Model CFA-24 Transparent Cable Farm Automation Switch Reference Manual Page 16 of 78
4.2 Punch Down Block
Each punch down block accepts 4 twisted-pair AWG22-26 solid wire connections
.
There are a total of 72 punch down
blocks on the front of the unit. 60 are dedicated to loop segment connections (two per loop segment) while 12 (referred
to as input/output connectors) are used to connect to the CO or CPE side of the unit (6 on top and 6 on bottom).
AWG-Metric Wire Equivalent Table
AWG Size (mm)
AWG Dia. (in)
Metric Dia.
26
0.0159
0.405
24
0.0201
0.511
22
0.0644
0.253
The punch down block for the CPE-side input/output connections of channels 9-12 is shown above.
4.3 Input/Output Connectors
Punch down blocks provide connectivity for the input/output connectors located on the top and bottom rows of the
CFA-24.
4.3.1 CPE Input/Output Connector
The top row connects to the CPE side. These connectors may also be used to jumper to another unit, where applicable.
4.3.2 CO Input/Output Connector
The bottom row connects to the CO side. These connectors are also used to cable to another unit, where applicable. See
Using CFA-PDTOOL-KIT
for instructions.
•
Use short cables for CPE and CO jumpers to CFA-24 Extenders that are the same as the Segment cable wire.
Maintain the twists of the pair across the jumper length between the CFA-24 Extenders.
