Basler Electric DGC-2020HD - Manual (Page 28)

18 9469300990 Rev B
Table 1. Rear Panel Terminal and Connector Descriptions
Locator Description
A The majority of external, DGC-2020HD wiring is terminated at 5-, 7-, or 15-position
connectors with spring clamp terminals. These connectors plug into headers on the
DGC-2020HD. The connectors and headers have a dovetailed edge that ensures
proper connector orientation. Each connector and header is uniquely keyed to ensure
that a connector mates only with the correct header. Terminals accept a maximum
wire size of 12 AWG (3.31 mm
2 ).
B This male DB-9 connector is provided for external dial-out modem communication and
the future implementation of other communication protocols. Contact Basler Electric for
protocol availability.
C DGC-2020HD Ethernet communication uses the Modbus™ TCP protocol to provide
remote metering, annunciation, and control. Dual copper (100Base-T) ports (style
xxxxDxxxx) use standard RJ-45 jacks while a fiber optic (100Base-F) port (style
xxxxFxxxx) uses two BNC fiber optic connectors.
Ethernet ports have different designations depending on style:
Dual copper (Style xxxxDxxxx) – The RJ-45 jack nearest to the mini-B USB port is
designated as Ethernet port 1 and is reserved for intergenset communications (load
sharing). The other RJ-45 jack is designated as Ethernet port 2 and can be configured
for redundant intergenset communications or for an independent network connection.
Fiber optic (Style xxxxFxxxx) – The fiber optic port is designated as Ethernet port 1
and is reserved for intergenset communications (load sharing).
Figure 4 shows both Ethernet port styles (dual copper and fiber) for clarity. The DGC-
2020HD comes equipped with only one port style, not both.
D The mini-B USB jack mates with a standard USB cable and is used with a PC running
BESTCOMSPlus
® software for local communication with the DGC-2020HD.
E Connections to the Start, Run, and Pre output contacts are made directly to each relay
through quarter-inch, male, quick-connect terminals.
F An onboard battery maintains DGC-2020HD timekeeping during losses of operating
power. See the Timekeeping chapter, for instructions on replacing the battery. Failure
to replace the battery with Basler Electric P/N 38526 may void the warranty.
Terminals
DGC-2020HD connections are dependent on the application. Incorrect wiring may result in damage to the
controller.
Note
Be sure that the DGC-2020HD is hard-wired to earth ground with no
smaller than 12 AWG (3.31 mm
2 ) copper wire attached to chassis
ground (terminal 50) on the rear of the controller.
Operating power from the battery must be of the correct polarity. While
reverse polarity will not cause damage, the DGC-2020HD will not
operate.
The DGC-2020HD terminals are grouped by function and include operating power, current sensing,
voltage sensing, engine sender input, magnetic pickup input, contact sensing, output contacts, CAN
interface, RS-485 interface, AVR control, GOV control, Load Share, IRIG source, Remote Display Panel
connection, USB port, Ethernet communication, and RS-232 communication.
DGC-2020HD terminals are described in the following paragraphs.
Terminals and Connectors DGC-2020HD