100-240VAC 12VDC 500MA 2.1MM PLUG POWER SUPPLY SW1250AR
18 CHANNEL CAMERA POWER SUPPLY 10 AMP
24VAC TO 12VDC CONVERTER AC to DC
12V Converter 24VAC input 50HZ/60HZ - 12VDC 1.5A (MAX)
Camera Voltage Converter for 24vac systems
Now you can use any 12vdc cameras on your 24vac system.