
1BChapter 2: Installation
TruVision NVR 50 User Manual 5
Figure 1: Back panel connections
1. Connect one CCTV monitor (BNC-type
connectors): Main monitor.
2. Connect one audio input to RCA
connectors.
3. Connect to a RS-232 device.
4. Connect to a network.
5. Connect to an optional eSATA device such
as SATA HDD, CD/DVD-RM.
6. Connect to a power cord.
7. Connect to speakers for audio output.
8. Connect to a VGA monitor.
9. Connect to an HDTV. The HDMI
connection supports both digital audio and
video.
10. Connect to an optional USB device such as
a mouse, CD/DVD burner or HDD.
11. Terminate the line to the dome cameras
using this RS-485 switch. Default is Off.
12. Connect to a PTZ control.
13. Connect to a keyboard (KTD-405 shown).
14. Connect up to 16 alarm input cables to
relay outputs.
15. Connect up to four alarm relay outputs.
Wiring the keypad
The keypad uses RS-485 simplex wiring. The signal is transferred by a single
twisted pair line. A shielded STP CAT5 network cable is recommended. Ground
one end of the cable, either the first or last device on the RS-485 line.
The maximum number of devices that can be installed in one bus is 255, with a
maximum cable length of 1200 m. The cable length can be expanded using a
signal distributor.
Both the first and the last device in series should be terminated with 120 Ohm
resistance to minimize line reflections. See Figure 2 below.
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