Reference Manual
00809-0100-4377, Rev BA
September 2010
Rosemount 752
2-6
HAZARDOUS
LOCATIONS
The 752 Remote Indicator has explosion-proof housing and circuitry suitable
for intrinsically safe and non-incendive operation. Individual indicators are
clearly marked with a tag indicating the certifications they carry. See
Appendix B: Product Certificates for installation drawings.
NOTE
Once a device labeled with multiple approvals is installed, it should not be
reinstalled using any other approval type(s). Permanently mark the
certification label to distinguish the installed approval type from unused
approval types.
Grounding the
Indicator Case
Always ground the indicator case in accordance with national and local
electrical codes. The most effective indicator case grounding method is a
direct connection to earth ground with minimal impedance. Methods for
grounding the indicator case include:
•
Internal Ground Connection
: The Internal Ground Connection screw
is inside the terminal side of the electronics housing. The screw is
identified by a ground symbol (
), and is standard on the 752 Remote
Indicators.
•
External Ground Assembly
: Ground screw is located at the bottom of
the mounting bracket.
NOTE
Grounding the indicator case using the threaded conduit connection may not
provide a sufficient ground. The transient protection terminal block (Option
Code T1) will not provide transient protection unless the indicator case is
properly grounded. Use the above guidelines to ground the indicator case. Do
not run transient protection ground wire with signal wiring; the ground wire
may carry excessive current if a lightning strike occurs.
Summary of Contents for 752
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