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Outputs
8 digital outputs are available on the module:
• O
• O
Positive-switching outputs are suitable for connecting resistive and
inductive loads of 2 A maximum. They have an integral discharge circuit
which means they are also suitable for connecting capacitive loads of up
to 1 µF. The use of higher capacitive loads will lead to an error (I/O-group
stopped). Negative-switching outputs are also suitable for connecting
resistive and inductive loads of 2 A maximum. However, individually these
outputs can only be used for non-safety-related functions.
Two dual-pole outputs can be configured: output O
output with O
one dual-pole output is configured, this must be formed between O
Dual-pole outputs are addressed via the address of the positive-switching
output (O
or O
outputs would then have to be managed separately within the user pro-
gram.
If the PSS master sends a "1" signal to a positive-switching output via
SafetyBUS p, the PSS SB DI8O8 will supply approx. 24 VDC to the
relevant output, which will show high impedance at a "0" signal.
ve-switching outputs do the opposite. At a "1" signal, approx. 0 VDC will be
present at the output; at a "0" signal the output will show 24 VDC with high
impedance.
Output status is displayed via green LEDs. The corresponding LED will
light as soon as a "1" signal is present at the output.
Diagnostic circuitry tests the function of the outputs. The status of the
outputs is constantly compared with the process image of outputs.
Outputs that are switched on are switched off at regular intervals, to check
that the output transistors can be switched. Outputs that are switched off
are switched on at regular intervals in order to test the monitoring circuit. A
test will also be carried out to check for shorts between the outputs.
Operating Manual
... O
are positive-switching ("Load Supply") 2 A outputs
0
5
and O
are negative-switching ("Ground") 2 A outputs
6
7
and output O
6
or O
). In principle it is also possible to wire outputs O
4
5
to a negative-switching output to form a dual-pole output; both
3
can form a dual-pole output with O
5
can form a dual-pole
4
. If only
7
/O
5
,O
0
1
Negati-
.
7
,O
2
7
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