Phoenix Contact Axioline F, User Manual, Page: 15 / 86

Product description
105739_en_04 PHOENIX CONTACT
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2.4 Safe digital outputs
The module has safe digital outputs which can be used as follows:
– For two-channel assignment: four two-channel outputs
– For single-channel assignment: eight single-channel outputs
Technical data for the safe outputs: “Safe digital outputs” on page 68.
Parameterization The safe digital outputs of a module can be parameterized in pairs. This means that the
outputs can be adapted to various operating conditions and different safety integrity levels
can be implemented (SIL, SILCL, Cat., PL).
In order to achieve a high level of error detection, the test pulses must be enabled. If this is
not possible for the connected loads, the test pulses can be disabled, however, error
detection is then reduced.
Information on the parameterization of the outputs: see Section 5.2 “Parameterization of the
safe outputs” on page 34.
Diagnostics Diagnostics are provided via both the local diagnostics indicators and the diagnostic
messages which are transmitted to the controller.
Information on the diagnostic messages of the outputs: see Section 8 “Errors: messages
and removal” on page 51.
Requirements for
actuators/controlled
devices
Functional safety places requirements on the design of actuators/controlled devices.
• Use suitable actuators/controlled devices which are described in the applicable safety
standards, for example.
The module's ability to detect errors depends on the parameterization.
• Adapt the module parameterization to the relevant actuator/controlled device: see
Section 5 “Parameterization of the module” on page 33.
If the outputs are parameterized with test pulses, the output circuits are tested by test pulses
at regular intervals. These test pulses are visible at the output and can trigger undesirable
reactions with quick responding actuators. The test pulses are either light pulses (brief
activation) which can be disabled or dark pulses (brief deactivation) which cannot be
disabled.
The safety integrity (SIL, SILCL, Cat., PL) and error detection that can be achieved
depend on the parameterization, the structure of the actuator, and the cable installation:
see Section 6 “Connection examples for safe outputs” on page 37.
WARNING: Loss of safety function
Using diagnostic data for safety-related functions can result in the loss of the safety
function as diagnostic data is not safety-related.
• Do not use the diagnostic data for safety-related functions or actions.