DRT-301M User Manual
Shanghai Fengyilong Electronic Co,. Ltd.
www.china-meters.com
Email:[email protected]
021-60975591/ 60975592
Communication port
DRT-301M has equipped a far infrared port and a RS485 port, we can program the meter’s
operation data or reading via these 2 ports. The communication protocol conforms MODBUS RTU
protocol & DL/T645 option.
Far infrared communication port
The far infrared communication port is on the left of LCD screen. It is infrared wireless
communication port. The TP900 hand-held programmer can directly communicate the data
between the meter and this port.
The data transmission speed is 1200bps(default).
The communication distance is not less than 5m.
Rs485 output
RS485 communication port is between the meter terminal 11 and 10.
It is a synchronization wire port. Installing a software in PC, via RS485 adapter
Connecting the terminal 11 and 10, PC can communicate with the meter immediately.
1.13 Troubleshooting
CAUTION
During reparation and maintenance, do not touch the meters connecting
clamps directly with your bare hands, with metal, blank wire or other
material as you will have the chance of an electricity shock and a possible
chance for health damage.
Turn off and lock out all power supplying the energy meter and the
equipment to which it is installed before opening the protection cover to
prevent the hazard of an electric shock.
WARNING
Maintenance or reparation should be performed by qualified personnel
familiar with applicable codes and regulations.
Use insulated tools to maintain or repair the meter.
Make sure the protection cover is in place after maintenance or reparation.
