®
AQUA RING S
CEILING MOUNT
DIGITAL PASSIVE INFRARED DETECTOR
aquaring_s_
en 07/11
The microprocessor-based, fully digital AQUA RING S detector for ceiling mount
installation is characterized by high sensitivity and interference resistance. A dual
pyroelectric sensor is used in the detector. The detector can be supplied with AC or
DC 24 V voltage.
The detector is provided with a
prealarm feature
. Prealarm is signaled by a short
flash of the LED after changes which do not meet the alarm criteria have been
detected within the coverage area. The prealarm sensitivity depends on what
sensitivity is set on the detector pins. Frequently occurring prealarms may cause an
alarm.
The detector requires to warm up for the first 30 seconds after applying power. Warm-
up is indicated by a rapid LED blinking.
Fig.1. View of detector electronics board.
Explanations to Fig. 1:
1 – terminals:
NC
–
relay
(NC)
TMP
– tamper contact
