Mounting
Leuze electronic
MSI-TRMB
20
S
[mm]
= Safety distance
t
a
[s]
= Response time of the protective device
t
i
[s]
= Response time of the safety relay
t
m
[s]
= Machine stopping time
6.1.2 Multi-axis arrangement
With multi-axis installation, the light beams must run parallel to the reference plane (e.g. floor) and must
be aligned mutually parallel.
When mounting multiple protective sensors, no transmitter may be directed any receiver within the series
connection other than that which is intended. Note that the operating ranges of photoelectric sensors may
be larger than the specified maximum ranges. Correct mounting of the protective sensors must be checked
by means of tests and secured against misalignment.
a
Transmitter
b
Receiver
Figure 6.1: Multi-axis arrangement
6.1.3 Minimum distance to reflective surfaces
a
Required minimum distance to reflective surfaces [mm]
b
Protective field width [m]
c
Reflective surface
Figure 6.2: Minimum distance to reflective surfaces depending on protective field width
If longer stopping times are determined during regular inspections, an appropriate additional time
must be added to t
m
.
S
1600 mm t
a
t
i
t
m
+
+
850 mm
+
=
a
a
a
b
b
b
WARNING
Failure to maintain minimum distances to reflective surfaces may result in serious injury!
Reflective surfaces can indirectly deflect the transmitter beams to the receiver. In this case, interruption
of the protective field is not detected.
ª
Make certain that all reflective surfaces are the necessary minimum distance away from the protective
field.
a
b
4°
4°
c