9469200995 8-1
DGC-2020ES Contact Inputs
8 • Contact Inputs
Contact inputs are available to initiate DGC-2020ES actions. The DGC-2020ES has seven programmable
contact sensing inputs. Additional contact inputs can be accommodated with an optional CEM-2020
(Contact Expansion Module). Contact Basler Electric for availability and ordering information.
Each programmable input (Input 1 through Input 7) can be independently configured to perform the
following functions. By default, each programmable input is disabled.
• Auto Transfer Switch
• Battery Charger Fail
• Battle Override
• Emergency Stop
• Fuel Leak Detect
• Grounded Delta Override
• Low Coolant Level
• Low Fuel Level
• Low Line Override
• Single-Phase Override
The programmable inputs accept dry contacts. A contact is connected between a programmable input
and the negative side of the battery. Through BESTCOMSPlus
®
, each programmable contact input can
be assigned a name (16 alphanumeric characters, maximum) and configured as an alarm input, a pre-
alarm input, or none. The default names for the inputs are INPUT_x (where x = 1 to 7). When a
programmable contact input is closed, the front panel display shows the name of the closed input if it was
programmed as an alarm or pre-alarm input. Alarm inputs are annunciated through the Normal display
mode screens of the front panel. Pre-alarm inputs are annunciated through the pre-alarm metering screen
of the front panel. If neither alarm nor pre-alarm is programmed, no indication is given. Programming an
input as None is useful when a programmable input is used as an input to programmable logic.
Connections for the programmable inputs are provided at terminals 3 (Input 1) through 9 (Input 7). The
negative side of the battery voltage (terminal 17) serves as the return connection for the programmable
inputs.
Contact Input Configuration
Figure 8-1 illustrates the Contact Inputs screen found in the BESTCOMSPlus Settings Explorer under the
Programmable Inputs category. If using the front panel, navigate to Settings > Programmable Inputs >
Configurable Inputs.
For each contact input, configure the following parameters:
1. Alarm Configuration - Select None, Alarm, or Pre-Alarm. When an alarm occurs, the horn output
closes and the engine shuts down. When a pre-alarm occurs, the horn output toggles between open
and closed while the engine remains running. If None is selected, the input is status only. The status
is available to BESTlogic™Plus Programmable Logic regardless of Alarm Configuration setting.
2. Activation Delay - This parameter defines the duration that the input remains on before any
annunciation occurs.
3. Label Text - Enter descriptive text that signifies the use of the input. This text appears next to the
input in BESTlogic™Plus Programmable Logic and in the event log if the input is configured as an
alarm or pre-alarm.
4. Contact Recognition - Select whether the contact input should be recognized always, or only while
the engine is running. For example, a switch closes when oil pressure is low. Such a switch would be
closed when the engine is not running but a low oil pressure alarm or pre-alarm should not be
annunciated unless the switch is closed while the engine is running. A selection of While Engine
Running Only prevents spurious annunciation when the engine is not running.
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