Hardware description 15
Hardware filtering for DC input signals
The extension module has DIP switches for adjusting the hardware
filtering time for DC input signals. By default, hardware filtering is
enabled for all digital inputs with a 10-millisecond filtering time. To
detect the input signal faster with a DC signal, you can shorten the
filtering time of the digital input in question to 1 ms. Shortening the
filtering time to 1 ms will, however, reduce the noise immunity of
the input.
Note: You must always use a 10-millisecond filtering time with an
AC input signal.
Item Description Additional
information
1 Retaining clips
Page 182Lock
3 Mounting screw
4 DIP switches for hardware filtering Page 15, 22
XDI1
2-pin detachable terminal blocks for digital inputs Page 23XDI2
XDI3
XRO1
3-pin detachable terminal blocks for relay outputs Page 23
XRO2
5 Diagnostic LED Page 27
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