SD34002g_e.doc / Sep-13
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3.5. Switching Outputs K1 – K4
SD340 provides four presets and outputs with programmable switching characteristics.
K1 – K4 are fast-switching and short-circuit-proof transistor outputs with a switching capability
of 5 – 30 volts / 350 mA each. The switching voltage of the outputs must be applied remotely
to the Com+ input (terminal 29)
3.6. Serial Interface
The serial RS232/RS485 interfaces can be used for the following purposes:
Set-up of the unit by PC (if desirable), by means of the OS32 PC software
Change of parameters during operation
Readout of actual counter or other values by PLC or PC
The figure below explains how to connect the SD340 unit and a PC using the standard Sub-D-9
serial connector, and how to connect the RS485 terminals to a PLC.
Details about serial communication are shown in chapter 9.
2
3
5
RxD
RxD
TxD
TxD
GND
Screen
PC
SD 340
SA 340
SR 340
14
(Sub-D-9)
30
31
RS 232
PLC
SR 340
16
15
RS 485
A(+)
B(-)
A
B
Where both, RS232 and RS485 interface are in use, you can communicate by the one or
by the other, but not by both interfaces at the same time
3.7. Fast Analogue Output (SA models only)
An analogue output is available with all SA models, providing a voltage output of +/- 10 volts
(Load = 2 mA), and a current output of 0 – 20 mA or 4 – 20 mA (load = 0 – 270 Ohms). All output
characteristics like beginning of conversion range, output swing etc. are freely programmable
via menu. The response time of the analogue output depends on the mode of measuring and
the sampling times used. The analogue resolution is 14 bits.
Please note that extensive serial communication with the unit may temporary increase the
analogue response time.
