Remote devices hardware connections – ATEIS ECS User Manual
Page 54
ECS MANUAL
Version EN.1
54
Remote Devices Hardware Connections
Because of the bus 485 and the audio, the connection of several PPM is not easy. You normally have
to create a bus with the RS485 (data and power) by using junction box (daisy-chain).
All audio from PPM must be sent to the LAP. Each Junction box has an audio output which is the
microphone signal of the PPM connected to the junction box.
Connect audio output from each junction box to an audio input of the ECS.
Each Junction box has also an audio input, used to get the audio from the ECS and sent it to the PPM
speaker.
Only for the first PPM/JB : The audio of the first PPM is already on the RJ45 linked to the ECS, so you
can either use the audio coming from the RJ45 or the audio coming from the JB audio output.
In summary:
•
485 :
daisy chain, datas and power go from the ECS to the first JB (or PPM) then from
the first JB (PPM) to the second, etc.
•
Audio:
"star" connection, Each microphone and/or speaker is connected to an input and/or
output of the ECS
For other type of connection (Star connection, each PPM are directly connected to the ECS) we
cannot ensure a proper working.
Note: it is advised to not put more than 8 PPMs and or URCs on one ECS. It is working with up to
16 PPM but the response time is increased and you will have to use external power supply.