Pro-C and HPC Controllers are supplied with a base 4-station module. Additional modules may be added separately in increments of 3 stations (PCM300), 9 stations (PCM900), or 16 stations (PCM1600). In total the system may be expanded up to 23 stations.
Hunter Pro-C Expansion Modules – 3, 9 & 16 Zones
$120.60 – $577.79
Note: To expand your controller to 16 or 23 stations with a PCM900 or PCM1600, respectively, install one PCM300 in the first expansion slot.
Then install the PCM900 or PCM1600 in the upper two expansion slots. These modules will not fit or operate in any other station output slots.