Solar panel extends access control battery life
An
EMX Industries product story
Edited by the Engineeringtalk editorial team
Mar 23, 2006
Solar panel extends battery life on access control product from 150 days to two years.
EMX Industries, a manufacturer of sensors for automation and gate and door control, has become the first manufacturer of photoeye access control products to offer a solar panel power option for its emitters.
EMX is introducing the SP44 Solar Panel for its P-44 through-beam photoelectric sensor and transmitter, thereby extending emitter battery life by up to two years.
The P-44's emitter is powered by a 9V alkaline battery, which will normally last at least 150 days.
By extending the life of this battery up to two years, field service replacements are reduced by a factor of five.
With dimensions of 6.9 by 3.0 by 0.71cm, the solar panel can be located almost anywhere that is exposed to sunlight.
A 6.1m two-conductor cable connects the SP-44 to the P44 power input terminals.
When the panel is installed to receive maximum sunlight, it keeps a 9V DC floating charge on the P44's alkaline battery during daylight hours.
Essentially, the P44 emitter and its circuitry are powered by the solar panel during the day and by the battery at night.
A green LED on the P44 emitter indicates the power-on condition.
With proper power applied, the detection distance between the P44 emitter and its receiver can be up to 15m.
Whenever the photoelectric beam between the emitter and receiver is blocked, the receiver activates a relay that can be used for applications such as garage door reversal, electrical mechanism shutdown and other safety functions.
The receiver is immune to incidental light up to an intensity of 5000 lux.
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