70627700. The Dormakaba SVP6277 is a microswitch-monitored emergency-escape lock with automatic locking action, suitable for non rebated single leaf timber doors. It is electrically monitored, with split follower, optimised mechanical sequential control and status monitoring. The unit is Certifire approved and CE marked.. To suit non rebated single leaf timber doors. Steel bolt projection 20mm. Max load current 30 VDC, 100mA. Status monitoring