User Manual

Copyright 2012 Page 10
3. Hardware
3.1 Interface Requirements
Some I lenses have both a camera communication connector (four contacts built in
the PL mount as shown in figure 2) and an external communication connector (figures 3
and 4). Some lenses have only the camera communication interface. Each interface is
described in detail in Sections 3.1.2 and 3.1.3.
3.1.1 Power
Power can be supplied to the lens through either the camera connector or an
external connector (if available) or both. The maximum voltage which can be supplied
on either connector is 35V (DC).
Cooke I voltage range: 9 – 35V
Lens Type
Typical Current Draw
S4I Primes
30 milliamps
S4I Zoom - CXX
30ma
5I Primes
40ma when Illumination OFF / 70ma when Illumination ON
PanchroI Primes
70ma
3.1.2 Camera Connector
Signal voltages on the camera interface are at TTL levels where the quiescent state
of the data line is a logical high (greater than 2.4 volts).