Spektron-535-Exd-A-UDP-01 "Fire extinguishing start" (body color yellow)

Subtitle: Explosion-proof remote starter Function: Manual fire detector Brief description: starter, 1Ex db IIC T6 Gb / Ex tb IIIC T85°C Db; "START EXTINGUISHING"; 2-wire connection scheme; U-pit.9...28V, I-dej. 0.05 mA, I-fire