WEG PSRW, Руководство пользователя

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Signals
5-2 | PSRW
5
Tep
Tp
INx_A
INx_B
Tp = pulse time
Tep = time between pulses
Figure 5.1: Example of test pulses
For the PSRW to identify the pulses as test pulses, ‘Tp’ cannot be longer than 1 millisecond, and ‘Tep’ cannot be
longer than 50 milliseconds.
For further information, see Chapter 8 CONNECTION EXAMPLES on page 8-1 .
5.1.4 Input Type: Simultaneity Control
This type of input is used to control the simultaneity between two actuators. The two actuators must have
electromechanical contacts and be connected to the test output circuit.
The maximum simultaneity time is 0.3 seconds according to ISO13851.
Since two actuators are used, two PSRW inputs will be used, allowing only two simultaneity controls per PSRW.
The simultaneity control can only match: Input 1 and 2 or Input 3 and 4.
The actuators must contain NO and NC contacts and be connected to the PSRW so that the test output channels
are reversed. At the first input (1 or 3), the NO contact must be connected to channel A and the NC contact to
channel B. At the second input (2 or 4), the NC contact must be connected to channel A and the NO contact to
channel B.
For further information, see Chapter 8 CONNECTION EXAMPLES on page 8-1 .
5.2 RESET INPUTS
The PSRW has two reset inputs: RST_1 and RST_2.
They are used to validate the state of the digital inputs IN_1, IN_2, IN_3 and IN_4. Each reset input is exclusively
related to its respective safety output.
RST_1
OSSD_1
ch A
ch B
RST_2
OSSD_1
ch A
ch B
(a) Input RST_1 (b) Input RST_2
Figure 5.2: (a) and (b) Reset inputs
To increase the safety level of the application, it is recommended to use an EDM connected in series with the reset
inputs, regardless of the configured operating mode.
The reset inputs are configurable by the user and can operate in automatic, manual or mixed (manual and
automatic simultaneously) mode according to the application requirements.
For the automatic mode, the reset validation takes place immediately after each transition of the digital inputs,
provided that the reset input is at high level (+ Vdc).