Bosch 8-Dec - Manual (Page 208)

200 | Detectors and Accessories | Motion Ceiling Mount
MX938i Multiplex Intru-
sion Detector
Features
▶ Interchangeable optical modules
▶ Selectable sensitivity
▶ Selectable signal gain
▶ Internal tamper switch
The MX938i is a ceiling-mount PIR intrusion detector that
provides a 360° coverage pattern consisting of 64 zones
grouped into 16 barriers, with one additional zone looking
straight down from the unit (sabotage). Through the use of
interchangeable optical modules, the detector can be
mounted on ceilings from 2.4 m (8 ft) to 5.5 m (18 ft) high.
It is designed to connect to the multiplex bus of a control
panel and optionally to an auxiliary 12 VDC power source.
It is compatible with DS7400Xi Series Control Panels with
a DS7430 or DS7436 Multiplex Expansion Module or with
GV2 and G Series Control Panels with a D8125MUX Module
installed.
Note The DS7400Xi Series Control Panels require
ROM version 1.07 or greater.
Functions
Interchangeable, Pointable Mirrors
The detector comes with two optical modules:
• AR8-13: For ceilings between 2.4 m (8 ft) and 4.0 m
(13 ft) high
•
AR13-18: For ceilings between 4.0 m (13 ft) and 5.5 m
(18 ft) high
Selectable Sensitivity
•
Standard: Recommended setting for maximum false
alarm immunity. Tolerates environment extremes on
this setting. Not recommended for Long Range or
Barrier type patterns. The detector is shipped in
Standard Sensitivity mode.
•
Intermediate: Recommended setting for any location
where an intruder is expected to cover only a small
portion of the protected area. Tolerates normal
environments on this setting. This setting will improve
your intruder catch performance.
• High: Fast response to intruder signals. For use in quiet
environments where thermal and illumination
transients are not anticipated.
Signal Gain
The MX938i permits selection of the signal gain depending
upon the environment to be protected. The gain select
jumper is located under the optical module.
•
High Gain: Recommended for large coverage
applications up to 18.3 m (60 ft) in diameter. The
MX938i is shipped in this setting. If the gain jumper is
missing, it will default to high gain.
• Low Gain: Recommended for applications where the
area to be covered is 12.2 m (40 ft) or less in diameter
and for applications where the HIGH signal gain setting
may be too sensitive for environmental extremes.
Note Setting the MX938i for the LOW signal gain
setting reduces the coverage area to 12.2 m
(40 ft) in diameter.
Internal Tamper Switch
The internal tamper switch sends a signal to the panel's
multiplex bus for display at the keypads when the detector's
cover is removed.
Certifications and Approvals
Region Certification
USA UL ANSR: Intrusion Detection Units (UL639)
China CCC MX938i: 2002031901000002
Europe X
Bosch Security Systems B.V. www.boschsecurity.com
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