WISE Application in a Linked Fire Alarm System

PACTECH / ICP DAS (Vol. EC01_2016, By Alan Jhu)

For decades, fire warning alarm systems have proved to be very important in saving lives and property from fires that happen all the time. Do you know the difference between a traditional alarm system and a linked fire alarm system from ICP DAS?

If a fire is detected, the traditional fire alarm system will send an alarm to the control center to notifying them where the fire has occurred. However, any occupants near the scene of the fire will not receive a notification, so they have no idea of the exact location of the fire. It can be said that they might not have enough information to identify the best escape route or to make the best decision regarding protecting their lives and property.
In contrast, the advanced P2P functions of the WISE modules from ICP DAS can be used to build an intelligent linked fire alarm system to provide better solutions for fire alarm applications.

Description:

Assume that there is a requirement to install a linked fire alarm system in a building which is divided into six areas, as depicted in the image above. What we can do is install a WISE-7152 module in each area, and connect the DI channels on each module to the temperature or smoke sensors and the emergency switches so as to detect a fire if it occurs. The DO channels on the WISE-7152 modules are connected to six warning lights, one warning light for each region.

Looking at the image above, when a fire is detected in Region F, the WISE-7152 module in Region F transmit an alarm via its advanced P2P function. All warning lights and alarms represented in Region F on the six WISE-7152 modules distributed in the six regions will be turned on to indicate that a fire is occurring in Region F. Knowing the exact location of the fire can help to guide personnel in an accurate direction toward the exits. After the problem in Region F has been solved, you just need to press the emergency switch to turn off the alarm. The alarm and warning lights on all WISE-7152 modules will be turned off at the same time.

In addition to the six WISE-7152 modules distributed in the various regions, an additional WISE-7152 module could be installed as a coordinator to monitor the network status of the other modules. Through the ability to transmit information via the embedded advanced P2P function, this coordinator will regularly communicate with the other modules, and the light indicators for the six DO channels on the coordinator will signify the network status of the six modules. The operator can easily verify the network status of each module in this linked fire alarm system based on these indicators and quickly identify which module has no response when the coordinator sends message and then repair it.

Device Introduction:

WISE-7152, the Intelligent WISE I/O Module

The WISE-7152 module is based on the IEEE 802.3af-compliant (classification, Class 1) Power over Ethernet (PoE) specification, which allows power to be received from a PoE-enabled network using Ethernet pairs (Category 5 Ethernet cable). This feature provides greater flexibility and a higher efficiency, therefore simplifying system design, saving space, reducing the number of cables, and eliminating the requirement for dedicated electrical outlets. At the same time, the WISE-7152 module will still be able to receive power from auxiliary power sources such as AC adapters or batteries, etc., in situations where it is operating in a non-PoE environment.

The WISE-7152 module supports the Modbus/TCP protocol to enable seamless integration with SCADA software. The module features 8-channel isolated open collector output and 8-channel isolated wet contact digital inputs. Each Digital Output channel supports 650mA current driving +10 to +40 VDC, and each Digital Input channel supports counter input.

Benefits:

• You can implement logic settings in the system without programming requirements.
• You can immediately create a fire alarm system, which sharply reduces the time and labor spent on system development.
• You can reduce wiring costs by using the Ethernet as the communication network for the entire system, together with the supported PoE feature.
• By using the advanced P2P function, multiple WISE modules can share information via the network in real-time and respond immediately.
• The operating status of the whole system is displayed via the indicators, making it easy to perform maintenance without the need for a complex SCADA system.

For more product information about the WISE series, click the link following: https://www.icpdas.com/en/product/WISE-7152.

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