Mounting The Nivotester; Ambient Temperature; Spacing Of Units - Endress+Hauser nivotester FTC 420 Operating Instructions Manual

Installation

Mounting the Nivotester

The degree of protection of the Nivotester housing is IP 40, that of
the terminals IP 20. Where possible, the units should be mounted
in a switch cabinet or shady position
The limit switches use Minipac housings with snap-on fastenings
suitable for switch cabinet installation on a symmetrical (top hat)
rail. The rail corresponds to EN 50022-35x15 or EN 50022-35x7.5 .
Mount as follows:
Step Procedure
1 Latch the housing on the top of the rail.
2 Push home until the housing snaps on the rail.
The position of installation should be chosen such that the ambient
temperature does not drop below –20 °C or exceed 60 °C
Fig. 4 is an installation diagram for mounting several units together.
• The vertical spacing between adjacent rows of units must
exceed 25 mm.
• Units can be mounted flush with each other provided the ambient
temperature (measured 1 cm above the unit) does not exceed
50 °C.
• If a gap of 10 mm is left between adjacent units, an ambient
temperature of up to 60° is permissible.
• The minimum permissible ambient temperature is –20 °C.
Top hat rail EN 50022-35x7,5
25
Procedure:
Snap-on mounting
Stand-alone installation
Switching cabinet installation
Fig. 4
Spacing for row or bank mounting
25