WWW.CHIPKIN.COM © 2017 CHIPKIN AUTOMATION SYSTEMS Case Study: RS232 Splitting – Hot Standby – Fire System Monitoring Application Monitor Fire Alarm System events to the Building Automation System for remote monitoring and other applications. Customer requires hot standby system. Problem With Poll-Response protocols there can only be one master active at a time - the Hot Standby system need to support this feature. In addition, there is only one serial port on the FACP so the port needs to be shared by the multiple master devices. Solution Two gateways are configured and installed in Hot Standby Mode. In this mode one gateway is active and the other is passive. The passive gateway monitors the active one. If the secondary sees that the active unit

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