Specifications
Page 2 Copyright © 1997-1998 Detection Systems, Inc. MX775 Installation Guide
Surface or Corner Mounting
• Open 2 holes for surface or corner mounting.
• Mark the location for the mounting screws. Use the enclosure as a template. Pre-start
the mounting screws.
• Firmly mount the detector.
• Replace the circuit board/mirror unit.
Select the Vertical Angle
• The angle adjust markings are on the mirror. Slide the mirror forward or back until the
angle hash marks are in-line with the markers on each side of the frame.
This chart will help you set the correct Vertical Angle based on the mounting height,
mirror type, and desired range.
4.0 Wiring
CAUTION: Only apply power after all connections have been made and inspected.
• Connect wiring as shown.
Terminal Descriptions
• 1 (+), 2 (+), 3 (-) & 4 (-): Con- nect to the Multiplex Bus of the
control panel. Use no smaller than #22 AWG wire between the detector and the
control panel.
The program plugs are described as follows:
LED Operation
• ON: Allows the LED to operate when activated by alarm.
• OFF: The LED will not operate on alarm.
The LED is for Walk Test purposes only. Disable the LED
when Walk Testing is complete. To disable the LED, place the
jumper in the OFF position. To enable the LED (for future Walk
Testing), place the jumper in the ON position.
Sensitivity Mode
• Standard Sensitivity: Recommended setting for maximum false alarm immunity. Toler-
ates environment extremes on this setting. Not recommended
for Long Range or Barrier type patterns. The detector is shipped
in Standard Sensitivity mode.
• Intermediate Sensitivity:
Recommended setting for any lo-
cation where an intruder is expected to cover only a small por-
tion of the protected area. Tolerates normal environments on
this setting. This setting will improve your intruder catch per-
formance.
• High Sensitivity:
Fast response to intruder signals. For use in
quiet environments where thermal and illumination transients
are not anticipated.
5.0 Setup and Walktesting
• Apply power to the unit.
• Wait approximately 3 minutes (with no motion in the coverage area)
for the detector to setup.
• Walk test across the coverage pattern.
• The edge of the coverage is determined by activation of the LED.
• Walk test the unit from both directions to determine the bound-
aries.
6.0 Final Tests
• Connect a DC VOM to the Noise Voltage pins.
- Set meter scale for about 5.0 VDC (use of the TC6000 is rec-
ommended).
• The base reference level for reading background noise is approx-
imately 2.0 VDC.
- Installations in quiet environments will result in a steady read-
ing between 1.9 and 2.1 VDC.
- Voltage changes greater than 0.75 VDC from the reference level are desirable for
good catch performance.
- If changes are less than +0.75 VDC, the device may fail to respond if the temperature
between the intruder and the background is minimal.
• Turn on all heating and cooling sources that would normally be in operation during times
of protection.
- Stand away from the unit and outside the coverage pattern, then monitor the back-
ground noise for at least three minutes.
- Readings should not deviate from the reference level more than ±0.15 VDC.
- For readings outside these limits; eliminate the cause, re-point the unit slightly, or
mask off the affected zones.
7.0 Other Information
• Maintenance: Consult the DS7400Xi User's Guide (P/N: 32781B) for the procedure on
performing a zone test. Performing a zone test on a regular basis assures an alarm
output prior to arming the system.
• Sealing The Wire Entrance: The foam plug provided is used to seal the wire entrance
from drafts and insects after installation.
• Mirrors: The mirror is adjustable +2 to -18° vertically and +10 to -10° horizontally. To
change the mirror, just pull it out from its resting grooves.
Note: Excessive handling of the mirror surfaces may lead to performance degrada-
tion.
8.0 Coverage Patterns