Which M-Bus – OMS Module is better for my project?

ECL-MBUS ECL-WMBUS
Connectivity
  • Wired
  • Wireless
Physical
  • 41x10x24,5mm
  • 41x10x24,5mm
Environmental
  • -35… +75 C operating temperature
  • -35… +75 C operating temperature
Power Input
  • +12VDC supply max: 500mA for M-Bus
  • 3.3VDC for TTL interface
  • +3.3 VDC supply max:50mA
Serial Interface
  • 3V3 TTL UART
  • Baud Rate : 300bps-19200bps
  • 3v3 TTL UART
  • Baud Rate : 115200bps
M-Bus Interface
  • 35,5 VDC Bus voltage
  • Max Output Current 110mA
  • Max current requirement of 1.5mA per slave
  • Up to 1 km cable length
  • 433,868,915MHz ISM
  • TX at +10 dBm: 13.4 mA
  • Receiver Sensitivity -124 dBm Using Long-Range Mode, -110 dBm at 50 kbps
  • Selectivity (+,- 100kHz): 56 dB
  • Blocking Performance (+,- 10 MHz):90 dB
  • Programmable Output Power up to +15 dBm
  • Single-Ended or Differential RF Interface
  • Suitable for Systems Targeting Compliance with Worldwide Radio Frequency Regulations
  • U.FL socket connector
  • Optional Chip antenna support
# of Slaves Max 64 Slaves
Stack Support
  • T1, C1, T2, C2 Modes
  • Ready M-Bus stack