User manual

11
Connection Principle: The normally open detector shall be connected in parallel with
a 2.7K Ω resistor, while the normally closed detector shall be connected in series
with a 2.7K Ω resistor.
Mixed connection of normally open detectors and normally closed detectors
V.
V.
V.
V. System
System
System
System Installation
Installation
Installation
Installation
1.
1.
1.
1. Basic
Basic
Basic
Basic Requirements
Requirements
Requirements
Requirements of
of
of
of System
System
System
System Installation
Installation
Installation
Installation Design
Design
Design
Design
① During installation, suitable types and models of detectors should be adopted
according to user ’ s requirements for defense areas.
② The installation location, angle and height of detectors shall be determined
according to the effective defense zone of detectors and site conditions. The
detectors shall be installed in hidden locations as much as possible which must be in
compliance with defense requirements and installation specifications.
③ The wire shall be hidden from normal view as much as possible to prevent trace
wire from being damaged. Open wire shall be fed into a wire duct to prevent wire
Detector 1 Detector2 Detector 3
B
C 2.7k
Connection of several norm ally open detectors
Detector 1 Detector2 Detector 3
B
C 2.7k
Connection of several norm ally closed detectors