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Terminal UP this clamps pair is not used
+
+
+
+
+
+
+
+
+
–
–
–
–
–
–
–
–
–
A OUT
A IN DOUT DIN
UP
1
1 1 1
0
0 0 0
Fig. 3.6: Description of analog and digital inputs and outputs
3.4.2. Parameters
Tab. 3.5: Table of digital and analog input and output parameters
passive
2 × optically separated
digital output
• bipolar SSR switch design
• voltage for supplying load max. 30 V DC, 24 V AC
• switched current typically 300 mA
• resistance in on state max. 1 Ω
• protection against current overload in on state
• protection against overvoltage in off state
passive
2 × optically separated
digital input
• passive optical element design
• input voltage 0–2,3 V will be evaluated as log. 0
• input voltage 2–30 V will be evaluated as log. 1
• max. value of input voltage 30 V
active
2 × optically separated
analog output
• current source 4–20 mA
• load resistance max. 250 Ω
• settings accuracy better than 0.1 %
passive
2 × optically separated
analog input
• sensitivity 0–20 mA (or after sw configuration 4–20 mA)
• accuracy of measured values better than 0.1 %
• input resistance 60 Ω
• no protection against current overload
• max. value of input current 50 mA
Analog inputs 0 and 1 have connected terminals - (minus), which are galvanically separated from the
modem GND.
13© RACOM s.r.o. – Wideband modems – PROFI MX160
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