C-TEC CAST Input Output Module, LPCB certified to EN54-17 & 18 and Kiwa Telefication certified to EN54-13, Can be configured to monitor any combination of: • Up to 20 conventional detectors & 10 MCPs • Any normally open switch with an EOL resistor fitted • A simple normally open or closed switch (non-fault monitored), 6mA typical alarm current @ 22-40V DC.