The number of popits that can be installed on each panel depends on the panel type.
D7212B1 - 40 Popits (Zonex 1 Addresses 9 -48)
D9112B1 - 126 Popits (Zonex 1 Addresses 9 - 71 and Zonex 2 Addresses 73-135)
D7412/G/GV2/GV3/GV4 - 67 Popits (Zonex 1 Addresses 9-75)
D9412/G/GV2/GV3/GV4 - 238 Popits (Zonex 1 Addresses 9-127 & Zonex 2 Addresses 129-247)
Part numbers D7212B, D9112B, D7212B1, D9112B1, D7212, D7412, D9112, D9124, D9412, D7412G, D9124G, D9412G, D7412GV2, D9124GV2, D9412GV2, D7412GV3, D9412GV3, D7412GV4, D9412GV4, D9127, D9127T, D9127U, D8127, D8126