The KB1 external keyboard is used for controlling of up to 240 devices in a
range 1000 m. All devices are connected by CAN bus (shielded twisted pair cable). KB1
keyboard can control PAN/TILT units, zoom lenses and multiplexers. Keyboard sends commands
with the controlled device address (e.g. TC) that receives the commands and executes it
(e.g. switches on rotator turning). There is no difference between operating a multiplexer
with the external keyboard and the multiplexer local keyboard. KB1 external keyboard light
indicators show the state of the controlled device. The sound signalling is also
transferred to the keyboard.
Every device connected to the bus must have its own unique address in a
range 1-240. KB1 keyboard has pre-installed address 10. Entering the device address is
necessary for its use. After switching on KB1 has set address of the last used device.
The CAN Bus
All telemetry devices (TC telemetry receivers, TP multiplexers, KB1 external
keyboard) are connected using the CAN bus that consists of shielded twisted pair cable and
its transfer speed is 50 kBd. Maximum length of the bus is 1000m. Maximum length of one
stub is 60m and length of all stubs must not exceed 300m. The terminators 120 W are
required at the both ends of the bus. All devices must be connected to CAN bus by the
4-pins MINI DIN connector.
Possible Use of KB1
You can control a PAN/TILT units and a lenses of up to 240 cameras by the
KB1. You can also control telemetry systems of several cameras by the KB1 using one or
several (TPxx) multiplexers that are connected in net. The KB1 controls the multiplexers
network by a subsidiary video switcher VPxx. You can use a multiplexer sequential channel
of instead of the subsidiary video switcher.