OpenEye CA-501J PTZ - Manual (Page 18)

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REAR PANEL
RS-232 Used to connect to an OpenEye DVR.
Termination Switch
Used to terminate the connected RS-485 communication line - should be set in the OFF
position normally if at the end of the communication chain. The default position is OFF.
Mode Switch
Used to set the keyboard in SLAVE or MASTER position. The default position is MASTER
but any additional keyboards should be designated SLAVE.
Line Selection
Switch
Used to select full-duplex (4-lines) or half-duplex (2-lines) for the communication lines. The
default is 2-lines.
NOTE: The 4-line mode is not currently available.
RJ-11 Jack
Used as a quick connection jack for demonstration purposes. It only supports half-duplex
communication.
Termination Blocks
Used to connect RS-485 communication lines.
NOTE: Do not power the keyboard through this connector.
Power Jack Used to power the keyboard (DC 12V).
RS-232
TERM MODE LINE
ON OFF S M 2 4 RJ-11
2 LINES
RS-485
+ -
DC 12V 2 LINES 4 LINES DC 12V