24V DC, supplied by PS-2420UL. KB-3MRD: 860mA. 220mA standby. KB-3HRD: 410mA. 80mA standby. KB-3SD: 85mA. 50mA standby. Use one PS-2420UL for every two monitors in the system.
Video Monitor
4" TFT color LCD
Call-in from Door
4-stroke chime from door #1, 2-stroke chime from door #2, fast 8-stroke chime from door #3 (audio/video or audio-only)
Internal Calling
Pretone then voice when making an All Call to inside stations. Double pretone then voice when selectively calling an inside station. Hands free reply from responding station.
Night Viewing
Built-in light is projected up to 12" from camera. Outside area beyond 12" cannot be seen.
Door Release
Contact rating: 12V AC, 400mA. (Single door release contact) Selective door release with RY-3DL adaptor
Wiring
2 wires to door station, parallel, non-polarized, fire-rated. (Use Aiphone 871802, West Penn D990 or Atlas 202-18-1-2J wire only.) 2 wires between rooms, looped, plus a separately jacketed 2 conductor wire from power supply to each monitor, homerun. (Use West Penn D990 wire for video signal, plus separate 2 conductor wire for power to each monitor in the system.)
Distance
KB-3MRD to door: 650' with 18AWG. KB-3MRD to IE/IF Door: 450' with 22AWG wire, 1,000' with 18AWG. KB-3MRD to last KB-3HRD: 330' with 18AWG, Use West Penn D990 or Atlas 202-18-1-2J wire. Daisy-chain wire between monitors, and homerun additional separate pairs from power supplies to each monitor (2 monitors per PS-2420UL). With common power wires: Max. distance between monitors is 165' with 18AWG.
