Winco DGC-2020 - Manual (Page 37)

9400200990 Rev B DGC-2020 Functional Description 3-1
SECTION 3
• FUNCTIONAL DESCRIPTION
INTRODUCTION
This section describes how the DGC-2020 functions. A detailed description of each function block is
provided in the paragraphs under the heading of DGC-2020 Function Blocks.
DGC-2020 operating and metering features are described in Section 4, BESTCOMSPlus Software.
DGC-2020 FUNCTION BLOCKS
To ease understanding, DGC-2020 functions are illustrated in the block diagram of Figure 3-1. The
following paragraphs describe each function in detail.
Microprocessor
Power Supply
Battery Voltage Sensing
Sender Input Sensing
(To Internal Circuitry)
Generator Current Sensing
Bus Voltage Sensing
Generator Voltage Sensing
MPU Speed Sensing
Programmable Dry Contact Inputs (16)
USB Com Port
J1939 CAN Com Port
RS-485 Com Port (Optional)
Modem Com Port (Optional)
Emergency Stop Contact Input
Front Panel HMI
and LCD
Remote Display
Panel Driver
(RDP-110)
Programmable
Output Contacts
(4 or 12)
Fuel Solenoid
Output Contacts
Engine Crank
Output Contacts
Pre-start Output
Contacts
P0040-04
06-20-06
Sensing
Com Ports
Sensing
HMI
Output
Contacts
Figure 3-1. Function Block Diagram
Power Supply
The internal, switch-mode power supply uses the applied battery voltage to generate operating power for
the internal circuitry of the DGC-2020. The power supply accepts a nominal battery voltage of 12 or 24
Vdc and has an operating range of 6 to 32 Vdc. Battery voltage is applied to terminals 2 (–) and 3 (+).
Operating power must be of the correct polarity. Although reverse polarity will not cause damage, the
DGC-2020 will not operate.
Battery Voltage Sensing
Voltage applied to the power supply is filtered and reduced to a suitable level for sensing by the
microprocessor.
Microprocessor
The microprocessor controls the overall functionality of the DGC-2020 and makes decisions based on
programming and system inputs.
Circuits relating to the microprocessor inputs are described in the following paragraphs.