The charcoal with silver PLN-6TMW Plena Weekly Timer from Bosch is an accurate timer for use in public address systems. It is suitable for schools, shopping malls, and all other venues that need regularly timed messages, signals, or other controls. It can be connected to the Plena Message Manager and Voice Alarm System.
The unit has 2 weekly schedules as well as a pause mode, where all actions except the clock display are suspended. Events can be programmed with an accuracy of 1 minute. There is no limit to the number of events; every minute may have an event associated with it. Each day can have a separate event set, and 2 schedules can be programmed. The schedule can be selected via the front panel. Each event can trigger a chime, any combination of output contacts, and BGM volume change.
The timer can broadcast 14 different chimes via the audio throughput. It has 6 programmable output contacts with relays to connect to other equipment. Programmed contact events can open or close the contact or generate a pulse of a configurable duration. The contacts can also be controlled via buttons on the front panel.
The unit has an audio input and output to attenuate BGM signals. The volume can be controlled directly from the front panel, or programmed to change level at fixed times. It can automatically revert to the programmed level at the next event. The timer has a clock sync input to synchronize the time with an external source but can also take the correct time from a PC. This way it can synchronize with a time server.
The timer clock also keeps track of the date, ensuring correct weekday display and automatic daylight / standard time setting. (According to European, North American, user defined dates or off). The timer has a 24 V backup power input with reverse-polarity protection as well as a back up battery that preserves the correct clock setting.
Synchronization and programming is done via the USB port. Programming can also be performed via the front panel. An RS-232 connector is available to connect to a large separate display.