Addressable 3 Channel I/O Unit (Reset on Reset) – CIO351

The UL 3 channel I/O unit enables simple interfacing between the fire system and other equipment, such as nurse call systems or access control systems.

The inputs are fully monitored for open and short circuits, and ground faults.

Additional information
Order Code




Product Type

Addressable Interfaces

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Easy set-up with no hard addressing required


Unit takes 3 inputs and 3 outputs for interfacing with other equipment


Connect to manage nurse call, access control and other equipment

Tailor your fire system to match project needs

An extensive range of interfaces are available to support Eaton’s range of UL listed fire system control panels, providing solutions for most design requirements. These include interfaces for system extension and retrofitting, and ones to incorporate into external equipment such as generators and HVAC. The range will help you tailor your fire system to your exact requirements.

Control and monitor more from the panel

The unit can be used for both fire and non-fire applications. Fire signal inputs include door release mechanisms while non-fire inputs include active panel functions including access control and nurse call systems.

Features and Benefits

• Soft addressed
• Integral short circuit isolator
• 3 separate inputs and 3 separate outputs
• Inputs monitored for open and short circuits
• Quick and simple to install
• No hard addressing required (Plug and play)
• Unit takes 3 inputs and 3 outputs
• Only 1 address required to monitor and control saving on equipment and installation

UL Listed 3 Channel I/O UnitULCIO351
Description: 3 Channel I/O Unit
Standards: UL864 9th edition
Signalling Line Circuit (Style 7, Class A, Supervised, Power Limited)
Operating voltage:24Vdc
Current: 1.14mA to 1.36mA
Line Impedance:50Ω
Inputs 1, 2, 3 Contact Only Initiating Circuit (Style C, Class B, Supervised, Power Limited)
Voltage: 8.4Vpp (pulsed every 1 sec)
Current: 1mA (max)
Line Impedance: 16Ω (max)
Trigger Resistance: 5.6kΩ
End of Line Resistor: 22kΩ
Output 1, 2, 3 (3 contact set programmable)
Voltage: 24Vdc to 30Vdc
Current: 1A (max, resistive PF1)
Switching Power: 33kΩ (min)
Power Factor:1
Operating Temperature:0°C to 49°C
Humidity (Non-condensing): 0 to 93 % RH
Dimensions (HxWxD): 129mm x 180mm x 60mm
Weight: 0.28kg
Ingress Protection:IP65
Compatibility:Suitable for use with Eaton UL fire systems


TEL: 254-774-211313

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