5
INM7700-6
Jan 2010
TAG57
TGL7700
ERB57O
IMB57
ETL7000
ISP7000
110mm
110mm
170mm
Figure 5:
Clearance for accessories
Note:
For high profile (15mm) DIN rail, add 7.5mm to vertical dimension
1
2
3
1
2
Figure 6:
Clamping an MTL7700 Series barrier on to a DIN-rail
Figure 7:
Removing an MTL7700 Series barrier from a DIN-rail
250mm
Low-profile rail (7.5mm)
High-profile rail (15mm)
250mm
500mm
Figure 8:
Maximum DIN-rail spans between ISP7000 spacers
4.3.3
DIN-rail earth terminal (ETL7000)
See figure 10. For those applications (the majority) in which the IS
earth is NOT routed through the mounting surface, connections for
routing the IS earth from the DIN-rail to an appropriate plant earth
are made through earth terminals (ETL7000) clamped onto the DIN-
rail. Two terminals are recommended, one at either end of a column
of barriers, to provide redundancy and to simplify earth testing
procedures.
WARNING: Apart from rare occasions when the mounting
surface carries the IS earth, the ONLY method of providing
the IS earth connection from any one column of MTL7700
Series barriers is from ETL7000 earth terminals. Never make
the plant IS earth connection to the earth screen on any
individual barrier: this is MANDATORY. See also section 5.3.
ETL7000 terminals are attached to the rail as follows. Ensure the
same security of the earth connection to the rail as for the barriers
themselves (see section 4.2):
a) Hook the fixed end-clamp of the terminal over one flange of the
DIN-rail.
b) Press the body of the terminal downwards until the pivoting end-
clamp engages the other flange of the DIN-rail.
c) Clamp the terminal firmly into place by tightening the centre
screw.
d) Important: wire up the earth terminal as given in section 5.3.2.
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