Specifications

112 Module 127: Protege DIN Rail Hardware Configuration | DIN Rail Hardware Setup
Encrypted Module Network
The Protege system incorporates encrypted RS-485 communications technology. Always connect the NA and
NB terminals of the controller to the NA and NB terminals of the expansion devices and keypads. The N+ and
N- must connect to a 12V power supply source capable of supplying the peak current drawn by all modules.
If a shielded cable is used, the shield must be connected at only one end of the cable. DO NOT connect a shield
at both ends.
PRT-PSU-DIN or
equivalent 12V DC
Shield is frame
grounded at
one point
Shields are
connected together
and Isolated
Shielded Cable
PRT-CTRL-DIN Network Module Network Module
Shielded Cable
Shield not
connected
NAN+ N- NB
NAN+ N- NB NAN+ N- NB
supply
Warning: 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 units supplying power. Make sure that the power
supply can supply enough current for the peak load drawn by all modules connected to the 12V supply,
including the Controller itself.
The recommended module network wiring specifications are:
 Belden 9842 or equivalent
 24AWG twisted pair with characteristic impedance of 120ohm
 Maximum total length of cable is max 900m (3000ft)
 CAT5e / CAT6 are also supported for data transmission when using ground in the same cable (to a
maximum length 100m / 328ft)
Unused wires in the cable must not be used to carry power to other devices.
The 330 Ohm EOL (End of Line) resistor provided 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
NAN+ N- NB NAN+ N- NB
First Module on RS-485 Network Last Module on RS-485 Network
To
Next
Module
From
Previous
Module