HYDAC International AquaSensor AS 8000 Series, Operating Manual

Page: 19 / 32

AquaSensor - AS 8000 series
5.4.3 RS485 interface
Several AS 8000 Control Units or other analysis devices, as well
as bus-compatible sensors, can be linked and connected to a
computer via the RS485 interface.
If the computer has only one RS232 interface, a RS485/RS232
converter is required to convert the RS485 signals to RS232
signals.
If the computer has only one USB port, a RS 485/USB converter
is required to convert the RS485 signals to a USB signal.
5.4.4 Analog Outlet
Both electric outputs 4-20 mA (with 1 output for each AS 8000
Sensor) can be connected with a remote indication of the
sensitivity 4-20 mA, where 4 mA corresponds to a pure
component A with 0% component B, and 20 mA corresponds to
a selected mixture ratio of the components A and B (see
parameter menu, parameter view, figure 6).
If there is a sensor error, a current of 2 mA will flow. 25 mA will
flow if the mixture ratio of the components A and B is greater
than the ratio entered in the parameters menu.
5.4.5 „Ready“ Relay
The relay READY is activated (with COM and NO switched on)
when no system error exists. The system errors are displayed on
the RS232 interface in the terminal program.
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BeWa AS8000 3215331b en.doc 2007-07-12