Winco DGC-2020 - Manual (Page 115)

9400200990 Rev B DGC-2020 Installation 6-3
CONNECTIONS
DGC-2020 connections are dependent on the application. Incorrect wiring may result in damage to the
controller.
Terminations
All DGC-2020 terminals are located on the rear panel of the controller. There are three types of interface
terminals: a mini-B USB socket, plug-in connectors with screw-down compression terminals, and quarter-
inch, male, quick-connect terminals. Controllers equipped with the optional, internal dial-out modem have
an additional RJ-11 jack.
The mini-B USB socket mates with a standard USB cable and provides local communication between the
DGC-2020 and a PC running BESTCOMSPlus software.
The majority of DGC-2020 connections are made with 15-position connectors with screw-down
compression terminals. These connectors plug into headers on the DGC-2020. 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. Connector screw terminals
accept a maximum wire size of 12 AWG. Maximum screw torque is 4 inch-pounds (0.45 N
•m).
Connections to the DGC-2020 starter, fuel solenoid, and glow plug output contacts are made directly to
each relay through quarter-inch, male, quick-connect terminals. Amp part numbers 154718-3 (positive-
lock receptacle) and 154719-1 (nylon housing) are the recommended components for making
connections at these terminals.
DGC-2020 terminal groups are described in the following paragraphs.
Operating Power
The DGC-2020 operating power input accepts either 12 Vdc or 24 Vdc and tolerates voltage over the
range of 6 to 32 Vdc. Operating power must be of the correct polarity. Although reverse polarity will not
cause damage, the DGC-2020 will not operate. Operating power terminals are listed in Table 6-1.
Table 6-1. Operating Power Terminals
Terminal Description
1 (CHASSIS) Chassis ground connection
2 (BATT–) Negative side of operating power input
3 (BATT+) Positive side of operating power input
Generator Current Sensing
The DGC-2020 has sensing inputs for A-phase, B-phase, and C-phase generator current. Depending on
the style number, a DGC-2020 will have a nominal sensing current rating of 1 Aac or 5 Aac. A style
number of 1xxxxxxxx indicates 1 Aac nominal current sensing and a style number of 5xxxxxxxx indicates
5 Aac nominal current sensing. Generator current sensing terminals are listed in Table 6-2.
NOTE
Be sure that the DGC-2020 is hard-wired to earth ground with no smaller than 12
AWG copper wire attached to the chassis ground terminal (terminal 1) on the
rear of the controller.
Operating power from the battery must be of the correct polarity. Although
reverse polarity will not cause damage, the DGC-2020 will not operate.