Rev.7a (for units from ser.no. 51053/built 2010) 26.01.2010 This document substitutes previous versions page 33 of 34
Zähl Elektronik-Tontechnik • Odenthaler Str. 47 • D-51465 Bergisch Gladbach • [email protected] • www.zaehl.com
Distributor (National/International):
sono Studiotechnik GmbH • Haagerstraße 5 • D-81671 München • Tel. +49 89 419671-0 •
•
www.sono.de
AIRCOM Manual
10.6.
Power Inputs
AIRCOM requires well regulated DC in a range of 12-24V. A maximum of 27V DC must not even be
exceeded by short voltage spikes.
A stable mains protective earth (PE) on a power supply input is mandatory.
The 0V pins of both power supply inputs are connected with each other inside the unit. The positive pins
of both power supply inputs are decoupled by diodes. I.e. both inputs may be operated at the same
time.
If both power supplies deliver the same voltage, load is shared. If they deliver different voltages, the
one with the higher voltage is loaded only.
Power consumption is typically 15…30W, but for short periods of time this value may be exceeded
substantially. The power supplies we deliver with AIRCOM have been selected to be capable for such
operation. Hence we assume that the units are operated with these power supplies. In case AIRCOM is
operated with other power supplies we do not guarantee for correct function of the units or any
damage. Furthermore warranty will be void.
10.7.
Control Outputs/GPI OUT
Important: Follow all warnings and hints given in chapter 3.3
Control outputs are designed as „open collector“ circuitry.
In the idle state they are high-impedance, but still connected to 5V by protective diodes. So never apply
voltages higher than 5V.
In the active state they interconnect to 0V. Do not exceed a maximum current of 80mA per output. A
maximum of 400mA is allowed for all outputs together.
You may supply relays and lamps directly from the 0V/5V pins of the REMOTE GPI/AUDIO connector.
Consider that the overall maximum current must not exceed 250mA. When loading the unit’s 5V pins
with 250mA, voltage will drop to approx. 4,3V.
Functional Diagram
10.8.
Control Inputs/GPI IN
Important: Follow all warnings and hints given in chapter 3.3
IR Mode only:
Input is designed as 5V logic circuitry. It is internally connected to 0V by a “pull-down”
resistor.
Connecting it to 5V (or >4V) will activate it.
Leaving it open or connecting it to a voltage in the 0…1V range will leave it deactivated.
Do not connect voltages which exceed the 0…5V range.
All other Control Inputs:
Inputs are designed as 5V logic circuitry. They are internally connected to
5V by a “pull-up” resistor.
Connecting them to 0V or a voltage in the 0…1V range will activate them.
Leaving an input open or connecting a voltage in the 4…5V range will leave it deactivated.
Do not connect voltages which exceed the 0…5V range.
