Neptronic CMMB102 : Dual Mini I/O Communication Module, 24 VAC/DC, 4 Universal Inputs, 2 Universal/ 2 Binary Outputs (Supervised), 4 Override Switches, BACnet MS/TP or Modbus RTU, DIN Rail Mounting, LED Status (Additional shipping or handling charges may apply. Contact sales@energycontrol.com for a quote.)