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output. The status of the outputs is displayed through LEDs, which light
as soon as a "1"-Signal (24 V DC) is present at the relevant output.
Diagnostic circuitry tests the function of the outputs (not the pulsed
outputs). During each cycle the CPU compares the status of the outputs
with the process image. Any outputs that are switched on are switched off
once every self-check, to check that the output transistors can be switched
off.
If an error occurs, the controller goes into a STOP-condition, switches off
the outputs and sends an error message to the CPU display.
Outputs configured as pulsed outptus deliver test pulses to test the input
filter and the optocoupler on the input modules. Pulsed outputs are also
tested during the input module test.
Commissioning
CAUTION!
Electrostatic discharge can damage the components on the module.
Ensure against discharge before touching the module, e.g. by touching an
earthed, conductive surface or by wearing an earthed armband.
• The module should be installed in the module rack as described in the
"Series PSS 3000/PSS 3100 Installation Guidelines".
• Connect the 24 V DC supply voltage (see Connection Diagram).
• Connect the inputs.
• Connect the outputs with a resistive or inductive load (see Connection
DIagram).
• Connect the pulsed outputs to the inputs, set in the configuration.
Please note:
• Push-pull outputs should not be used to switch the negative side of the
load.
• Any breaks in the circuit or wiring, plus any shorts between the cirucits,
must be detected or made impossible by suitable circuitry.
• Outputs configured as 2 A outputs have monitoring inputs available
under the same address, which can be used for feasibility checks.
• If cable runs are greater than 0.5 km, you must check that the test signal
still functions by simulating short circuits between the pulsed inputs.
Operating Manual
3
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