Encrypted Module Network
The Protege Inovonics receiver module incorporates encrypted RS-485 communications technology. Network
power is supplied by the N+ and N- terminals.
N
A
N
+
N
-
N
B
Network communications input
from the Controller or previous
module
Standard Communications Connection
Connection of the communications and network power should be performed according to the diagram shown.
It is important that the N+ network communications power be 12VDC supplied from an independent battery
backed power supply unit capable of supplying the required voltage to all devices on the RS-485 network.
The 12V N+ and N- communication input must be supplied from only
one
point. Connections from more than
one 12V supply may cause failure or damage to the unit or the device supplying network power.
End of Line (EOL) Resistors
The 330 ohm EOL (End of Line) resistor provided in the accessory bag
must
be inserted between the NA and NB
terminals of the
first
and
last
modules on the RS-485 network. These are the modules physically located at the
ends of the RS-485 network cabling.
330R
330R
First Module on RS-485 Network
Last Module on RS-485 Network
To
Next
Module
From
Previous
Module
NA
N+
N-
NB
NA
N+
N-
NB
PRT-IVO-IF | Protege Inovonics Wireless Receiver Module | Installation Manual
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