Foxboro 870ITEC‑AYFNZ Smart Temperature Transmitter

Technical Specifications

Model:870ITEC‑AYFNZ

Brand:Foxboro

Series:870IT smart transmitter series

Function:Field‑mount temperature signal conditioning and conversion

Sensor input:Multi‑type configurable,platinum RTD,Ni‑Cu RTD,multiple thermocouple types(J,K,T,E,N,R,S,B)

Output signal:4‑20mA two‑wire current loop,superimposed HART 7.0 digital communication

Power supply:12‑42VDC loop‑powered,nominal 24VDC

Accuracy:±0.1% full‑span at reference temperature 23℃

Temperature drift:max ±0.02% span per ℃ temperature change

Response time:＜100ms,software adjustable damping parameter

Diagnostic function:Sensor open‑circuit,short‑circuit fault detection,output saturation alarm(3.8mA / 22.8mA)

Configuration:Parameter setup via HART handheld communicator

Mounting:Field‑mount head‑mount installation for sensor housing

Environmental standard:Compliant with ISA‑S71.04 Class G3 industrial atmospheric condition

Housing:Die‑cast aluminum explosion‑proof housing,corrosion‑resistant surface coating

Protection class:IP66 / NEMA 4X

Operating temperature:‑40℃ ~ +85℃

Storage temperature:‑40℃ ~ +85℃

Relative humidity:5%‑95% non‑condensing

Anti‑vibration:5g vibration resistance,30g shock resistance

Weight:0.92kg

Dimensions:112mm × 130mm × 62mm

Certification:CE,UL,ATEX hazardous area certification

MTBF:>95000 hours

Built‑in function

870ITEC‑AYFNZ smart temperature transmitter collects resistance or millivolt signal from field‑installed RTD and thermocouple sensors,converts temperature value to standard 4‑20mA analog signal meanwhile supports HART digital communication for remote parameter configuration. Built‑in sensor fault diagnosis outputs fixed alarm current when sensor circuit fails,provides early warning for DCS control system. Die‑cast aluminum housing adapts to harsh outdoor and hazardous‑area site conditions,widely applied for temperature measurement loops of chemical,petrochemical and power‑plant facilities.

Product Brief

870ITEC‑AYFNZ belongs to Foxboro 870IT legacy field instrument spare‑part family,obsolete original automation component. It adopts two‑wire loop‑power mode,needs matching field temperature sensor and HART communicator for commissioning. Widely used for original Foxboro process‑control equipment maintenance and renovation. ESD anti‑static protection shall be followed during installation