Communication Interface
RDP-110C annunciation commands are received from the DGC over an RS-485 serial communication bus.
Received communication inputs are converted to signals suitable for use by the RDP-110C.
Pushbuttons
Two front panel pushbuttons accept local inputs: Lamp Test and Alarm Silence.
LED and horn operation can be verified by pressing the Lamp Test pushbutton.
An audible alarm is reset by pressing the Alarm Silence pushbutton. Once reset, the horn is reactivated only by
the occurrence of another separate pre-alarm or alarm condition.
Microprocessor
The microprocessor executes embedded firmware which interprets commands received from the DGC and
annunciates pre-alarm and alarm conditions by lighting the appropriate indicators and sounding the horn.
Firmware
Embedded firmware controls power-up initialization, annunciation element setup, and serial communication.
When control power is applied to the RDP-110C, the firmware initiates a power-up sequence, checks the onboard
memory, activates all annunciation functions, and begins monitoring for inputs from the DGC.
CONTROLS AND INDICATORS
RDP-110C controls and indicators consist of pushbuttons, LEDs, and an audible alarm (horn). These front panel
elements are illustrated in Figure 3 and described in Table 1. The lettered locators in Figure 3 correspond to the
lettered descriptions of Table 1.
Figure 3. Controls and Indicators
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