E-Mon E-MM-RTU-D-N - Manual (Page 17)

Chapter 2 Installation Communications
Multi-Mon Multiple Circuit Energy Monitor 17
2
BFM136 BFM136 BFM136
R t 1
MASTER
R S -2 3 2 R X D T X D T X E N A B L E
R X D
R S -4 2 2 / R S -4 8 5
T X D
P O
W
E
R
UP TO 32 POWERMETERS
CABLE MAXIMUM LENGTH 1000M
RS485 RS232
RS485/422-232
+
SHLD
-
CONVERTER
SHLD SHLD SHLD
R t
S U P P L Y COMMUNI CATION CONVERTER
N L P O W
E R
- + - + - +
t1, R t R 2=200-500 Ohm, 0.5W
+ + +
Figure 2 Figure 2 Figure 2 Figure 2----10 RS 10 RS 10 RS 10 RS----485 multidrop connection 485 multidrop connection 485 multidrop connection 485 multidrop connection
+Tx -Tx
-Rx +Rx
RS-422 COMMUNICATION PORT
4 WIRE CONNECTION
SYSTEM
TO COMMUNICATION
Tx
Rx
Tx Rx
Figure 2 Figure 2 Figure 2 Figure 2----11 RS 11 RS 11 RS 11 RS----422/485 4 422/485 4 422/485 4 422/485 4----wire connection wire connection wire connection wire connection