The C225 module provides the main processor and communication for zone control and integrated iZone control.

To see an example of where the C225 is connected into to a typical system click here



3 x RJ 45 Ports

These RJ45 ports are used for connecting the CAT 5E cables from the touch screens or the multiplexer.

RF antenna

433Mhz antenna is screwed on here. This is used for communication with wireless sensors CRFS and WiFi bridges COCB and CL5BK

Zone damper ports

Connect the RJ12 (RJ11 on older systems) cables from the damper motors here. Start at zone 1 and connect sequential ports. ie 1,2,3,4.......etc

Transformer JST VA connection

Connect the iZone transformer here. Part number CT24ACE

C225 ID number

This is the unique ID number for the C225. When paired to the bridge the bridge will adopt this number automatically and it will then be the system ID.

C325 or CEXT connection ports

When used for integrated AC / Zone control an AC module is connected to the C225. This module is a C325. Each different brand of AC unit has its own unique C325 module. CEXT modules can also be connected here to extend the number of zone ports. To view assembled product please click on this link.

Supply air temperature sensor port

The supply air sensor is plugged into the C225 here. The supply air sensor is only need for systems that have zone temperature controls

Pair button

The pair button can be used to pair wireless remote controls (C400FOB & C410FOB) as well as wireless sensors CRFS and iZone WiFi bridges (COCB and CL5BK)

AC unit connection

Connect the shielded, 2 core cable from the AC unit to the C225 here. This is a spring loaded wire terminal see here for specifications




Central Processing Unit Specification


Model numbers


Power supply

24VAC 50Hz

Casing material

Fire retardant ABS plastic

Power connection

iZone transformer CT24ACE

Operating Temperature

Up to 65oC

Communications protocols

Wired CAN Bus

Wireless 433Mhz (iZone proprietary protocol)

Number of zones

0 to 8 (RJ11 or RJ12 connectors)

O/A Dimensions

Height (Without Antenna)   32 mm

Height (With Antenna vertical) 124mm

Width    119 mm

Length  117 mm


200 g






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