2 INSTALLATION Fully expanded system KA-1MRD one camera and one monitor system can be expanded with MK-1SD/B audio only handset, with both capable of answering and releasing the door. Call extension speaker IER-2 can be attached to each room station. max. max. 100m (330') 100m (330') KA-1MRD KA-DAR MK-1SD/B 2 5 2 2 2 PT EL-9S Auxiliary light IER-2 2 IER-2 Relay Light switch PS24 : PS-2410A,24V DC, 1A PT : AC transformer PT-1210N in US Relay : MAW-B relay PS-2410A AC Wiring 1.