Positron Teleline Isolator 7501-16A, Description And Installation

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Plug-in OPX Card 9
7501-16A, B, C
3. Hardware Description
The OPX Card is comprised of two sides. The Station side is located on the upper
portion of the card and the CO side is located on the lower portion of the card.
The Station side is separated from the CO side by the isolation transformers
which create a 4¼ inch isolation gap. For the card’s block diagram, refer to
Figure 7.
Figure 7 Block Diagram
STATION SIDE
CO SIDE
ISOLATION GAP
ISOLATION
TRANSFORMER
ISOLATION
TRANSFORMER
TRANSIENT
TRANSIENT
TEST JACK
TEST JACK
T
T
R
R
PROTECTION
PROTECTION
MOSFET
TIMING
VOLTAGE
INPUT
NEGATIVE
SWITCHES
MOSFET
SWITCHES
IMPEDANCE
POWER
SUPPLY