Crestron part number C2N-IO
The Crestron C2N-IO is a compact control port expansion module that adds one RS-232, one IR/serial and two relay ports to a Crestron 2-Series, 3-Series or 4-Series control system. It connects over the Cresnet control network, takes its 24 VDC power from Cresnet and fits within a 2-gang wall box.
Price on request
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Need it installed? Our Crestron certified engineers install, set up and programme everything we supply. A 4 hour visit is €440 and a full day €880, plus VAT.
About the Crestron C2N-IO
As an outboard module, the C2N-IO gives extra control ports to a Crestron touch screen control system or any other Crestron control system. It provides one RS-232 port, one IR/serial port and two relay ports, and interfaces with the control system over the Cresnet control bus. Power is 24 VDC from Cresnet, so no separate power supply is needed.
The module is very compact and fits within a 2-gang wall box. Alternatively it can be fixed to any flat surface with two screws or with the supplied 3M Dual Lock reclosable fastener, and a surface mount bracket comes with it. When adding one to an existing system, check that the control system is 2-Series, 3-Series or 4-Series, as these are the families Crestron lists.
Key features
- Adds 1 RS-232, 1 IR/serial and 2 relay ports
- Compatible with Crestron 2-Series, 3-Series and 4-Series control systems
- Connects over the Cresnet control bus
- 24 VDC Cresnet powered
- Fits within a 2-gang wall box
- Surface mount bracket and 3M Dual Lock fastener included
C2N-IO specifications
| Control ports | 1 x RS-232, 1 x IR/serial, 2 x relay |
|---|---|
| Control network | Cresnet |
| Power | 24 VDC from Cresnet |
| Compatibility | Crestron 2-Series, 3-Series and 4-Series control systems |
| Mounting | Fits within a 2-gang wall box; flat surface with two screws or adhesive reclosable fastener |
| Included | Surface mount bracket; 3M Dual Lock reclosable fastener |
Part numbers on this page
| Part number | Version | Price | Add |
|---|---|---|---|
| C2N-IO | Standard | On request |
Where the C2N-IO is used
Crestron installed by 1Install
We supply, install and programme Crestron in homes and businesses across Ireland. These photos are from our own installations. See more in our projects, or budget a whole system with our Quote Builders for homes and meeting rooms.



Questions about the Crestron C2N-IO
What is the Crestron C2N-IO?
It is Crestron's Control Port Expansion Module, a very compact outboard unit that gives a Crestron control system, including a touch screen control system, extra control ports. It connects over the Cresnet control network and fits within a 2-gang wall box.
Which control systems is the C2N-IO compatible with?
Crestron lists it as compatible with any Crestron 2-Series, 3-Series or 4-Series control system. It interfaces through the Cresnet control bus, and Crestron also describes it as a way to add control ports to a Crestron touch screen control system.
How is the C2N-IO powered?
It is powered at 24 VDC from the Cresnet control network, which is also how it communicates with the control system. That means its Cresnet connection handles both power and control for the module.
Will the module fit in a wall box?
Yes. It is very compact and fits within a 2-gang wall box. It can instead be fixed to any flat surface with two screws or the supplied 3M Dual Lock adhesive reclosable fastener, and a surface mount bracket comes with it.
What ports does the module provide?
It provides one RS-232 port, one IR/serial port and two relay ports. The control system reaches these ports through the module's Cresnet connection, so they act as additional control ports for the Crestron 2-Series, 3-Series or 4-Series system.
How much is the Crestron C2N-IO?
Crestron asks its dealers to give the price of the C2N-IO directly rather than publish it online. Add it to your quote list and we will send you a written quote, with delivery, and installation and programming if you need them.
Can 1Install supply, install and programme the C2N-IO?
Yes. 1Install is an authorised Crestron Elite Partner with offices in Skerries, Co. Dublin and Cork. We can supply the C2N-IO on its own, or install, set up and programme it as part of your system. Installation visits are €440 for 4 hours or €880 for a full day, plus VAT and travel.
Does the C2N-IO come with a warranty?
Yes. Everything we supply is new, genuine Crestron with Crestron's standard warranty. If the C2N-IO develops a fault, contact us and we will handle the claim with Crestron. If we installed it, our workmanship is guaranteed for the lifetime of the system.
Is the C2N-IO in stock?
We order Crestron for each quote, so availability depends on Crestron's stock at the time. We check it before we quote and put the expected delivery date on your quote, so you know where you stand before you pay.
Can I buy the C2N-IO without installation?
Yes. We supply Crestron to end users, with or without installation. Like most Crestron devices of this type, it needs setting up or programming before it works in a system, and we can quote for that too.
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