Wallace Perimeter Security SPEEDGATE - Page 125

SPEEDGATE Installation and Maintenance Manual Revision 1 - MAY 2023
125
TROUBLESHOOTING
The following ferrite EMI cable core installaon instrucons are provided for informaonal purposes
only. Consult Wallace Perimeter Security for installaon requirements relevant to your project.
1. Unplug cable, located in the operator enclosure, connecng the primary and secondary controller
COM boards.
2. Twist the cable ve mes around the ferrite EMI cable core on both sides (i.e., one cable core at each
end). In some instances, mulple twists may be required; e.g., as many as possible.
3. Plug cable back into board.
PART
NUMBER
DIMENSIONS mm
(inches)
Typical Impedance (Z) in ohms (Ω)
Ω @ 500 KHz Ω @ 1 MHz Ω @ 5 MHz
# of Wire Turns # of Wire Turns # of Wire Turns
A B C 1 2 5 1 2 5 1 2 5
LFB259
128-
000
25.91
(1.020)
12.83
(0.505)
28.58
(1.125)
61 220 1446 106 420 2647 62 240 1487
EMI shielding occurs when the geometry and electromagnec properes of coiled wire over the ferrite
core aenuate high-frequency EMI/RFI electronic noise from acve components, eecvely protecng
other boards or components in the vicinity from EMI contaminaon.