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Functional Safety K-LB-*.*, F*-LB-I, P-LB-*.*.*
Product Description
2
Product Description
2.1
Function
General
The surge protection barriers are used as modules positioned upstream in the circuit
from the corresponding electrical equipment. The surge protection barriers make it possible
to protect against overvoltages originating from various causes (lightning strikes, switching
processes, etc.). This is achieved by diverting the transient current and limiting the voltage
throughout the duration of the overvoltage surge. Various modules are available for protecting
2 or 4 conductors.
DIN Mounting Rail Modules
K-LB-*.*
This surge protection barrier provides low line-to-line clamping voltage and 500 V
line-to-ground clamping voltage for a protected device. The device can be used to protect
devices that have more than 500 V isolation-to-ground, such as intrinsic safety isolated
barriers, signal conditioners and most field devices.
K-LB-*.*G
This surge protection barrier provides a low line-to-line clamping voltage and line-to-ground
clamping voltage for the protected device. The device can be used to protect instruments
that have less than 500 V isolation-to-ground, such as zener barriers, standard I/O cards,
and some field devices.
Plug-In Modules
P-LB-*.*.*
This surge protection barrier is designed for use with the isolators of the K-System.
By simply snapping the device into a standard isolator, the isolator are safely protected.
The end digits of the model designation correspond to the protected terminals
of the respective isolator.
Field Mount Modules
F*-LB-I
This surge protection barrier provides 85 V line-to-line and 500 V line-to-ground clamping
voltage for the protected field device. The device also protects field devices that have less
than 500 V isolation-to-ground. The device is installed in an available conduit or cable gland
opening like those found on most process transmitters.
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