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セキュリティセンサー EDI 222 SeriesのPDF 操作マニュアルをオンラインで閲覧またはダウンロードできます。EDI 222 Series 17 ページ。 Inductive loop detector sensor unit

1.8 SPECIFICATIONS

Power Supply:

24 VDC, 80mA maximum, 40mA quiescent.

Loop Input:

The loop inputs incorporate transient protection devices and the loop oscillator circuitry is

transformer isolated. The transient protection will withstand the discharge of a 10uF capacitor

charged to 2,000V across the loop inputs or between any loop input and earth ground. The

transformer isolation allows operation with loops which may be grounded at a single point.

Tuning:

Each channel of the Model 222 will automatically tune to any loop and lead-in combination

within the 20 to 2000 microhenry tuning range (Q factor greater than 5) upon application of

power or when a valid reset signal is received. A channel may be retuned by adjusting mode,

sensitivity or frequency.

Lead-in Length:

The unit will operate with lead-in (feeder) lengths over 1,000 feet with appropriate loops and

proper lead-in cable.

Environmental Tracking:

The Model 222 automatically and continuously compensates drift and environmental effects

throughout the tuning range and across the entire temperature range.

Grounded Loop Operation:

The Model 222 will operate when connected to poor quality loops including those that have a

short to ground at a single point.

Sequential Scanning:

Only one channel is energized at any given time, thus reducing the possibility of crosstalk

between adjacent loops connected to the same unit.

Fault Monitoring :

The Model 222 Loop Monitor continuously checks the integrity of the loop. The system is able

to detect shorted or open circuit loops, or sudden changes in inductance exceeding 25% of the

nominal value. If a fault is detected on a channel, the DET and FLT indicators will flash. The

channel output will remain in the detect (call) state.

i. One flash indicates an open circuit or a loop inductance exceeding the upper limit of the

tuning range.

ii. Two flashes indicate a short circuit or a loop inductance exceeding the lower limit of the

tuning range.

iii. Three flashes indicate that a sudden change in inductance exceeding 25% ∆L/L has

occurred.

If the fault condition is removed, the DET indicator and the channel output will return to normal

operation. The FLT indicator will continue to flash indicating that a fault had previously

occurred.

High Intensity LED Indicators:

Eberle Design Inc.

Model 222

Operations Manual

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