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DGC-2020HD Terminals and Connectors
Installation in an Ungrounded System Application
When the DGC-2020HD is controlling equipment that is part of an ungrounded system, it is
recommended that potential transformers be employed on the voltage sensing inputs to provide full
isolation between the DGC-2020HD and monitored voltage phases.
Engine Sender Inputs
Inputs are provided for fuel level, oil pressure, and coolant temperature senders. For a listing of fuel level,
oil pressure, and coolant temperature senders that are compatible with the DGC-2020HD, refer to the
Engine Sender Inputs chapter in the Configuration manual. The fuel level input accepts resistive senders
only. Oil pressure and coolant temperature inputs accept either resistive or analog senders depending on
the style number.
Engine sender input terminals are listed in Table 2-7.
Table 2-7. Sender Input Terminals
74 (OIL + / ANALOG IN 4 +)
Oil pressure sender input or Analog input 4 +
75 (OIL – / ANALOG IN 4 –)
Oil pressure sender return or Analog input 4 –
76 (N.C. / ANALOG IN 4 I)
Analog input 4 (I) current input∗
77 (COOLANT + / ANALOG IN 3 +)
Coolant temperature sender input or Analog input 3 +
78 (COOLANT – / ANALOG IN 3 –)
Coolant temperature sender return or Analog input 3 –
79 (N.C. / ANALOG IN 3 I)
Analog input 3 (I) current input∗
∗ When using the current input, it must be tied to the voltage input. See the Typical Applications
chapter for a diagram.
Analog Inputs
Two user-programmable analog inputs are provided. These inputs accept a signal range of either 4 to
20 mA or 0 to 10 Vdc. Analog input terminals are listed in Table 2-8.
Table 2-8. Analog Input Terminals
Auxiliary analog 2 (I) current input∗
Auxiliary analog 1 (I) current input∗
∗ When using the current input, it must be tied to the voltage input. See Typical Applications chapter
for a diagram.
Magnetic Pickup Input
The magnetic pickup input accepts a speed signal over the range of 3 to 35 volts peak and 32 to 10,000
hertz. Magnetic pickup input terminals are listed in Table 2-9.