User Manual
Chapter 2 Installation
Communications
Multi-Mon Multiple Circuit Energy Monitor
17
2
BFM136 BFM136
BFM136
R
t
1
MASTER
RS-232
RXD
TXD
TX ENABLE
RXD
RS-422 / RS-485
TXD
POWER
UP TO 32 POWERMETERS
CABLE MAXIMUM LENGTH 1000M
RS485RS232
RS485/422-232
+
SHLD
-
CONVERTER
SHLD
SHLD SHLD
R
t
SUPPLY
COMMUNICATION CONVERTER
N
L
POWER
-
+
-
+
-
+
t
1,R
t
R 2=200-500 Ohm, 0.5W
+ + +
Figure 2
Figure 2Figure 2
Figure 2-
--
-10 RS
10 RS10 RS
10 RS-
--
-485 multidrop connection
485 multidrop connection485 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 2Figure 2
Figure 2-
--
-11 RS
11 RS11 RS
11 RS-
--
-422/485 4
422/485 4422/485 4
422/485 4-
--
-wire connection
wire connectionwire connection
wire connection