WEG PSRW, Руководство пользователя

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Signals
PSRW | 5-1
5
5 SIGNALS
5.1 DIGITAL INPUTS
The PSRW has four (4) dual-channel safety inputs that can take up to three (3) different configurations, being
possible to individually configure contact filter and reset options. The inputs are identified by the name INx_y,
where ‘x’ is the input number (1 to 4) and ‘y’ is the channel (A or B). See
Table 3.1 on page 3-2 .
5.1.1 Contact Filter and Reset
The contact filter is used to prevent noise in the contact line from jeopardizing the input operation. There are only
two contact filter options: 4 milliseconds or 16 milliseconds. The users should choose the best option for their
application.
ATTENTION!
The filter time influences the response time of the PSRW and must be considered in the calculation of
the total response time:
PSRW response time = input processing. See
Section 6.2 TECHNICAL SPECIFICATIONS on
page 6-1 .
It is possible to set the reset type for each input. When the option “reset dependent” is selected, it indicates to the
logic that the input depends on a manual reset.
When not selected, it indicates automatic reset.
When all inputs have the option “reset dependent” selected, the logic reset will be manual.
When all inputs do not have the option “reset dependent” selected, the logic reset will be automatic.
When the inputs have different selections for the option “reset dependent”, the logic reset will be mixed.
For further information, see Item 5.2 RESET INPUTS on page 5-2 and Item 5.3 Reset on page 5-3 .
5.1.2 Input Type: Electrical/Mechanical Contact Input
This input type is used for safety devices with mechanical or electrical contact that do not provide energy; they
only close the circuit. Those devices can be pushbuttons, safety relay contacts, safety contactors, safety sensors
with isolated output, etc.
For this type of input, it is mandatory to use the test outputs in order to detect anomalies and short circuits.
For further information, see Chapter 8 CONNECTION EXAMPLES on page 8-1 .
5.1.3 Input Type: PNP Input
This input type is used for safety devices that supply energy when activated (PNP Output). Safety devices with
PNP output generate pulses on the output channels for internal diagnostics. The PSRW recognizes such devices
through these pulses, and their absence will result in an input fault. Those devices can be light screens, safety
controllers, safety PLCs, safety sensors, etc.
To differentiate the test pulses from an actual event, the PSRW uses the following reference: