The DVR can be controlled remotely by an external device or control system, such as a control keyboard,
using RS485 half-duplex serial communications signals. The RS485 connector can also be used to
control PTZ (pan, tilt, zoom) cameras. Each connector may be connected to individual devices for
simultaneous operation. Connect
RX-/TX-
and
RX+/ TX+
of the control system to the
−
and
+
(respectively) of the DVR. See
Chapter 3 — Configuration
and the PTZ camera or remote controller
manufacture’s manual for configuring the RS485 connection.
Connecting to the RS232 Port
Figure 13 — RS232 connector.
An RS232 port is provided to connect a remote control keyboard or a text-in device.
Connecting to the USB Ports
Figure 14 — Front USB connectors.
Figure 15 — Rear USB connector.
Three USB ports are provided to connect external hard disk, CD-RW or flash drives for video clip
copying or system upgrades. One USB port is on the rear panel and the other two are on the front panel.
Position external drives close enough to the DVR so that you can make the cable connections, usually less
than 6 feet. Use the USB cable provided with the hard disk drive to connect it to the DVR.
A USB mouse (not supplied) can be connected to one of the ports. You can use the mouse to navigate
through the screens and menus much like you would on a computer.
A PostScript™ USB printer (not supplied) can be connected to one of the ports. You can print selected
images resulting from a search. Refer to
Chapter 4 — Operation, Searching Video.
A USB to Serial converter can be connected to the USB port. Multiple text-in devices can be used with a
USB to Serial converter.