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1MRS750881-MUM
Remote Monitoring and Control Unit
Technical Reference Manual
REC 523
6.2.
Communication interfaces
The REC 523 offers interface for various type of communication media used in
distribution automation applications. The communication media includes:
• Public telephone lines
• Leased lines
• Digital line carrier (DLC)
• Digital cellular phones (GSM)
• Analogue or digital radio
• Optical cables
• Satellite communication
Fig. 6.2.-1 Radio telephone connection
Table 6.1.-1
9-pin communication port signal layout
A040383
Connector X5.1 F RS 232/
remote protocol
a
a. “F” after connector means female connector and “M” male connector.
Connector X5.2 M RS 232/
SPA parametrization
a
Connector X5.3 F
RS 485/
LON or SPA
a
1
1
1
DATA_A
2
RXD
2
RXD
2
DATA_B
3
TXD
3
TXD
3
RTS_A
4
(do not connect)
4
+15 V
4
RTS_B
5
GND
5
GND
5
LON_COL_A
6
6
DSRB
b
b. When DSRB pin is set to +15 V, SPA bus protocol is in use (9600, even, 7 data bits, 1 stop bits, SPA
bus address 1.
6
LON_COL_B
7
RTS
7
RTS
7
GND
8
CTS
8
8
xLON_Switch
9
9
9
VCC
1
5
6
9
REC 523
X7.1
6
7
Radio_b
RADIO
TELEPHONE
+12 V
GND
TX-LINE >
RX-LINE <
Radio ON
SQUELCH
STATE
X5.1
RS232
Modem