
Troubleshooting
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Troubleshooting
This chapter addresses troubleshooting of the CARDIO system. Please note that even if CARDIO is
connected to products made by other manufacturers, we do not offer support for the non-SECANT
products. Therefore, always keep instructions and specifications of non-SECANT products for future
reference and contact their respective manufacturer for support.
Protection
Battery protection
To protect the central controller in case the battery be connected with reverse polarity, the device used is
a 3 Amp. POLYSWITCH*. This POLYSWITCH* will be in a high impedance state if the current powering
the system is higher than 3 Amp.
1. red wire: positive
2. black wire: négative
LED outputs (digital keys.)
To protect the driver of each LED, a POLYSWITCH* RT5 will limit the total current at the two outputs to
100mA. The POLYSWITCH* will be in a high impedance state if the current is higher than 100mA when
1. there is a short;
2. there are too many LED’s
External devices
To limit the total current used by all external devices such as touch panels, security detectors, siren, etc.
The protection is a 1.1 Amp. POLYSWITCH*. The POLYSWITCH* will be in a high impedance state when
the current is higher than 1.1 Amp. At this time the LED D14 located in the upper right corner of the board
will turn on.
1. there is a short in wiring;
2. the siren is defective;
3. the siren output is too high (30W max.);
4. the touch panel is defective.
Telephone protection
To protect the central controller from lightning’s and other high potential noises. POLYSWITCH* RT3 and
RT4 along with SIDACTOR* SD1 will limit the energy to 300V.
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