7828 Density Transmitter Technical Manual Electrical Installation
78285000_AB 3-9
To PC
4 (B)
7828
25 pin
connector
(socket)
9 pin
connector
(plug)
9 pin
connector
(socket)
2 (A)
3 (A)
6 (B)
7 (B)
3 (A)
Optional 9V
power supply
5 (GND)
9 (+9V)
+9
GND
K485-ADE
RS232/RS485
Converter
For permanent installations, and where the network length is more than 100m or so,
Solartron recommend and can supply the following DIN-rail mounted device from KK
Systems Ltd.
KD485-ADE Solartron part number 550003500
The KD485-ADE is three-way isolated, providing isolation between the two ports and the
power supply. It requires a +7 to +35V power supply and typically takes 1 to 2W; (power
consumption is largely independent of supply voltage). It is capable of working with
Windows 3.1, 95, 98, and NT.
The default configuration of the KD485-ADE has Port 2 configured for 9600 baud.
Further details of this device, including configuration, are available in the User Manual
which is supplied with the product.
The connections are shown below.
Port 1
RS232
Port 2
RS485
KD485-ADE
RS232 to RS485 Interface Converter/Isolator
Switch
Tx
Rx
Port 1 GND
RTS In
1
2
3
4
5
6
Power Input
+
-
7
8
6
5
4
3
2
1
Port 1 GND
TxB
TxA
RxB
RxA
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