B801RA

The Honeywell/System Sensor B801RA is a standard plug-in detector base from the 800 Series, designed for use with 2-wire conventional smoke (882) and heat (885) detectors in fire alarm systems.
It features remote annunciator output (+RA terminals) for external LED indicators and tamper-resistant mounting, compatible with 50/60mm junction boxes.
Key Specifications
Feature
Details
Compatibility
882 photoelectric smoke, 885 fixed heat detectors 
Dimensions
Diameter: 102mm (4.0"), Height: 14mm (0.6") 
Weight
36g (0.08 lb) ​
Mounting
50mm/60mm boxes, tamper-resistant option 
Electrical Ratings
8.5-35VDC, ≤90µA standby, ≤100mA alarm (panel-limited) ​
Operating Conditions
0°C-49°C (32°F-120°F), 10-93% RH non-condensing ​
Terminals
+IN/OUT, -IN/-OUT, +RA/-RA for remote annunciator ​