Analog Input submodules The analog submodules are plug-ins for the communication processors SSM-BG41, BG42 and BG43. They are used for the acquisition of analog signals from the process. They convert the signals from the process into digital values to be processed by the automation device.

Technical data       MD44 MD40, 41, 42, 43, 43A Supply Voltage   DC5V/DC24V (via BG module) Current consumption 100mA 133mA Number of inputs 4 8 Potential separation no yes     (inputs to source earth, not back panel) Input range PT100   (nominal values) (-200…+850°C) MD40 ±10V or o…20V     MD41 ±5V or 0….10V     MD42 ±2.5V or 0…5V     MD43 0…20mA or 4…20mA     MD43A 0..20mA or 4…20mA Input resistance   MD40min. 25 kOhm     MD41 min. 350 kOhm     MD42 min. 1 Mohm     MD43 max. 500 Ohm     MD43A max. 50 Ohm Connection type of the sensors 4-wire 2-wire     current or voltage on     common Resolution 0.1°C xx Resolution internal 19-bit xx Digital representation of the input signal 16-bit 12-bit   complement to two complement to two Measured value representation complement to two complement to two Method of measurement multi slope successive approximation Conversion time typ. 1.5µs/4-channels 10µ (per measurement) Cycle time per input max 1 msec. max 1 msec. Permissible input voltage xx max. DC200V (destruction limit) Measurement uncertainty (without sensor uncert.) max. 0.3°C max ±3% Drift xx 0.1% Insulation rating xx acc. To VDE0160 Line length shielded max 200m max 200m

Ordering information   Description Ordering number Analog Input ±10V VIPA SSM-MD40 Analog Input ±5V VIPA SSM-MD41 Analog input 0…5V VIPA SSM-MD42 Analog Input 0/4…20mA 500 Ohm VIPA SSM-MD43 Analog Input 0/4…20mA 50 Ohm VIPA SSM-MD43A Analog Input Pt100 VIPA SSM-MD44