9400200990 Rev I DGC-2020 General Information 1-9
RS-485 (Optional)
Baud: 9600
Data Bits: 8
Parity: None
Stop Bits: 1
Terminals: 14 (A), 13 (B), and 12 (shield)
CANBus
Differential Bus Voltage: 1.5 to 3 Vdc
Maximum Voltage: –32 to +32 Vdc with respect to negative battery terminal
Communication Rate: 250 kb/s
Terminals: 48 (low), 49 (high), and 50 (shield)
Modem (Optional)
Connector Type: RJ-11 jack
Real-Time Clock
Clock has leap year and selectable daylight saving time correction. Backup capacitor and optional backup
battery sustain timekeeping during losses of DGC-2020 operating power.
Resolution: 1 s
Accuracy: ±1.73 s/d at 25°C
Clock Holdup
Battery Holdup Time (Optional): Approximately 10 yrs
Battery Type: Rayovac BR2032, lithium, coin-type, 3 Vdc, 190 mAh
Basler Electric P/N 38526
NOTES
1.) If the DGC-2020 is providing one end of the J1939 backbone, a 120 Ω
terminating resistor should be installed across terminals 48 (CANL) and 49
(CANH).
2.) If the DGC-2020 is not part of the J1939 backbone, the stub connecting the
DGC-2020 to the backbone should not exceed 914 mm (3 ft) in length.
3.) The J1939 drain (shield) should be grounded at one point only. If grounded
elsewhere, do not connect the drain to the DGC-2020.
CAUTION
Replacement of the backup battery for the real-time clock should be performed
only by qualified personnel.
Do not short-circuit the battery, reverse battery polarity, or attempt to recharge
the battery. Observe polarity markings on the battery socket while inserting a
new battery. The battery polarity must be correct in order to provide backup for
the real-time clock.
It is recommended that the battery be removed if the DGC-2020 is to be operated
in a salt-fog environment. Salt-fog is known to be conductive and may short-
circuit the battery.
NOTE
Failure to replace the battery with Basler Electric P/N 38526 may void the
warranty.
www . ElectricalPartManuals . com
To Next Page
Loading...
Need help?
General
