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It is the Simplex 565-247 power supply interface board mounted on the Simplex 636-341 power supply
where the individual address of each module is select using the built-in rotary switch
FSP-951 series detectors are available for both FlashScan® and CLIP applications as designated
— B224RB Intelligent Relay Base
For prevention of condensation
Simplex 2190-9161 Signal Zone Adapter Module sIgA It is the Simplex 565-247The Simplex 2190 9161 Signal Zone Adapter Module, Style Y (surface cover) provides addressable interface to conventional zoned circuits. Signal ZAMs supervise and operate 24 VDC notification appliances, speakers, and telephone circuits. Output capacity is up to 2 A @ 24 VDC, or 50 W of 25 VRMS speakers, or up to three simultaneously activated firefighter phones. The signal ZAM is available for either Style Y Class B or Style Z Class A operation for