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Protégé System Controller Installation Manual
Figure 8 - External Status LED Connection
Encrypted Module Network
The Protégé System 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 should be performed according to the following diagram. It
is important that the 12V Communications power be supplied from the controller or
controlling device or from an independent battery backed power supply unit.
Figure 9 - Standard Communications Connection
Always connect the controllers NA and NB terminals to the NA and NB terminals of the
expansion devices and keypads as shown. The N+ and N- must go to a 12V power supply
source as shown in the following diagram.
Summary of Contents for PRT-CTRL
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