Specifications
CDA70 MODEM DESCRIPTION
14
2.5.4. Connection of ETH connectors (ETHERNET)
Panel socket RJ45
Pin
number
Signal mark Description
Data flow
direction
1 TXD+ Transmit Data Input/Output
2 TXD- Transmit Data Input/Output
3 RXD+ Receive Data Input/Output
4 DNC ---
5 DNC ---
6 RXD- Receive Data Input/Output
7 DNC ---
8 DNC ---
ATTENTION! Port ETH is not with POE (Power Over Ethernet) compatible!
Circuit example of the CDA70 with
to equipment with Ethernet:
2.5.5. Connection of I/O connector
Panel socket RJ45
Pin
number
Signal mark Description Data flow
direction
1 I/O 5 Input/Output - analogue or binary input or binary
output (open collector)
Input/Output
2 I/O 4 Input/Output - analogue or binary input or binary
output (open collector)
Input/Output
3 I/O 3 Input/Output - analogue or binary input or binary
output (open collector)
Input/Output
4 +12V Output + 12V for supply of other circuits
(connected directly to modem supply)
Output
5 GND Signal and supply ground
6 I/O 2 Input/Output - analogue or binary input or binary
output (open collector)
Input/Output
7 I/O 1 Input/Output - analogue or binary input or binary
output (open collector)
Input/Output
8 Service For servicing purposes only Input/Output
Circuit example of the meter with modem CDA70:
Modem CDA70
UTP cable
PWR
CIO
PORT3
PORT2
PORT1 ETH