2TLC172289M0201
Rev C
16
www.abb.com/jokabsafety
2018-04-17
Minimum distance between adjacent devices
When several AOPDs must be installed close to each other, the transmitter of one device must not interfere
hazardously with the receiver of the other device.
Interfering Passive B device must be positioned outside a minimum D
do
distance from the axis of the Active A
–
Passive A couple, see figure below.
PASSIVE A
PASSIVE B
ACTIVE A
ACTIVE B
Figure 13
– Distance between adjacent devices
This minimum D
do
distance depends on:
the operating distance between Passive A and Active A,
the effective aperture angle of the AOPD (EAA):
For a Type 4 AOPD, EAA
MAX
= 5°
(α = ± 2.5°).
The diagram below shows the minimum distance to the interfering devices (D
do
) based on the operating distance (D
op
)
of the couple Passive A
– Active A for a Type 4 AOPD.
Figure 14
– Minimum distance to an adjacent device as a function of the operating distance
The formula to get D
do
for a Type 4 AOPD is the following:
D
do
(m) = 0.3
for operating distance < 3 m
D
do
(m) = operating distance (m) × tan (2
)
for operating distance
3 m
Warning!
Please note that the Passive A can interfere with Active B in the same way as Passive B with Active A and,
if the two pairs of AOPD have different operating distances, the longest one should be used for the calculation of D
do
.
Содержание Orion 3 Base
Страница 24: ...2TLC172289M0201 Rev C 24 www abb com jokabsafety 2018 04 17 Figure 20 Connection to a Pluto B20 safety PLC ...
Страница 26: ...2TLC172289M0201 Rev C 26 www abb com jokabsafety 2018 04 17 Figure 23 Time chart of the OSSD outputs ...
Страница 42: ...2TLC172289M0201 Rev C 42 www abb com jokabsafety 2018 04 17 14 EC Declaration of conformity ...
