E-Mon E50-6003200J*-N-KIT - Manual (Page 29)

GREEN CLASS NET METER
29 62-0416-01
6.12 Connecting Green Class Net Meters to the USB
Key using RS485
The USB Key plugs into the PC’s USB port and provides a termination point for the
RS485 wiring from the meters. Up to 52 meters can be “Daisy chained” with up to 4000
feet total RS485 wiring. The USB Key is labeled for “plus (+)”, “minus (-)“, and ground
and the wiring must match the same positions on the meters. If more than 52 meters
are to be monitored, additional USB Keys can be utilized to connect them to the PC.
Fig. 15. Connecting Green Class Net Meters to the USB Key using RS485
PC WITH USB
USB KEY
M33425
UP TO 52, GREEN
CLASS NET METERS, ON
RS485 CABLING
UP TO 4000 FEET
TOTAL RS485 CABLE