The RCF BM 3804 is a monitored and pre-ampified desktop paging microphone for use with the RCF DXT 3000 emergency evacuation system. Fully compliant with EN-54.

It can be directly connected to the MX 3250 main unit through a fourpair J-type fire-rated cable.

The BM 3804 front panel includes the following buttons:

• Two for zone selection (first and second only)  (see the BE 3806 to extend capacity to 6 zones)
• PTT (‘Push To Talk’)
• GEN CALL (general call)
• CHIME (on / off)
• EVAC message selection
• ALERT message selection, this button also allows to mute the buzzer (when a fault is detected)
• A protected bistable emergency button (with red light) to start playing the evacuation / alert message in all zones.

Up to four BM 3804 paging microphones (interlocked with one another) can be linked (daisy-chained) to the line.

The first BM 3804 paging microphone of the line is directly powered by the MX 3250 main unit, while the second, the third and the fourth need 24 V dc adapters (500 mA, i.e. RCF AC AD 2405, available separately).

• Casing in die-cast metal
• Preamplified cardioid hi-quality microphone, with flexible 445 mm long gooseneck
• Comprehensive self-diagnostics (EN 54-16)
• Connection cable included (5 m, with RJ 45)