Allmand Brothers MB 6200 - Manual (Page 14)

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Single-Board Computer (SBC)
A single-board computer (SBC) controls the operation of the sign. It provides both power and communica-
tions input to the sign. The SBC is a module that attaches to the rail assembly in the same way as the
BRICKs.
The SBC:
1. Provides necessary non-volatile memory for storing up to 99 sequences.
2. Uses a built-in photocell that controls the brightness the LEDs output of the BRICKs. The brightness of
the BRICKs is regulated from 1% to 100% in 20 steps.
3. Controls the message display when the sign is turned on in one of the following modes:
•
Sign turns on blank.
•
Sign resumes the previously stored sequence.
Jumper BRICK
For multiple-row signs, the jumper BRICK transfers 12V dc power and communications data between
rows of BRICKs. The jumper BRICK attaches to the rail assembly in the same way as the BRICKs.
Trim BRICK
The trim BRICK neatly finishes a sign’s appearance. This BRICK attaches to the rail assembly in the same
way as the BRICKs.
User Interface Device
• Hand-Held Terminal (HHT): An HHT is used for on-site communications. The unit has 30 alphanu-
meric membrane keys and a 4-line by 20-character backlit, liquid crystal display (LCD). Each HHT has
15 feet (38 cm) of coiled communications cable that plugs into the SBC via the on/off switch. When
connected to the SBC, the HHT is used to select sequences from the stored library in the SBC to display
on the sign.
• Desktop or Notebook Computer (BaseStation): The computer provides the same functions as the
hand-held terminal. Creates, stores, and runs graphics via a Windows based interface.