Manual BG41/BG42/BG43 Technical data
Rev. 99/49 6-7
6.2.9 Analogue input module
MD40, MD41, MD42, MD43
Number of inputs 8
Potential separation yes (Inputs versus earth point and not
inputs against each other)
Input areas (nominal values)
- MD40 ±10 V or 0 ... 20 V
- MD41 ±5 V or 0 ... 10 V
- MD42 ±2,5 V or 0...5 V
- MD43 ±10 mA or 0...20 mA or 4...20 mA
Input resistance
- MD40 min. 250 KOhm
- MD41 min. 350 KOhm
- MD42 min. 1 MOhm
- MD43 max. 500 Ohm
Connection type of the signaling transmitter Double wire connection voltage and
current measurement on a joint reference
potential
Digital depiction of 11 bit + sign
the input signal 12 bit complement to two
Depiction of measurement value complement to two
Measurement principle successive approximation
Conversion time per measurement value 10 µs
Cycle time per input max. 1 ms
Processing time for the output on the SPS
1 value read normalized 0,4-1,2 ms
hex 0,3-0,7 ms
8 values read normalized 0,7-1,2 ms
hex 0,6-0,8 ms
3 modules(24 inputs) normalized 3,2-4,2 ms
hex 3 ms
6 modules(48 inputs) normalized 6,4-8,4 ms
hex 5,5-6,4 ms
Valid input voltage max. 200 V DC
(destruction level)
Measurement tolerance max. ± 3 %
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