FloBoss 407 Instruction Manual
A-2 Rev 5/00
In general, it is recommended an LPM be used to protect the circuitry for each field input or output. An
LPM can be used with any type of input or output as long as the normal operating range of the input or
output is less than the clamping release voltage of the LPM; therefore, the LPM cannot be used with a
120 volt ac signal on a DO Relay Module. The LPM is most often used with analog and pulse inputs.
The LPM has little effect with an RTD module; however, the LPM protects the I/O rack and other
modules.
A.3 INITIAL INSTALLATION
The LPM plugs into any of the field terminal block sockets located on the termination board. To add an
LPM to protect a built-in analog I/O channel or an I/O module, perform the following steps. Refer to
Figure A-2.
LPM407
PWR
MVS AI AI/PI
LPM-2
I/O Wiring
Connect green
wire to enclosure
ground bar or
ground lug
Figure A-2. Typical Lighting Protection Module Installation
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