LMI Technologies chroma+scan 24 0 Series, User Manual

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Section 2
2 Proper Handling and Precautions
2.1 System Installation
2.1.1 Component Grounding
All sensors should be grounded to the earth/chassis through their housing. For sensors
with through-hole mounts, this can be accomplished by using star washers on the
mounting bolts. The star washers must cut through the powder coating to provide
electrical conductivity from the mounting hardware to the sensor housing. For sensors
with tapped hole mounts, conductive hardware must to be used between the sensor and
the frame. This must be checked with a multi-meter by ensuring electrical continuity
between the frame and the connector housing on the sensor. It is imperative that the
scan frame or chassis that the sensor is mounted to is connected to earth ground.
Master networking products should have the housing connected to earth ground. This
can be accomplished using star washers on the mounting holes or through the earth
ground connection located on the rear of the Master 1200 and 2400. FireSync
Networking products should be installed inside electrical cabinets that are suitably
grounded to earth ground.
2.1.2 Shielded Cable
LMI Technologies recommends the use of shielded cables in all environments to ensure
isolation from electrical noise. The shield should be electrically connected to both the
sensor housing through the connector housing and to the electrical box containing the
Master.
LMI Technologies supplies both shielded FireSync cordsets and shielded FireSync cable
for building cordset.
2.1.3 Power Supply
The user must provide a suitable +48VDC power supply for the system capable of
handling an infinite capacitive load. These power supplies must be isolated such that DC
ground is NOT tied to AC ground. The power supply should be of a suitable capacity for
the size of the system.
LMI Technologies recommends the Phoenix Contact QUINT series of power supplies.