Module Spectrum
S5-90U/S5-95U
Function
The module 6ES5 464-8MB11 is suitable for connection of voltage sensors.
Wiring of the module (two-wire connection) is shown in the block diagram (on the first page of the
module description).
Start-Up of Module
Set the intended operating mode using the switch on the front panel of analog input module 464-
8MB11. The switch is located on the right side at the top of the front panel of the module.
Power supply Set the
switch
to the available power supply frequency. This selects the inte-
frequency:
gration time of the A/D converters for optimal interference voltage suppression.
Power frequency 50 Hz:
Integration time 20 ms
Power frequency 60 Hz:
Integration time 16.66 ms
Operation:
Set the number of channels you wish to assign on the input module. If there are
fewer than four channels, the measured values will be updated faster.
Broken wire:
Once the broken wire signal has been activated, a break on one of the lines to the
sensor or of the sensor itself causes the red LED above the function selection
switch to light up. At the same time, the broken wire error bit F (bit 1, byte 1) for
the faulty channel is set.
The module "recognizes" a wire break by applying a conventional tripping current to
the input terminals and by comparing the resulting voltage to a limit value. If there
is a wire break in the sensor or the lines, the voltage exceeds the limit value and a
"wire break" signal is sent. When the signal at the input is measured with a digital
voltmeter, the tripping current pulses cause apparent fluctuations of the signal.
Deactivation of the wire break signal does not turn off the tripping current.
15-60
EWA 4NEB 812 6115-02b
Содержание SIMATIC S5-90U
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