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Page 18
Sonachron (DWA-S) can be synchronized to Lathem’s LTRx-512
master, LTR-0 master, LTR-GPS receiver, RC-MS master or
Omni:ChronII time clock reference devices. Distance from the
source can be extended using Lathem’s SWIFT485+ repeater.
Omni:ChronII Time Recorder can be equipped with an optional
RS485 transmitter for communication with the DWA-S. When
installed, the DWA-S will synchronize with the time and date
from the Omni:ChronII each minute.
When installing multiple DWA-S units, all units EXCEPT the one
at the end of the RS485 line require jumper E2 be cut. When E2
is installed, a 100 ohm terminating resistor is internally
connected across the RS485 line to reduce the signal reflection
and thereby improve reception. E2, located on the far left side of
the CPU circuit board, can be accessed by removing the left end
cap. Refer to the Figure on Page 8.