IFM Electronic Ecomat200 A 300 Bedienungsanleitung Seite 18

A300
STANDSTILL MONITOR
2. Function and features
The A300 is a pulse evaluation system for monitoring underspeed/standstill. It
receives pulses from external sensors, measures the pulse interval and calcula-
tes the input frequency (=actual value), compares it with the preset switch
point (preset value) and switches the output in accordance with the preset
parameters.
• Setting range: see type label (standard values: 5...25 and 20...100 pulses/min).
• Maximum input frequency: as standard 15,000 pulses/min (which corre-
sponds to 250 Hz).
Special versions: DA0025 (4.5 kHz), DA0038 (1.6 kHz), DA0200 (200 Hz).
If this value is exceeded, the A 300 switches as for input frequency = 0.
• Minimum pulse length: 2ms.
• Pulse pick-ups: 3-wire DC PNP, 2-wire AC/DC, 2-wire quadronorm,
incremental encoders, mechanical switches.
Signal level for the A 300 pulse input: minimum 14 V.
The monitor is not approved for safety tasks in the field of safety
of persons.
3. Mounting
Mount the unit in a control cabinet with a protection rating of at least
IP 54 to guarantee protection against accidental contact with voltages
and against atmospheric influence. The control cabinet should be
installed in accordance with local and national rules and regulations.
Mount the unit on a DIN rail or by means of a mounting base. Once mounted
leave enough space between the unit and the top and bottom of the control
cabinet (to enable air circulation and to avoid excessive heating).
Mounting of the pulse pick-ups:
Adhere to the mounting instructions of
the manufacturer.
For optimum functioning of inductive
switches the following dimensions
should be adhered to:
• B = 2 × A
• C = ½ × S
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