14
PRT-CTRL-SE
Protege SE Integrated System Controller
Installation Manual | June 2017
4.9
Encrypted Module Network
The Controller incorporates technically advanced encrypted RS-485 communications technology. The isolated
communications interface offers full galvanic isolation to prevent ground loop noise and cross phase ground
differential. The communication offers superior interference immunity. Connection of the communications shall
be performed according to the following diagram.
NA
N+
N-
NB
Network communicaons input
from the Protege Integrated
System Controller or previous
Protege module
Standard Communication Connection
Always connect the Controller's NA and NB terminals to the NA and NB terminals of the expansion devices and
keypads. The N+ and N- must go to a 12V power supply source as shown below.
NA
N+
N-
NB
NA
N+
N-
NB
NA
N+
N-
NB
+AUX-
Z1 COM
COM
Z2
Z3
Z4
Protege Integrated System
Controller or module supplying
power to networked devices
AUX power from Module or
external power supply
Next modules
on network
Network Power Connection
The above diagram shows a power connection taken from the auxiliary power outputs on the Controller's zone
terminals.
This connection is suitable for smaller systems provided that the:
Maximum total output current,
AUX DC output current,
B1/B2 DC output current, and
Total combined current
are ALL lower or equal to the values outlined in the Technical Specifications section. If these currents are
exceeded, a separate power supply shall be used.