TECHNICAL DESCRIPTION Kamstrup 162M/382M
5512-1040 GB/05.2012/Rev. C1
49
8.2.2 2W module supply
The meter is equppied with a primary module area. The output connectors enable a current draw of up to 640 mA
as peak current and 150 mA as average. The meter has a limiter securing that the maximum current draw is not
exceeded.
NOTE: Be aware to mount the module correctly. It must be kept as far to the left as possible.
8.2.3 Module interface
Pin 1 GND
Pin 2 Data out
For serial communication of data from the meter.
The port type is “open drain”, 2.2nF capacitor for GND and 10K Ohm for supply
Output, high: 10K Ohm pull-up for supply
Output, low: Minimum voltage: 0V, Maximum voltage: 0.4V
Pin 3 Pulse in/out (Port 2)
For pulse transmission.
The port type is “open drain”, 10nF capacitor for GND and 1M Ohm for supply
Input, high: Minimum voltage 2.6V, Maximum voltage 5.5V
Input, low: Minimum voltage 0V, Maximum voltage 0.6V
Output, high: 1M Ohm pull-up for supply
Output, low: Minimum voltage: 0V, Maximum voltage: 0.4V
Pin 4 Pulse in/out (Port 1)
For pulse transmission.
The port type is “open drain”, 10nF capacitor for GND and 1M Ohm for supply
Input, high: Minimum voltage 2.6V, Maximum voltage 5.5V
Input, low: Minimum voltage 0V, Maximum voltage 0.6V
Output, high: 1M Ohm pull-up for supply
Output, low: Minimum voltage: 0V, Maximum voltage: 0.4V
Pin 5 Data in
For serial communication of data to the meter.
Internal 10K Ohm pull-up for supply, and 2.2nF capacitor for GND.
Input, high: Minimum voltage 2.6V, Maximum voltage 5.5V
Input, low: Minimum voltage 0V, Maximum voltage 0.6V
Pin 6 Supply
Nominal voltage 4.0 V in series with 100 ohm
Maximum current: 5 mA (@3.5 V)
Pin 7 High Power Supply
Rout < 0.6
Nominal voltage: 4.3 V ± 0.2 V (no load)
Maximum average current: 150 mA
Maximum peak current: 600 mA
Pin 8 GND (High Power )
7
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