Encrypted Module Network
For devices using hardware revision 010, you can only use COM2 and COM3 to create module network spurs
when the network repeater is connected via ethernet. In this scenario, COM1 is only used for supplying power to
the network repeater.
The network repeater incorporates encrypted RS-485 communications technology. The isolated communications
interface offers full galvanic isolation to prevent ground loop noise and cross-phase ground differential between
network devices on the three RS-485 ports.
Standard Communication Connection:
N
A
N
+
N
-
N
B
Network communications input
from the Controller or previous
module
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.
Always connect the NA and NB terminals of the network repeater to the NA and NB terminals of the
communication network. The N+ and N- must go to a 12V power supply source as shown in the following diagram,
and connected at
one
+12V power source only.
Network Power Supplied By Network Module:
N
A
N
+
N
-
N
B
N
A
N
+
N
-
N
B
Next module
on network
Controller or module supplying
power to networked devices
AUX power from module or
external power supply
N
A
N
+
N
-
N
B
+ AUX -
Z1 COM
COM
Z2
Z3
Z4
PRT-MNR2-DIN | Protege Module Network Repeater | Installation Manual
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