®
SPL-TO
OPTICAL TAMPER DETECTOR
spl-to_en 03/17
The SPL-TO is a device intended to detect an attempted covering the piezoelectric
transducer in sirens with mounting foam. It is designed for use together with the following
sirens of SATEL's manufacture (SPL type):
SPL-2030, SPL-5010, SPL-5020.
Operation of the SPL-TO is based on the infrared barrier principle. The optical system
consists of the transmitting part and the receiving part. The transmitting diode sends a beam
of IR radiation in pulse mode to the receiving diode. If there is an obstacle on the path of IR
beam, the detector opens the relay contacts and lights up the TAMPER LED. The detector
can be used for making an independent tamper circuit.
1. Description of the Detector
Figure 1
TAMPER
TMP TMP
COM 12V
1
Explanations for Figure 1:
1
- TAMPER LED (red). The LED is ON if there is no communication between the
transmitting and receiving LEDs. The LED lights up approx. 2 seconds after the infrared
beam was interrupted, and goes out immediately after removal of the obstacle.
2
- mounting holes.
3
- relay.
Description of terminals:
TMP
- tamper contact terminals.
12V
- power supply input.
COM
- common ground.
2. Installation of the Detector
Caution: Before starting hook-up of the optical tamper detector to the already existing
system, it is recommended that the whole system be deenergized.
1. Screw down the SPL-TO board to the siren housing base (from outside).
2. Connect power supply cables to the terminals COM and 12V.
3. Cut the TMP terminals in the tamper circuit of alarm control panel. It is also possible to
connect the tamper circuits of the SPL-TO and the siren.
3
2
2
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