DIN rail mounted galvanic isolators and zener barriers for use with both the IS28 sounder and the IS FlashDome beacon are available from Vimpex.
The LF-LI-6190 Short-Circuit Isolator provides short circuit protection on addressable device circuits. When a short is detected by the LF-LI-6190, it isolates the affected segment of the circuit, allowing the remaining devices to continue operation.