Inxpect LBK Series - 3.2.10 External Resistor for OSSD Outputs

Idle signal is 24 V dc, periodically shortly pulsed to 0 V (pulses are not synchronous) for the receiver to detect
shortcut to either 0 V or 24 V.
The pulse duration at 0 V (T
L
) can be set at 300 μs or 2 ms through the Inxpect Safety application (Settings >
Digital Input-Output > OSSD Pulse width).
For details, see "Technical references" on page86.
3.2.10 External resistor for OSSD outputs
To guarantee the correct connection between the OSSDs of the control unit and an external device, it may be
necessary to add an external resistor.
If the pulse width set (OSSD Pulse width) is 300 μs, it is strongly recommended to add an external resistor to
guarantee the discharge time of the capacitive load. If it is set at 2 ms, an external resistance must be added if
the resistor of the external load is greater than the maximum resistive load allowed, see "Technical data" on
page87.
Below are some standard values for the external resistor:
OSSD Pulse width value
External resistor (R
e
)
300 μs 1 kΩ
2 ms 10 kΩ
3. Get to know LBK System Series
LBK System Series| Instruction manual v1.2 SET 2021|SAF-UM-LBKBus-en-v1.2|© 2020-2021 Inxpect SpA
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