The RF5501-433 keypad combines a standard PC5132 receiver with an LCD5501Z. Keypad that presents system status using an LCD-style display with fixed messages. With the addition of the receiver portion, the control panel will now support up to 32. The RF5501-433 is compatible with the following DSC security systems. PC5010 (all versions). PC1555(MX)/1565 v2.3 & higher. PC5008 v2.3 & higher. PC5015 (all versions). Power608 v2.3 & higher. PC580/585 v2.3 & higher. PC5020 all versions.