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.
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