Winco RDP-110 - Manual (Page 17)

9318100990 Rev E RDP-110 Functional Description 3-1
SECTION 3 • FUNCTIONAL DESCRIPTION
GENERAL
RDP-110 Remote Display Panels use microprocessor-based technology to provide remote annunciation
of various engine and generator parameters. Refer to the following paragraphs for the RDP-110
functional description.
Circuit functional description is divided into Inputs, Microprocessor, Outputs, and Software. Circuit
functions illustrated in Figure 3-1 are described in the following paragraphs.
Figure 3-1. RDP-110 Functional Block Diagram
INPUTS
There are three types of inputs to the RDP-110 Display panel. They are:
• Operating (battery) dc power
• Operating (ac) power
• Serial
interface
The following paragraphs describe these inputs.
Battery Operating Voltage
Required operating voltage is a nominal 12 or 24 Vdc. Operating voltage may be in the range of 8 to 32
Vdc. An internal switching power supply uses this battery voltage or a rectified and filtered signal from the
ac input to generate +5 Vdc. The two power inputs (ac and dc) are isolated from each other and may be
applied simultaneously.
AC Operating Voltage
Required operating voltage is a nominal 100/120 Vac 50/60 hertz. Operating voltage may be in the range
of 80 to 144 Vac. An internal switching power supply uses this ac input voltage or the battery input
voltage to generate +5 Vdc. The two power inputs (ac and dc) are isolated from each other and may be
applied simultaneously.
RS-485 Interface
The differential RS-485 input signal is converted to a single-ended signal suitable for use by the
microprocessor.