record rate changes to the preset alarm rate (see Section
3.4, page 14).
NB:
unit has to be in record mode.
2
In Alarm-stop
This pin has two functions:
1) If not in alarm mode, Record stop.
2) In alarm mode with “Start/ Stop” selected, contact to
ground cancels the alarm (see Section 3.4, page 14).
3
In Record
(was called
Snapshot)
Record when connected to ground. When opened, the unit
either stops or enters “Record pause” as set in the “Set
System Options” menu Section 3.7, page 18.
4
In Time-in
External synchronisation of the AfterBurner clock. Active
low. See section 3.8, page 19.
5
In
Chain-in (record
start)
On contact to ground, the unit starts recording. Can be
used to with the “Chain out”, pin 12, of another
AfterBurner.
NB:
only operates if AfterBurner is not in stand-by.
6
In Wake-up
Switches unit on (from stand-by) when connected to
ground. Can be used in conjunction with other control pins
(see examples in Section 4.3 below).
7
-
Ground Ground
8
Out Recording-ok Recording ok. Active low, open collector output as
Figure
6
below.
9
Out Disk-full
Disk full alarm. Active low when the internal hard disk is
full. (Only active with “stop when full” disk option is set –
see Section 3.1), open collector output as
Figure 6
10 Out Alarm-out
Low when alarm active, output as
Figure 6
.
11 Out Time-out
Can be used to synchronise the clocks of a two or more
AfterBurners. Contact Ovation for more information.
12 Out Chain-out
Asserted when disk is 5 MB from being full. Can be used
to start a second AfterBurner recording when connected
its “Chain In” input.
13 Out Fault
Active low, open collector output as
Figure 6
.
14 - DC
Out
DC Output used to power external devices such as
cameras. This voltage is the same as the DC Power input
to the unit. Max current draw is 500mA. Pin 7 is the
corresponding Ground
4k7
4k7
+5V
+12V
TTL
Output
Driving
an LED.
Driving
a Relay.
7
7
7
14
Pin 8,9,10
12 or13
Pin 8,9,10
12 or13
Pin 8,9,10
12 or13
6 to 24V
Figure 6: AfterBurner I/O Control Output Interface
