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14 Pelco Manual C554M-A (5/98)
3.3.1 Receiver Control Output for 12 VDC Camera Option
The usual output for camera power is 24 VAC, accessed at pins 9 and 14 of the 37-
pin AMP connector (see Table C) where camera AC (high) and camera AC (low)
emerge as camera input power.
The output pin assignments remain the same for 12 VDC camera power options.
However, pin 9 is positive (+) and pin 14 is negative (-).
3.4 COAXITRON
®
RECEIVER PRESETS
The Coaxitron
®
system uses precision linear taper potentiometers as position feed-
back sensors. This feedback voltage is digitized and stored in the receiver. Preset
storage is in a nonvolatile EEPROM. This assures the preset information is stored
for future use.
Up to 32 presets can be stored in each receiver. Up to eight presets can be acti-
vated by alarm contacts connected to the receiver. There is also an open collector
output from the receiver to activate an external device when the alarm contacts are
activated. Figure 3 shows the wiring for alarmed presets.
If multiple alarms are activated, the receiver will sequence between the alarm pre-
sets at a 5-second dwell time per preset.
Refer to Figure 3 and Tables B, C, and D when assembling pin-to-pin wiring con-
nections from preset domes, pan/tilts and lenses to the Coaxitron
®
receiver.
NOTE:
The Coaxitron
®
receiver with
preset positions is designed for use
with preset capable Coaxitron
®
controllers only.
Figure 3. Wiring Diagram for Pre-position Alarm Outputs
17
18
19
20
21
22
23
24
25
26
ALARM INPUT 1
ALARM INPUT 2
ALARM INPUT 3
ALARM INPUT 4
ALARM INPUT 5
ALARM INPUT 6
ALARM INPUT 7
ALARM INPUT 8
ALARM OUTPUT
ALARM COMMON
COAXITRON
®
RECEIVER
37-PIN CONNECTOR
NOTE: ALARM OUTPUT MUST RETURN TO THE EXTERNAL DEVICE
FOR THE ALARM CONDITION TO BE SWITCHED TO THE
MONITOR 1 OUTPUT OF THE MATRIX
ALARM CONTACTS NORMALLY OPEN
PRESET POSITION ALARM ACTIVATION
ALARM CONDITION OPEN
COLLECTOR OUTPUT BACK TO
EXTERNAL DEVICE ALARM INPUT
ALARM COMMON BACK TO
EXTERNAL DEVICE
ALARM INPUTS ACTIVATE THE FIRST EIGHT PRESET POSITIONS
EXAMPLE: ALARM INPUT 2 ACTIVATES PRESET POSITION 2