The Apex controllers can handle an enormous number of switches, not just 6. Each of the PM modules have the ability to handle 6 switches each. And since you can have up to 240 modules on an Apex, the number of switches possible is quite high. But how to address all these switches? Here's a chart to help you figure it out:
Connect I/O Breakout Box to: Switch Naming Convention Firmware < 4.30 Switch Naming Convention Firmware 4.30 + Base Module Switch1 – Switch6 Sw1 - Sw6 PX1000
AquaSurf
LunarSimSwitchA1 – SwitchA6 (1) SwA1 - SwA6 (1) PM1
PM2
PM3
ALDSwitchx5_1 – Switchx5_6 (2) Swx5_1 - Swx5_6 (2)
(1) ‘A’ is for the first expansion module, ‘B’ the second, ‘C’ the third, etc.
(2) ‘5’ varies based on that expansion module’s AquaBus number. If your PM1 is at AB #4, then the switches are named ‘SWITCHx4_1’ through ‘SWITCHx4_6’. If your PM1 is at AB #7, then the switches are named ‘SWITCHx7_1’ through ‘SWITCHx7_6’.
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