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2 Pelco Manual C521M (6/95)
2.0 SCOPE
The information contained within this manual covers
the AZL (Azmith and Elevation Read-Out Meter).
3.0 DESCRIPTION
The AZL is used to provide a visual read-out (in de-
grees) of the mechanical position of DC based pan/tilts
such as Pelco's P/T1250DC/PP equipped with position
feedback pots.
The AZL consists of two easily read Simpson meters
mounted on the front panel of the unit along with the
power switch and power on indicator.
The fourteen pin CPC connector on the back panel of
the unit provides the necessary wiring interface for the
unit. This wiring interface is usually integrated with
controller wiring at the point where the cabling con-
nection is made to the P/T (reference Figure 1's simpli-
fied diagram). The rest of the back panel consists of
installation set-up pots for initial meter calibration. A
power input cord, input line fuse and a convenient power
outlet plug round out the back-panel connections.
4.0 INSTALLATION
Installation consists of installing the interconnecting
cable between the AZL and the P/T in use and initial
adjustment of the meters for operation.
4.1 CONNECTOR INSTALLATION
Reference Figure 2 and Figure 3. Before connecting
the wiring, set the meter module “full scale” adjust-
ment pots (these are the 5K pots) on the back of the
AZL unit at the full CW (clockwise) position and set
the “center scale” adjustment potentiometers (these are
the 1K pots) on the back of the AZL unit at approxi-
mately center.
Now, reference the AZL wiring diagram in Figure 2.
The wiring for connector pins 2 and 9 go to the “pan
feedback” and “tilt feedback lines”, respectively, on the
P/T, which, in the case of a PT1250DC/PP, share corre-
sponding numbered pinouts. For the rest of the AZL
wiring, we have pin 10 - which is AZL common - that
is wired to feedback common (pin 10) on the P/T and
pin 11 (AZL B
+
, +5VDC) that is wired to “feedback
B
+
” on the P/T. We assume, of course, that any other
additional wiring needed for the system in question has
already been done or is also being done at this time
(controller wiring, for example). Once the wiring inter-
face is in place, the next thing to consider is AZL meter
adjustment.
Figure 1. Installation/Block Diagram
AZL
P/T
CONTROLLER