Analog input
A/D converter resolution 24 bits
Input ranges "Voltage" 0-50 mV; 0-1.25 / 5 / 10 V
R
i
with reference to ground 4 MOhms typ. / 100 kOhms typ.
R
i
with floating voltages > 100 MOhms
Accuracy 0.1 % of full scale
Resolution 0-50 mV: 50 µV; rest: 1 mV
Measuring time < 350 msec
Galvanic isolation (optional) 500 V
Input ranges "Current" 0-20 mA; 4-20 mA
R
i
50 Ohms typ. / 400 Ohms max.
Accuracy 0.1 % typ. / max. 0.3 % of
full scale
Resolution 1 µA
Measuring time < 350 msec
Supply voltage for external sensors typ. 24 V; max. 28 V at supply
voltage > 24 V
Max. output current 25 mA
Galvanic isolation (optional) 500 V
"Potentiometer" input range 0-5.5 kOhms
Accuracy 1000 ppm of full scale
Resolution 100 ppm
Measured value output 0 … 120 %
(of nominal value of potentiometer)
Measuring time 1000 msec
Wire break detection at typ. >13 kOhms
"Pt 100" input range –40 - +85 °C
Accuracy ±0.1 K (–40 - +70 °C; w/o cable)
Resolution 0.01 K
Measuring time 850 msec
Galvanic isolation (optional) 500 V
Input RS-232 interface
Protocol OTT protocol (instantaneous value, last saved
value, time synchronization; pins 2, 3 + 5)
Pin assignments
Pin Signal Direction
1 Carrier Detect DCD In
2 Receive Data RxD In
3 Sent Data TxD Out
4 Data Terminal Ready DTR Out
5 Ground GND GND
6 Data Set Ready DSR In
7 Request To Send RTS Out
8 Clear To Send CTS In
9 Ring Indicate RI In
Worst case timeout per measured value 55 sec
Input RS-485 interface
Protocol OTT protocol; SDI-12 via RS-485; Modbus
Interface layout 2-wire, half-duplex
Transfer speed 1 200 … 57 600 bps
Line termination Yes, 120 ohm
Input SDI-12 interface
Protocol SDI-12 specifications, V 1.3
Interface layout SDI-12 specifications, V 1.3
Outputs (depending on configuration)
Switching output
Voltage max. 16 V
DC
Leakage current < 1µA/28 V
DC
Current capacity max. 5 A
(no fuse provided, external fuse required)
57
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