User manual

Installation
20
Siemens Building Technologies
Fire Safety & Security Products 01.2009
7.7 Connecting to the RS485 port
Fig. 9 RS485 connector
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.
Connect RX-/TX- and RX+/TX+ of the control system to the – and + (respectively)
of the DVR. See the Section 8: Configuration and the PTZ camera or remote
keybo
ard manual for configuring the RS485 connection.
7.8 Factory reset
Fig. 10 Factory reset switch
The DVR has a factory reset switch to the left of the Network port on the rear
panel. This switch will only be used on the rare occasions that you want to return
all the settings to the original factory settings.
NOTE
When using the Factory Reset, you will lose any settings you have saved.
To reset the unit, you will need a straightened paperclip:
1. Turn the DVR off.
2. Poke the straightened paperclip to the unlabeled hole in the left of the
Network port, and turn the DVR on.
3. Hold the reset switch until the DVR turns on and live monitoring screen
appears.
4. Release the reset switch.
Î All of the DVR’s settings are now at the original settings it had when it left the
factory.