CDA70 MODEM DESCRIPTION
11
2.5.2.
Connection of PORT1 connectors (MBUS)
Panel socket RJ45
Pin
number
Signal
mark
Description
Data flow direction
1
SGND
Signal and supply ground
2
SGND
Signal and supply ground
3
TxRx-
MBUS B (-)
Input/Output
4
TxRx+
MBUS A (+)
Input/Output
5
TxRx-
MBUS B (-)
Input/Output
6
TxRx+
MBUS A (+)
Input/Output
7
+12V EXT External power 10,8 ÷ +15,6V
8
+12V EXT External power 10,8 ÷ +15,6V
ATTENTION! External supply is for converter MBUS!
The converter must have external power supply because of galvanic separated.
Circuit example of the meter with modem CDA70:
Pin 1 – SGND
2.5.3.
Connection of PORT2 connectors (RS485G)
Panel socket RJ45
Pin
number
Signal
mark
Description
Data flow direction
1
GND
Signal and supply ground
2
GND
Signal and supply ground
3
TxRx-
RS485 B (-)
Input/Output
4
TxRx+
RS485 A (+)
Input/Output
5
TxRx-
RS485 B (-)
Input/Output
6
TxRx+
RS485 A (+)
Input/Output
7
+12V EXT External power 10,8 ÷ +15,6V
8
+12V EXT External power 10,8 ÷ +15,6V
ATTENTION! External supply is for converter RS485G!
The converter must have external power supply because of galvanic separated.
Pin 2 – SGND
Pin 3 – MBUS (-)
Pin 4 – MBUS (+)
Pin 5 – MBUS (-)
Pin 6 – MBUS (+)
Pin 7 – +12V EXT
Pin 8 – +12V EXT
Modem CDA70
Meter
DC
+
Содержание CDA 70
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