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34 Micro Motion 7829 Viscomaster
®
and Viscomaster Dynamic
™
Viscosity Meters
Electrical Connections
Figure 3-9 Modbus connections > 100 m
The default configuration of the KD485-ADE has Port 2 configured for 9600 baud. This is the correct
baud rate for the meter. (See Section 3.8.4 for details).
The switch on the KD485-ADE should be set with SW1 On (to enable half-duplex operation on Port
2), with the other three switches (SW2, SW3, SW4) set to Off.
Note: In most systems, the ground (GND) connection on pin 6 of port 2 will be unnecessary.
When two or more devices are connected on the same RS-485 network, this is known as a multi-drop
configuration (see Section 3.8.3). Each device must be configured with its unique slave address
before being installed on the network.
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