66250754-EN - V1.0 - 18/02/19
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4000 Series GSM Audio Intercom - Technical Manual
4000 Series GSM Audio Intercom with Proximity
AUXILIARY OUTPUT AO2
The auxiliary output AO2 is an open collector output (switched low, 150mA max.) and can be used to switch a negative trigger onto
a transistor switched device, for example an Art.506N, for the programmed A2T time (refer to notes on page 44 setting the A2T
time). This can be particularly useful when switching an additional device for instance a secondary gate control.
The AO2 output can only be triggered in two ways:
1. During a call: press 5 on the telephone keypad to activate AO2 for the programmed A2T time.
2. At anytime (depending on the operation required) send one of the following SMS messages to the GSM intercom: 1111A2O?
to trigger the AO2 output for the programmed A2T time. 1111A2L? to latch the AO2 output. 1111A2U? to unlatch the AO2
output.
For this feature an additional transistor switched device will be required. Fig.36 below shows an example of connecting an Art.506N
relay to the AO2 output.
Art.4810
To Antenna
Fig. 36
AUXILIARY INPUT 2
Auxiliary input 2 connects across terminals g & 4 on the GSM PRO module. When this input is triggered it will send an SMS message
to the master telephone number, as shown in Fig.37, (to store a master number STM follow the SMS programming section on page
46 or the relevant steps in the GSMSK_66251720_EN_V2-0 software manual). Once this input is triggered it cannot be triggered
again for 4 minutes, this is to avoid multiple SMS messages being sent for the same alarm.
Art.4810
To Antenna
Fig. 37
IMPORTANT NOTE: auxiliary input 2 has been specically setup for this function and does not activate auxiliary output AO2.
Refer to the notes at the top of this page for activating auxiliary output AO2.
Auxiliary Inputs/Outputs
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