Basler Electric DGC-2020 - Manual (Page 35)

Parity ................................................. None
Stop Bits ........................................... 1
Terminals .......................................... 14 (A), 13 (B), and 12 (shield)
RDP-110
Minimum Wire Size ........................... 20 AWG
Maximum Wire Length ...................... 4,000 feet (1,219 meters)
Terminals .......................................... 6 (RDP TXD
–), 7 (RDP TXD+)
CAN
NOTES
1. If the DGC-2020 is providing one end of the J1939 bus, a 120
Ω, ½ watt
terminating resistor should be installed across terminals 48 (CANL) and 49
(CANH).
2. If the DGC-2020 is not part of the J1939 bus, the stub connecting the
DGC-2020 to the bus should not exceed 914 mm (3 ft) in length.
3. The maximum bus length, not including stubs, is 40 m (131 ft).
4. The J1939 drain (shield) should be grounded at one point only. If
grounded elsewhere, do not connect the drain to the DGC-2020.
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)
Real-Time Clock
Clock has leap year and selectable daylight saving time correction. Backup capacitor and 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 ......................... Approximately 10 yrs
Battery Type ..................................... Rayovac BR2032, lithium, coin-type, 3 Vdc, 195 mAh
Basler Electric P/N 38526
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.
9400200990 Rev X DGC-2020 General Information 1-11