Aeroqual SM50 Aeroqual Ozone Sensor Circuit

Power

Input: 11 - 32 VDC

Consumption: 1 - 3 W max

Outputs

0-5V analog: 12 bit

SPDT Relay: Onboard 24VDC / 1A, NO, NC, COM

2 x LED indicators: Relay status    Red = activated

                    Sensor status   Green = normal

                    Green slow flash (2 seconds) = warming up

                    Green fast flash (0.3 seconds) = failure

RS232: 2-wire proprietary protocol (not ASCII)

RS485: 2-wire proprietary protocol (not ASCII, not networkable)

Inputs

Relay set points: 4-way dip switch

Diagnostics

If sensor failure then:-

Status LED: Fast green flash

Relay: AA version (energised) LED red

       AB version (de-energised) LED off

       C10 version (de-energised) LED off

0-5V analog output: 5V

Mechanical

Board Size: 60 mm x 75 mm

Mounting: Screw or extrusion slot

Fan: On-board ball-bearing 50,000 hours

Sensor filter: On-board

Environmental

Operating temperature: 0ºC to 50ºC (-20ºC to 50ºC if enclosed)

Operating humidity: 5% to 95% RH (non-condensating)