Connecting External Devices; Connecting Storage Devices; Connecting To Alarms & Relays - Dedicated Micros D4 Guía De Programación

Connecting External Devices

D4 uses 485-Bus networking to interconnect Dedicated Micros products and
accessories. Storage devices can be connected to the SCSI port.
Devices that can be connected to D4 include:
Storage devices
Alarms and relays
Audio devices
Ethernet networks
Dial-up modems
If you do not require any of the above devices to be connected to D4, move on to
'Configuring D4' - Page 9.

Connecting storage devices

Images are recorded to the internal hard disk for instant playback and searching
by the operator. The capacity of the internal disk affects the amount of images
and time that can be recorded. For example, a D4 with a 40GB hard disk can
record for 8 days at a 24-hour time-lapse mode using a 160GB hard disk allows
one month of recording.
The internal hard disk is a temporary storage device as the images are constantly
being overwritten after a certain period of time. If images need to be kept for
longer then external storage is required. The 50-way high density SCSI-2 port on
the rear of the D4 is used to connect to external storage.
Images can be copied from the internal hard disk onto CDR disks for long term
storage. CD's are ideal for recording relatively small amounts of images such as
events, video clips, or incidents. These images can be played back on any PC with
a CD drive and DM Playback software installed.
6
The table below shows the recording times at typical recording rates (at S-VHS
image quality, 18KB):
1PPS 2PPS
CD-R 640MB 9h 46m 4h 49m
Connecting Alarms and Relays
Dry contact alarms can be wired directly to the alarm connection on the back on
the D4. There are 5 alarm inputs, one for each camera, and a global alarm input.
The alarm connections are as follows:
(View from plug solder side)
The polarity of the alarms - normally open or
normally closed, can be set in the 'Camera
setup' menu.
The global alarm input is used to set or unset the schedule function.
An alarm trigger performs the following actions:
Set
Close relay 1.
Display the alarm camera on the main monitor.
Interleave record the alarm camera.
3PPS 6PPS 12PPS 25PPS
3h 12m 1h 36m 48m 23m
Times indicate all cameras being copied to the CD.
PIN Connection
9 Global alarm
10 Alarm 1
11 Alarm 2
12 Alarm 3
13 Alarm 4
14 GND
Unset
Open relay 1 after 2 seconds.
Resume pre-alarm display after 2 seconds.
Standard record after 2 seconds.