Allied International Home Security System - Manual (Page 16)

Safety instructions
Hardware Installation Guide V2.0.0
16
MARLIN/OSCAR voltages
The inputs can be connected directly to +5 V. If a higher voltage is used, an
external resistor must be placed in series. Use @+12 V a 820
Ω and @+24 V
a 2.2 k
Ω resistor.
DOLPHIN voltages
The inputs can be connected directly to +5 V. If a higher voltage is used, an
external resistor must be placed in series. Use @+12 V a 470
Ω and @+24 V
a 1.2 k
Ω resistor.
Figure 1: Input block diagram (GUPPY)
Caution
a
GUPPY
The Guppy outputs are not short-circuit-proof.
If there occurs a short-circuit at the outputs, the output
driver will be damaged.
Caution
a
Voltages above +45 V may damage the optical coupler.
External resistor
(outside camera)
See warning above
Input signal
10 k
Input
Input state
Polarity
selectable
via software
= 5 V
> 5 V