System design and selectable functions
14
SOLID-2
Leuze electronic
Review-Stand, , 8. April 2015
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Another possible way to suppress mutual influence is to switch one of the two protective
devices from transmission channel 1 to 2 and thus to differently formed pulse packages.
This solution should be considered when more than two optical safety systems must be
arranged next to each other.
Both the transmitter and the receiver of the optical protective system in question must be
switched from transmission channel 1 to 2. For additional information, see Chapter 6.
3.2.2
Internal or external testing
If external testing is desired, the test input of the transmitter must be wired in accordance
with the connection and operating instructions of the selected testing safety interface. The
testing safety interface will turn the transmitter off and back on, verifying that the selected
single OSSD of the receiver is turned off and on in accordance. For more details, see
Chapter 6.1.1.2.
In most cases, however, internal cyclical testing is sufficient. For this purpose, the
transmitter‘s test input must be connected with +24V DC. Both OSSDs must be integrated
into the safety circuit as a two-channel system.
3.3
Selectable function of the Receiver Standard and Extended
3.3.1
Transmission channel
If the transmitter is switched to transmission channel 2, the corresponding receiver must
also be set to transmission channel 2. See Chapter 6.
a = AOPD “A“ transmission channel 1
b = AOPD “B“
transmission channel
2, not affected by AOPD “A“
Fig. 3.2-1:
Transmission channel selection
a
b
