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PRT-PX16-PCB
Protege 16 PGM Output Expander
Installation Manual | June 2017
7.6
5V Isolated Power Indicator
The PGM Expander communicates using an isolated RS-485 interface for optimal performance and this requires
an isolated supply on the N+ and N- terminals. When a valid power supply is available the '5V ISO' indicator will
be ON for the interface. The '5V ISO' indication is located at the top of the network isolated interface.
7.7
Relay Ok
Power to the relays onboard is controlled by the F+ and F- terminals and can be overridden by the FIRE
OVERRIDE jumper. When power is supplied to the relays the 'RELAY OK' indicator will be ON.
7.8
Network RX/TX Indicator
The Network Receive and Transmit Data indicators are located on the top right side of the PCB beside the
network communication interface. The indicator shows when the Protege PGM Expander is transmitting and
receiving information from the module communications interface and is identified by the text 'RX' and 'TX'.
When the indicator is ON data is being transmitted or received.
