24VAC CPU transformer
Part number: CT24ACE
Description
The CT24ACE is the primary power supply for iZone C225-based systems. Converts 240VAC mains power to 24VAC and powers the C225 CPU, all zone dampers, connected modules, and touch screens.
warning
Do not hard-wire the CT24ACE into the AC unit's power supply. It must be powered from an earthed AU GPO on a separate circuit. Violating this may void warranty.
Installation guide
Installation steps
- Plug the CT24ACE into an earthed AU GPO — must be on a separate circuit from the AC unit
- Route the 24V lead (~1400mm) to the C225 CPU location
- Connect the JST plug on the 24V lead to the power input on the C225
- Verify output is ~24VAC with a multimeter before connecting to the C225
Specifications
| Entry | Description |
|---|---|
| Model numbers | CT24ACE (earthed) · CT24AC (older, not earthed) |
| Input | 240V ~ 50Hz |
| Output | AC 24V, 1800mA, 43W (52W peak) |
| 240V lead length | ~1400 mm |
| 24V lead length | ~1400 mm |
| Dimensions | H: 65mm · W: 75mm · L: 99mm |
| Weight | 1285 g |
Included in
C546K
Nova CAT kit
C545K
Nova DC kit
C536K
Nova Mini CAT kit
C535K
Nova Mini DC kit
C430+K
Nexus+ kit
C420K
Nano kit
C405K
Naked 8-zone kit
C110K
Nimble kit
Related parts
Documents
Troubleshoot guide
Read more
System has no power
- Confirm CT24ACE is plugged into an active GPO switched on at the wall
- Measure transformer output with a multimeter — should read ~24VAC
- Ensure the JST plug is fully seated in the C225 power port
- Do not wire the transformer directly to the AC unit power supply
Firmware history
No firmware — the CT24ACE is a passive transformer.