7.1. Analogue Output
The analogue output (-1...0...1 VDC) can be used to serve appropriate data loggers, recorders, printers or other
monitoring equipment. The signal`s adjustment, zero-taring is carried out by taring the instrument. +/-1 VDC
corresponds to the maximum and minimum full scale (end of nominal measuring range); the algebraic signs
shown on the display correspond with the values of the analogue output. To make use of the analogue output,
the analogue cable (Order No.: FMI-931) should be ordered.
Specification
Amplitude
Signal generator
Signal update
7.2. Switching output
For each effective direction there is one NPN-transistor-outlet available. Please order the cable for test stands
(order no.: FMI-931TS) for application in motorised test stands.
7.2.1. Specification of the Output
Specification
Output
Voltage
Max. power
Circuit drawing
7.2.2. Overload outlet
The force gauges are constructed in a way that short-time overloads of up to 200% of the measurement range's
end value will not result in a damage of the internal sensor. For safety reasons, however, an overload signal
operates already when the 120% bench mark is reached. Especially in test stand applications, this is supposed
to attain an automatic shut-down of the test stand. In the case of instruments of the FMI-220 series, this signal
will only operate if the threshold value monitoring function is not activated.
7.2.3. Switching output of threshold value monitoring, only FMI-220 and FMI-230
If the threshold value monitoring function is activated the switching outlet will run according to the principle
described in Chapter 5.3..
7.3. RS-232C Interface
The RS-232C interface can be used for direct communication with a PC`s appropriate I/O-card. The minimum
requirement for data transfer up to 19200 baud is the connection with the RXD, TXD and GND communication
terminals. The applicable RS232-cable (Order No.: FMI-931PC) is included in the scope of supply of force gauges
with interfaces.
7.3.1. Specification of the RS-232C interface
Specification
Baud rate
-1VDC / +1VDC
12-bit D/A-Converter
100 Hz
1000Hz in the case of FMI-220/FMI-230
NPN Open Collector
30VDC
5 mA (Impedance 10 kOhm)
2400, 4800; 9600 or 19200 (selectable, see general settings)
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