9469200994 Rev — 7
DGC-2020ES Terminals and Connectors
Programmable contact input 4
Programmable contact input 5
Programmable contact input 6
Programmable contact input 7
Output Contacts
The DGC-2020ES has three sets of fixed-function output contacts: Pre, Start, and Run. The Pre contacts
supply battery power to the engine glow plugs, the Start contacts supply power to the starter solenoid,
and the Run contacts supply power to the fuel solenoid. Connections to the three sets of contacts are
made at terminals 19 through 24. The Pre, Start, and Run relay terminals are listed in Table 9.
Table 9. Fixed-Function Output Contact Terminals
Start output contact (Start solenoid)
Run output contact (Fuel solenoid)
Pre-start output contact (Glow plugs)
Four programmable output contacts are provided in two sets. Each set of two output contacts share a
common terminal. Programmable output contact terminals are listed in Table 10.
Table 10. Programmable Output Contact Terminals
Common connection for outputs 1 and 2
Common connection for outputs 3 and 4
USB Interface
A mini-B USB socket enables local communication with a PC running BESTCOMSPlus software. The
DGC-2020ES is connected to a PC using a standard USB cable equipped with a type A plug on one end
(PC termination) and a mini-B plug on the other end (DGC-2020ES termination).
CAN Interface
These terminals provide communication using the SAE J1939 protocol or the MTU protocol and provide
high-speed communication between the DGC-2020ES and an ECU on an electronically controlled
engine. Connections between the ECU and DGC-2020ES should be made with twisted-pair, shielded
cable. CAN interface terminals are listed in Table 11. For typical CAN connections, refer to the Typical
Connections chapter.
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