Endress+Hauser gammapilot FTG 671, Operating Instructions Manual

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2.3 Gammapilot installation
Gammapilot transmitters must be installed outside hazardous areas, whereby three
possibilities for mounting exist:
•
Standard 19" rack with space for 12 7HP cards,
•
Field housing with space for up to 6 7HP cards,
•
Monorack II housings for single transmitters.
Rack installation A Racksyst system can be ordered fully wired, in which case the detectors and the
external power supply only need to be connected. Planning hints can be found in
Publication SD 041F, »Racksyst Assembly Racks«. For non-Racksyst installations and
for installations including non-Racksyst cards, fill the rack as follows (see also Fig. 2.9):
Rack arrangement
Step Procedure
1 Allocate the power supply (NT 470/471) at the rightmost position.
-
If two NT 470s are used, install a 2 HP dummy panel between them.
2 Install non-intrinsically safe transmitters next to the power supply.
-
Install a 2 HP dummy panel between all foreign transmitters and between
Racksyst cards and foreign transmitters
3 Install intrinsically safe transmitters to the left of the rack.
-
Install foreign cards first.
- Install dummy panels between all foreign transmitters and between Racksyst
cards and foreign transmitters in accordance with the instructions on the
Ex-Certificate.
- No spacer is required between Racksyst cards.
Racksyst field housing Instructions for installing Commutec transmitters in the Racksyst field housing with half
19" rack are to be found in Publication PI 003.
•
Check that the field housing is not installed in direct sunlight.
- If appropriate fit a protective sun cover.
•
The maximum permissible ambient temperature for the field housing varies
b50
…
+60 °C according to the power consumption of the cards
(0
…
20 W)
For EMC reasons we advise you to use special guide rails with metal clips when the
plug-in card is installed in the field housing or subrack. This connents the instrument
input filter to the subrack potential.
BA082D12
Non-E+H
(Ex)i devices E+H (Ex)i
devices E+H devices Non-E+H
devices NT power
supply
Spacing between
non-E+H (Ex)i devices
as per certificate 2 HP dummy panel between
E+H and non-E+H devices
Fig. 2.9:
Recommended arrangement
for Racksyst rack assemblies
Gammapilot FTG 671 Chapter 2: Installation
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