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Multiple Domes means that more than one fast dome is linked in the system. Each dome connects
to next dome forming a serial linking. Each dome has an individual ID dip switch, which allows the
keyboard to identify each fast dome and make command. Sometimes it is more convenient to wire
a telemetry system in star configuration rather than daisy chain. To do this a PIH-804
data
distributor is necessary. It takes an output from a keyboard or a matrix and splits the single data line
into 4 separate data lines. One keyboard can control up to 64 camera.
RS-485 Connection Between PIH-804
Data Distributor and Fast Dome
RS-485 Connection Between PIH-804
Data Distributor and Keyboard
1st output TXDI1+ of PIH-804
connects to TXDI+ of 1st fast dome and TXDI1- of PIH-804
to
TXDI-of 1st fast dome.
Linking 2nd Fast Dome
TXDO+ of 1st fast dome connects to TXDI+ of 2nd dome and TXDO- of 1st dome to TXDI- of 2nd
dome.
1st pin TXDI+ on RS-485 IN jack of keyboard connects to TXDO+ on RS-485 OUT jack of
PIH-804
2nd pin TXDI- on RS-485 IN jack of keyboard connects to TXDO- on RS-485 OUT jack of
PIH-804