Product specifications

Installation
Standalone Modules
Mount the unit to a secure surface using #8 (3mm) hardware in four places. See the drawing on the next
page for mounting dimensions. Be sure to allow sufficient room for the required minimum bend radius of
the fiber cable used.
Rack-Mount Cards
The unit slides into any open slot in the VF-SR-20/2 card cage. Use a small screwdriver to push and lock
the two ¼-turn fasteners into place. Please note that when installing this card in the position directly next
to the power supply in the card cage, it may be necessary to make the signal connections at the rear of
the card before fully seating the card into its slot.
Power Source
Note: This product (standalone unit) should be powered by a listed Class 2 power supply only.
For the standalone units, power to the unit must be within the specifications listed. A 24 VAC center tap
transformer rated at 400 mA is required. For the standalone units, an appropriate power supply is
included with the unit.
For the rack-mount models, power is supplied by the card cage. Please refer to the VF-SR-20/2 and VF-
PSR-2 instruction manual XX164-60 for further details.
Power Connection
On standalone units, power is supplied to the unit via a three-pin Phoenix connector. The ground wire
from the center tap supply must be connected to the center pin of the Phoenix connector. When installed
properly, the nominal voltage measured from the center pin to either of the outside pins will be 12 volts
AC and the nominal voltage measured from one outside pin to the other outside pin will be 24 volts AC.
For rack-mount units, power is supplied to the unit via a four finger backplane connector. The VF-404TR
and VF-404RR can be inserted into the card cage or removed from the card cage with power applied to
the backplane.
Input/Output Connections
The fiber optic connection is made via a ST connector located on the left side of the standalone units and
the back of the rack-mount units.
Video input connections are located on the right side of the standalone units and the back of the rack-
mount units. A BNC connector is provided for each channel. The video inputs are connected to an
appropriate 75Ω baseband video source such as a camera or a video recorder output. For optimum
performance, the video cables should be the shortest length of coax practical.