CDX800 DESCRIPTION
Circuit example of the RS232 equipment with
modem CDX 800
:
2.6.2.
Connection of PORT1 connector (RS485)
Panel socket RJ45.
Pin
No.
Signal
mark
Description
Data flow
direction
1
---
---
2
---
---
3
TxRx-
RS485 B (-)
Input/Output
4
---
---
5
---
---
6
TxRx+
RS485 A (+)
Input/Output
7
---
---
8
---
---
Circuit example of the meter with modem CDX 800 with data length less then 10 m:
12
PORT1
PORT2
PWR
Modem CDX 800
Cable KD-2
Pin 1 – ---
Pin 2 – ---
Pin 3 – RS485 (-)
Pin 4 – ---
Pin 5 – ---
Pin 6 – RS485 (+)
Pin 7 – ---
Pin 8 – ---
Modem CDX 800
SGND
RS485 (-)
RS485 (+)
Meter
SGND
RS485 (-)
RS485 (+)
Meter
