Videx GSM4K/4G - AUXILIARY OUTPUT AO2; AUXILIARY INPUT 2

66250754-4G-EN - V2.0 - 28/03/22
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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.32 below shows an example of connecting an Art.506N
relay to the AO2 output.
Art.4810/4G
Fig. 32
AUXILIARY INPUT 2
Auxiliary input 2 connects across terminals g & 4 on the GSM module. When this input is triggered it will send an SMS message to
the master telephone number, as shown in Fig.33, (to store a master number STM follow the SMS programming section on page
46 or the relevant steps in the GSMSK_66251720-EN_V2-1 software manual or later). 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.4810/4G
Normally Open (NO)
switched trigger
Fig. 33
IMPORTANT NOTE: AUXILIARY INPUT 2 HAS BEEN SPECIFICALLY SETUP FOR THIS FUNCTION ONLY AND DOES NOT
ACTIVATE AUXILIARY AO2. REFER TO NOTES AT THE TOP OF THIS PAGE FOR ACTIVATING AUXILIARY OUTPUT AO2.
Auxiliary Inputs/Outputs