I.R.I.S. 808 Digital Video Recorder - Manual (Page 27)

 GPS modem
Connect the RS-232 connector to GPS modem via the appropriate cable. The
system supports the GPS modems with NMEA0183 protocol. Please make sure
to setup the RS-232 port (
Section 6.9 ) accordingly.
 Car Speed Pulse Signal
Connect the Car Speed Pulse connector to the car speed pulse signal of the
vehicle. Please make sure to setup the Car Speed (
Section 6.11.1 ) and Speed
Alarm ( Section 6.11.3 ) accordingly.
 Delay ON Connection
Connect the Delay ON connector to the other devices that need to start operating
after the DVR has started operating. The maximum total current for the delay
on devices is 30 amperes. The connection diagram is as shown below.
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