Videoswitch Vi-K3 - Manual (Page 9)

Vi-K2/Vi-K3 Universal
Keyboard
Vi-K2 Universal Keyboard User Manual
7
1.1.4 Dome Control from Vi-K2/Vi-K3
Up to 16 domes may be directly connected to the Vi-K2/Vi-K3. The appropriate protocol(s) must be set in the
Vi-K2/Vi-K3. Dome control may be via RS485, RS232 or 20mA loop.
• The Vi-K2/Vi-K3 has two dome outputs “DOMES1” and “DOMES-2”.
• A particular Vi-K2/Vi-K3 can be connected to a maximum of two different types of dome; all of one
type must be connected to the “
DOMES-1” output, and all of the other type of dome must be
connected to the “
DOMES-2” output.
• Each camera (up to 256) must be assigned to use one or other of these outputs (the factory default
assigns all cameras assigned to “
DOMES-1” output).
• Each of the two dome outputs is assigned a dome protocol.
• The domes may be either daisy-chained. In this case, turn the termination off on all domes except
the last in the daisy chain, which should have its termination set on.
• The dome may be connected in “star” mode by means of a RS485 “star expander” (our product
code “VX Hub”). In this case, all domes should have their termination on.
• Each dome must be set up with an address that corresponds with the camera input to which it is
connected (i.e. addresses 1, 2, 3 etc for domes on camera inputs 1, 2, 3 etc)
1.1.5 Dome Control from DVR
If the DVR, or multiple DVRs, have dome control built in, the domes may be connected to the DVR(s) and
the Vi-K2/Vi-K3 used as slave to control everything. The Vi-K2/Vi-K3 protocol must be set to SLAVE (i.e.
number 1). Up to 16 Vi-series DVRs may be linked to provide control of up to 256 dome cameras. Dome
control may be via RS485, RS232, 20mA loop or “up-the-coax” as supported by the DVR(s).