OT142
The ORENA OT142 is a 4-wire conventional photoelectric smoke detector with relay output for security and fire alarm systems, operating on 9-28VDC with unpolarized input and adjustable NO/NC relay contacts for flexible integration.
It features twin LEDs providing 360° visibility, built-in microprocessor with intelligent software for drift compensation and false alarm rejection, insect-resistant chamber, and tamper lock base, with reset via momentary power interruption.
| Specification | Details |
|---|---|
| Part Number | OT142 |
| Type | 4-wire photoelectric w/ relay output |
| Operating Voltage | 9-28VDC |
| Quiescent Current | 200 µA |
| Alarm Current | 45 mA @12VDC |
| Relay Rating | 2A @24VDC |
| Sensitivity | 1.06±0.26%FT obscuration |
| Dimensions | 103 × 103 × 55 mm (w/base) |
| Weight | 155 g |
| Temperature Range | -10°C to +50°C |
| Humidity | 10-93% RH (non-condensing) |
| Standards | EN54-7 compatible |
