Currently, each Qolsys IQ Panel 4 can support up to two (2) of these modules, which means it can support up to eight (8) wired keypads (though the use of only four (4) keypads is recommended). In addition to all of the above, each DSC PG9WLSHW8 or PG9HRDW8 converter module allows the addition of up to four (4) compatible wired keypads, though Qolsys recommends that you only use two (2) wired keypads per converter module. In addition to converting up to eight (8) wired zones to PowerG wireless, it also offers support for a wired siren output, provides power for any of the wired devices that may need it, such as motion detectors and glass break detectors, and supports up to four (4) programmable outputs.
On the Qolsys IQ Panel 4, this is achieved using the DSC PG9WLSHW8 PowerG Wired to Wireless Converter Module (or PG9HRDW8 which is the same module in a large enclosure). The most important note about this compatibility is that this is a wired keypad, therefore it requires a Corbus connection. To the panel, it's as though someone keyed in a valid user code. The keypad actually reads the prox tag and transmits its information to the panel. The key to prox tag compatibility lies in the keypad being used. The Qolsys IQ Panel 4 can support the use of prox tags to arm and disarm.
