Communication interface, Rs-485 (optional), Canbus – Winco DGC-2020 User Manual
Page 18: Modem (optional), Real-time clock, Clock holdup
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DGC-2020 General Information
9400200990 Rev B
Increment: 0.1
s
Accuracy:
±15 ms
Communication Interface
USB
Specification Compatibility:
USB 2.0
Data Transfer Speed:
9600 baud
Connector Type:
Mini-B jack
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
CAUTION
Replacement of the backup battery for the real-time clock should be performed
only by qualified personnel.
CAUTION
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
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.