Description
The GSA-IM2 isolator module is part of Kidde's Signature Series system. This intelligent device allows part of the Signature data loop to continue to operate in the event of a short circuit. The module can be connected to a Class A data loop at any point.
If a fault occurs, the isolator cuts power to all devices beyond the isolator on the circuit as follows:
- A short circuit on the line causes all insulators to open within 23 ms.
- At 10 ms intervals, starting on one side of the Class A circuit closest to the loop controller, the isolators close to provide power to the next isolator in the line.
- When the insulator next to the short closes, it reopens within 10 ms.
Once activated, the line fault isolator continuously checks the faulted side of the circuit to determine if the short circuit still exists. When the fault is corrected and the system is reset, the module automatically restores the entire data loop to normal condition.
The microprocessor in each Signature module provides at least three important benefits: self-diagnostics and historical logging, automatic device mapping, and fast, stable communication.
Self-diagnosis and historical record: Each Signature Series module constantly runs self-tests to provide important maintenance information. This information is automatically updated and permanently stored in the module's non-volatile memory and can be accessed for review at any time using the Signature Series program/service tool KI-HDT.
Automatic device mapping: The Signature Loop Controller learns and maintains a map of where each device's serial number address is installed relative to other devices on the data circuit.
Fast and stable communication: Built-in intelligence means that less information needs to be sent between the module and the loop controller. Apart from the regular response to the monitoring poll, the module only needs to communicate with the loop controller when it has something new to report.
