Visonic Inc. DUO220EAM ユーザーズマニュアル

3.5 The Power-up Process

3.6 What Happens in Case of Masking?

After connecting the (+) and (–) terminals to the power source,

the DUO 220 starts a 60-second warm-up period, indicated by

alternate flashing of both LEDs.

If an attempt is made to stick masking material over the lens or

put a masking object close to the lens (DUO 220AM only), a

trouble alert will result about 60 seconds after masking:

Caution! If the alternate flashing of the LEDs does not stop within

60 seconds, a failure has been detected by the self-test circuitry

or, if you are dealing with DUO 220AM, the unit may be masked

(see Para. 3.6).

• The red and green LEDs will flash alternately;
• The TRB output will pull to ground and will remain grounded

until the detector is reset (see Para. 5.6 for procedure).

4. INDICATORS AND SELECTORS

4.2 Mode Selector

4.1 LED Indications

The DIP switch mode selector is mounted on the unit’s PC board

(see Fig. 3). It controls four functions as demonstrated in Fig. 6

and as detailed in Table 2.

The two LEDs (Fig. 1) are used to signal various alarm and

trouble messages as shown in Table 1 below:
Table 1. Interpreting the LED Indications

State of LEDs

GREEN RED Significance
Off Off

detection

Off

MW walk-test detection

Flashes

Off

PIR walk-test detection

Off

Alarm: MW + PIR detection

Flashes Flashes

Trouble (or masking) is being

detected by the self test circuitry, or
Initial warm-up routine (stops 60

seconds after power up).

Figure 6. DIP Switch Mode Selector

Table 2. Mode Selector Switch Functions

Switch State Function

Default

SW-1 OFF

One motion event trips the PIR
Two motion events trip the PIR

SW-2 OFF

Alarm walk test is disabled

Alarm walk test is enabled

SW-3 OFF

MW/PIR walk test is disabled
MW/PIR walk test is enabled

SW-4 OFF

Output relay opens upon alarm

and/or when trouble is detected.

OFF

Notes: 1. During walk testing, the first LED to respond is the

green one. It illuminates steadily (MW detection) or flashes (PIR

detection), depending on which one of the two detectors

discovered the motion first. Upon subsequent discovery of the

motion by the other detector, the green LED will go off and the

red LED will illuminate (alarm).
2. If the green and red LEDs continue to flash beyond the warm-

up period, a malfunction or masking has been diagnosed.

Replace the unit without delay.

*Setting SW-2 and SW-3 to OFF does not disable the trouble
indication (flash/flash).

5. Initial Adjustments

5. ADJUSTMENT AND TEST

5.1 Adjusting the Vertical Angle

For faster catch performance, shift SW-1 to OFF. In this position,
only one motion event is required to trip the PIR detector.

The vertical adjustment scale for the PIR detector is located at

the lower left edge of the PC board (see Figure 3). A screw in the

middle of the board allows fast and easy adjustment from +2° to

–12°. All DUO 220 units are pre-adjusted in the factory to –5°.

5.3 PIR Walk Test

A. Rotate the MW RANGE control all the way towards MIN.

Table 3 below provides recommended vertical adjustment angles

for various combinations of mounting height and coverage range.

B. Verify that DIP switch SW-3 is set to ON (the green walk-test

LED is enabled).

A. Use Table 3 to find the optimum angle for the coverage you

require. For example, if a coverage range of 9 m (30 ft) is

required and the detector is installed at a height of 1.8 m (6 ft)

above the floor, set the vertical angle to -6°.

C. Mount the front cover in place.
D. Walk into the detector's field of view at the expected far edge

of the coverage area. The green LED should flash for up to 5

seconds each time your motion is detected.

Table 3. Vertical Angle Adjustment

Note: If the green LED illuminates steadily, your motion has

been detected by the MW detector.

E. If PIR detection is not obtained at the far end of the coverage

area, remove the front cover and re-adjust the vertical angle.

Replace the cover and retest.

5.4 MW Walk Test

A. Remove the front cover.
B. Verify that the MW range control is set to MIN and DIP switch

SW-3 is set to ON (the green walk-test LED is enabled). Close

cover.

B. Loosen the vertical adjustment screw, slide the PC board

along the vertical slot until the pointer indicates the required

angle on the scale. Then tighten the adjustment screw firmly.

C. Start by moving into the coverage area at the far edge. The

green LED should light steadily for up to 5 seconds each time

your motion is detected.

Note:

Since the adjustment screw also fastens the PC board

to the base, vertical adjustment should be repeated if the PC

board is replaced.

D. If your motion was not detected at the far edge of the

coverage area, advance the MW RANGE control slightly

toward MAX and try again until your motion is detected

reliably at the far edge.

5.2 Setting the Motion Event Counter

If you wish to set the PIR detector for maximum false alarm
immunity, shift DIP switch 1 (SW-1) to ON. In this position, two
consecutive motion events are required to trip the PIR detector.

Caution! The MW detection range must not exceed the far

edge of the desired coverage area.

DE1823