3
2. Keyboard Connection
2.1 Keyboard Interface Instruction
There is inter face on the back of the key boa rd, which equipped with kinds of
communication interfaces: RS422
、
RS485
、
RJ 45,which can connect and control kinds of
peripheral equipment.
2.1.1 RS42 2 and RS485 interface
RS422 and RS485 interface are on the 6bit ribbon cable connection of the
keyboard .RS485 (A + B-) can connect with the dome when the key -board controls the dome
directly ;RS485
（
A+
，
B-
）
can connect with DVR or other keyboard when the keyboard controls
the dome by matrix ; RS 422 ( T
＋
,T
－
) is s ending the signal ,RS422(R
＋
,R
－
)is receiving the
signal , both of which can connect with matrix, DVR and son.
Picture2-1.1
2.1.2 RJ45 Interface
It is the standard net work interface which can be mainly used for connecting with the
matrix for short distance (the distance is less than 7.6m). About the details, Please see to “2.3
matrix connection”.
Содержание RS485
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Страница 5: ...2 Relative humidity Less than 90 Physical property L W H 218 180 55 mm Weight 630g Net Weight...
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