SmartPads and tBases are best set up on plastic shelving
To avoid the electromagnetic power fields of different units interacting there must be a minimum of 10cm horizontal and 40cm vertical separation between them, as shown in Figure 1.
Figure 1: Example arrangement of 6 SmartPads or tBases on plastic shelving with a metal frame
If the SmartPads or tBases show a solid red light it is likely they are positioned too close together and must be separated further. Also check to ensure they are not too close to any metal brackets or supports and then reset the SmartPad or tBase by disconnecting and reconnecting the power cable.