Testing; Receiver - Leuze electronic SOLID-2SF-M Original Operating Instructions

Electrical connection
6.1.2

Testing

ATTENTION!
In fault-free operation, the cyclical internal testing delivers a signal on the Dyn. SSD alternating
between low and high every 300 ms. Detected errors are signaled by a static signal.
The downstream control must evaluate the safety-relevant aspects of this signal and activate a machine
stop if the signal does not change.
There is also the option of external testing, with which the SSDs of the receiver switch off consecutively
as a response to the creation of a test signal on the transmitter. If external testing is required, the trans-
mitter's test input must be wired accordingly (see below).
In most cases, however, internal cyclical testing is used. For this purpose, the transmitter's test input must
be permanently connected to +24 V DC.
Internal cyclical testing
To activate external testing, connect Pin4 of the transmitter permanently to +24 V DC.
When using the internal cyclical testing, the corresponding SSDs and the shared Dyn. SSD must always
be evaluated for safety reasons by the downstream control.
External test signal
To use the external testing option, connect the test output of the corresponding evaluation unit with Pin4
of the transmitter. When using external testing in combination with a test evaluation unit, only the SSDs
must to be connected to the test evaluation unit.
NOTE
External testing takes precedence over internal testing. If the external test is used, a corre-
sponding frequency of the dangerous movement (typically at least 10 times as frequent) is suffi-
cient to guarantee test frequency.
Test input Pin4, transmitter:
a = External test signal
b = High-impedance or 0 V
Figure 6.2: SOLID-2SF external testing
6.1.3

Receiver

Figure 6.3: 8-pin SD-2R (view of the pins)
Leuze electronic GmbH + Co. KG
+24V DC
High-impedance or 0V
8 - 150 ms
b
a +24 V DC
6 - 12 ms
+24 V DC
SSD1
Approx.
+24 V DC
SSD2
Approx.
+24 V DC
SSD3
+24 V DC
SSD4
Test = Not activated
Test = Activated
6 - 12 ms
Approx.
Approx.
Approx.
1
2
3
4
5
6
7
8
SOLID-2SF-M
Approx.
White
Brown
Green
Yellow
Gray
Pink
Blue
Black
19