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Terminals and Connectors DGC-2020HD
Table 2-1. Rear Panel Terminal and Connector Descriptions
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
). Remove (strip) 0.4 inch (10 mm) of insulation from
each wire end inserted into a connector terminal.
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
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 and a fiber optic (100Base-FX) port (style
xxxxFxxxx) uses one ST fiber optic connector.
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 ST fiber optic port is designated as Ethernet
port 1 and is reserved for intergenset communications (load sharing).
Figure 2-1 shows both Ethernet port styles (dual copper and fiber) for clarity. The
DGC-2020HD comes equipped with only one port style, not both.
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.
Connections to the Start, Run, and Pre output contacts are made directly to each relay
through quarter-inch, male, quick-connect terminals.
An onboard battery maintains DGC-2020HD timekeeping during losses of control
power. See the Maintenance 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.
Be sure that the DGC-2020HD is hard-wired to earth ground with no
smaller than 12 AWG copper wire attached to chassis ground
(terminal 50) on the rear of the controller.
The DGC-2020HD terminals are grouped by function and include control 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.
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