AmsW-MBUS

• A-Bus two-way communication with A-Bus masters, e.g. AmsCPU, AmsCPU-IO
• The module is a Wireless MBUS master in accordance with EN13757- 4. It can communicate in the following modes: T-mode, S-mode and C-mode. It can handle up to 32 different AES128 encrypted meter connections. In case of un-encrypted connections, the number is only limited by the collision in the spectrum. Wireless MBUS communication is done on 868 MHz and requires an external antenna
• 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 (green): indicates whether the A-Bus is up and running.
• The software on the AmsW-MBUS module can be updated remotely from the central server.
• New software is transferred without interrupting the normal functionality of the AmsW-MBUS 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 AmsW-MBUS module can be connected to a maximum of 10 meters.
  The AmsW-MBUS 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
  AmsW-MBUS 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, connect, 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)
• When using the wireless MBUS, connect an external antenna to the SMA connector on the module. For a selection of approved antennas, please look under Ordering Information at the bottom of the datasheet

 Datasheet – AmsW-MBUS