Connecting to the RS232 port
Connecting to the UltraWide SCSI port
Siemens Building Technologies
Fire Safety & Security Products
An RS232 port is provided to connect an external modem for remote monitoring,
configuration and software upgrades, and to connect a remote control keyboard.
Use a modem cable with a DB-9S (female) connector to connect to the DVR. See
Section 8: Configuration for configuring the modem.
The DVR is not supplied with a modem cable, and many modems are not supplied with cables. Make
certain you have the correct cable when purchasing the modem.
A SCSI port is provided to connect external storage devices for recording or
archiving video. Connect the external SCSI hard disk drive (RAID) cable to the
high-density 68-pin female UltraWide SCSI port. The length of SCSI cable should
not exceed1.5 meters (5 feet). You can connect up to 8 UltraWide SCSI devices
with SCSI IDs set from 0 to 15 except for 7, which is assigned as the Host ID.
The SCSI bus must be terminated, otherwise the DVR will not operate properly.
Do not connect or disconnect SCSI devices while the DVR power is on. The DVR must be powered
down to connect or disconnect SCSI devices. Power up SCSI devices so they are ready for operation
before powering up the DVR. Power down SCSI devices after powering down the DVR and then
disconnect SCSI devices.
If the SCSI device is shut down while the device is operating, the DVR system might not operate