SmartNet 100 Fire Alarm Interface Unit

Summary

The In fire alarm interface interfaces with Cygnus devices and other fire systems, sensors, detectors and switched power, having two configurable inputs and two outputs.

The Cygnus SmartNet wireless fire detection and alarm system is a network of battery powered, wireless fire detection and alarm products suitable for permanent installations, commercial premises and HMOs.

IO Functions (for EN 54-18:2005)

Inputs

• Radio messaging from other devices
• Lid tamper switch
• Two digital inputs (see below)

Note : Inputs must not be supplied with a voltage. Points ‘A’ and ‘B’ must be shorted together to activate the inputs.
Inputs are fault monitored and a fault will appear if the termination resistors are not fitted. Please connect as shown in the diagram below. If an input is unused, please fit a 4.7 k

Outputs

• Radio messaging to other devices
• Two digital outputs (see below)

Note : Outputs must be supplied with external power to the relay contacts (no power is available from the batteries fitted to this device).
Outputs are operated from the control panel and configured using the CygnusConfig application.

Two digital inputs : Short together for activation (termination resistors required)

Two outputs : NO, COM, NC dry contacts

Contacts Current Rating : 2A @ 30V DC max.

Contacts Power Rating : 60W max.

Note : All Inputs and Outputs operate independently

Output Wiring Connection

• NC : Normally Closed Relay Contact
• COM : Common Relay Contact
• NO : Normally Open Relay Contact

Input Wiring Connection

• 4.7 kΩ resistor : This is an end-of-line termination resistor, so must be connected to the furthest point of the wiring. 4.7 kΩ is also 4,700Ω . 
• 470 Ω resistor : This is a series resistor which must be connected in series with a switch or relay contacts.

• ‘+’ : High-side input (do not apply a voltage to this terminal)
• ‘- ‘ : Low-side input (do not apply a voltage to this terminal)

Input States

• Open contact (A and B) : Input inactive
• Closed contact (A and B connected / switch closed) : Input activated
• Open circuit state : No resistance present (4.7 k resistor missing or wire cut)
• Short circuit state : Plus and minus terminals shorted together

Why choose SmartNew 100

• Reliable wireless mesh radio technology
• Completely wireless – no cables required
• Sensitive radio with up to 350m range
• 868MHz radio (915MHz also available)
• 3+ year battery life
• Designed to be EN 54 compliant
• Certified by Intertek
• Easy configuration via the Windows based CygnusConfig application
• Compatible with other Cygnus SmartNet devices