Figure 4: Alphavision Ip (+ Gprs) Circuit Board Layout - alphatronics PSTN-2-IP Installation Manual

RS-485 Bus
12VDC
power adapter
The AlphaCom PSTN-2-IP, AlphaCom PSTN-2-IP GPRS and AlphaVision IP + GPRS transceiver can be
powered in two ways: with the RJ10 connection (net adapter art. code 200079) or directly on the + and 0V
terminals of the RS-485 bus connection.
Attention: when the IP (+ GPRS) transceiver is connected to the RS-485 bus, a choice must be made for the
following:

Either the IP (+ GPRS) transceiver is powered through the RS-485 bus. This is the most common
situation.

Or the IP (+ GPRS) transceiver is powered by an external power supply through the RJ10
connection. This is not common when also connecting to the RS-485 bus. If this is however the
case then only the A, B and 0V wires of the RS-485 bus must be connected !.
The analog dialer of the control panel is connected to the alarm dialler RJ-11 input (marked with CMK).
Only the two middle wires (2 and 3) are used.
Service manual AlphaCom PSTN-2-IP (GPRS) transceiver
Figure 4: AlphaVision IP (+ GPRS) transceiver circuit board layout
Rev. 2.2 10-07-2014
LAN
connection
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