AmsSense

• A-Bus two-way communication with A-Bus masters, e.g. AmsCPU, AmsCPU-IO
• According to ANSI TIA/EIA-485-A, half duplex.
  The module supports the following protocols: General purpose serial communication, DLMS mode C, DLMS/COSEM (HDLC), Modbus
• The module is automatically discovered by the AmsCPU module. In case a module is disconnected from the AmsCPU module, this is reported to the server application and the module is listed as missing. If the module is reconnected to the AmsCPU module or another AmsCPU module, it will be rediscovered by the system.
• The real-time clock is automatically synchronized with the AmsCPU module which in turn is synchronized with the Network Time Protocol (NTP).
• AMS Status LED (orange): indicates whether the A-Bus is up and running. RS485 Data LED (orange): indicates data traffic on RS485.
• The software on the AmsSense module can be updated remotely from the central server.
• New software is transferred without interrupting the normal functionality of the AmsSense module. When the software has been transferred, the integrity of the software is checked and the software is installed.
• A built-in self-test (BIST) is performed after power-up.
• Watchdog and brown-out reset ensure that the system is up and running at all times.

• A-Bus client module
• For use with Amplex service tools.
• RS485 A and RS485 B connect to one meter or a collection of meters.
  A = inverting pin and B = non-inverting pin.
  The AmsSense module can be connected to a maximum of 10 meters.
  The AmsSense module has an internal termination resistor (120 Ohm)
  between RS485 A and RS485 B.
• Two inputs for industrial standard PT100 temperature sensors that support
  2-wire or 3-wire compensation.
  Temperature range = -40°C to +150°C
  Accuracy = ± 1°C
• Two digital active-high inputs: Input/Output 1 and 2.
  Input impedance = 510 Ohm (DC)
  Input voltage low = 0-1 V
  Input voltage high = 3-24 V
  AmsSense reads 0-1 V as logic 0/off and anything above 3 V as logic 1/on. The inputs are functional up to an input voltage of absolute max 30 V
• Two open-collector outputs for driving, e.g. relays, optocouplers, etc.: Input/Output 1 and 2.
  Max current sink = 70 mA
  Max voltage = 30 V
  When Input/Output 1 and 2 are used as digital outputs, e.g. to drive external relays: See datasheet for examples. Reverse diodes are internally mounted.
  
• Two analog inputs: Input 3 and 4, see datasheet.
  Analog input 0-10 V, 4-20 mA (0-20 mA)
  Impedance = 510 Ohm (DC)
  Accuracy = ± 2% FSD
  Can also be used as digital input:
  Threshold of approximately 1 V
  Max input voltage = 12 V (12 VDC out on pin 1)

 Datasheet – AmsSense