Temperature: −40 °C to +85 °C Relative Humidity: 5%‑95%, non‑condensing Mounting: Standard rack‑slot plug‑in installation Certifications: CE industrial alarm‑I/O hybrid‑module compliance

Functional Features Multi‑channel alarm‑signal receiving and alarm‑logic‑latch processing function. Integrated discrete‑input signal acquisition and discrete‑output relay‑contact driving function. Local LED status‑indication for alarm‑event and discrete‑channel‑status display. Relay‑contact output drives external cabinet‑local alarm‑annunciator equipment. Uploads alarm‑event and discrete‑status data to DCS host‑system via internal bus.

Application Scenarios Installed inside DCS control cabinets of petrochemical and chemical industries. Used for cabinet‑local alarm‑annunciator subsystem, completes alarm‑trigger‑signal processing and auxiliary discrete‑signal interaction for on‑site equipment status‑monitoring.

Performance Parameters Alarm‑latch state can keep stable under short‑term power‑supply fluctuation. Relay‑contact load capacity meets driving‑requirement of ordinary external alarm‑annunciator devices. Discrete‑signal‑acquisition response speed matches cabinet‑local auxiliary‑signal‑monitoring timing requirement.

Structural Characteristics Standard rack‑plug‑in modular housing. Gold‑plated back‑plane connector for internal‑system‑bus and power‑supply interconnection. Front‑panel LED indicators for alarm‑status and discrete‑channel‑status display. Screw‑type terminal‑block for external alarm‑signal and discrete‑signal wiring.

Installation Requirements Insert N‑2AX+DIO module into designated slot of standard I/A series rack and lock mechanical buckle. Complete external alarm‑signal and discrete‑signal wiring on front‑panel screw‑type terminals according to official wiring drawing. Carry‑out alarm‑function and discrete‑channel test after system power‑on.

Usage Notes Do not exceed rated‑contact‑load specification for external‑alarm‑loop relay‑output terminals. Cut off rack‑power‑supply before module disassembly‑maintenance operation. Periodically check alarm‑indication status during long‑term‑system‑operation process.