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.

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