Page 11
User Manual
DTL-960e Single Colour Channel Digital Video Recorder
REAR PANEL CONNECTIONS
Accessories I/O Port
The rear panel of the unit is equipped with an Accessories Port (DB-9 style connector). It is used for connecting peripheral
devices such as alarm devices, alarm relays, or the VEXT connection.
Wire all accessories to the Accessories PCB (supplied with the unit), and connect it to the Accessories Port.
Do not attempt to wire accessories directly to the DB-9 connector.
Alarm In
An alarm condition can be activated by an Active Low TTL input or by relay contact devices such as pressure pads, passive
infrareds, door switches, or other similar devices.
min. duration: 0.5 sec.
Input
High
Low
: Active Low TTL with pull-ups or Normally Open relay
: 5V (12V max.)
: Ground
ACCESSORIES PCB
TYPICAL ALARM DEVICE
Pin 1
Pin 7 or 10
Alarm Input
Ground
Volt-free
Normally open
(closes upon alarm)
Figure 7 - A Normally Open Relay Alarm Condition
Alarm Out
The Alarm output is activated when a teletext alarm is read, or while the Alarm Input is active. The Alarm output is only
active for the duration of the alarm event.
Low for duration of alarm
Input
High
Low
Current out
: Active Low
: 12V
: Ground
: 50mA max. (short circuit protected)
Figure 6 - Pin Configuration for Accessories PCB
1
2
3
4
5
6
7
8
9
GN
D
Pin
Use
1
Alarm In
2
Alarm Out
3
Record Start In
4
Alarm Record Reset
5
VEXT Pulse Out
6
Error Out
7
Ground
8
Videoloss Out
9
Disk End Out
10
Ground
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