Digital counter
S311D
Seneca
- Universal opto isolated digital input; admitted types: reed, npn (2 wires or 24 V), pnp (24 V), NAMUR, photoelectric, Hall, 24 V input, TTL, variable reluctance.
- Digital input signal frequency measurement from 0.00015 Hz to 10 kHz.
- Increment or decrement totalizing of the digital input signal.
- View of the frequency measurement and/or totalized value.
- Programmable retransmission of the input value frequency by the isolated analog output (voltage or active/passive current).
- Retransmission of the totalized value by the isolated digital output (Open Collector).
- Totalizer value is saved on non-volatile memory.
- Filter programmable at 20 levels to stabilise reading.
- Totalizer reset by auxiliary digital input, buttons pressure or Modbus register 4, 6, 8 or 11 (4+7) Digits display.
- In case of optional card use, two relay alarms are activable on the input measurement frequency (maximum, minimum, automatically resettable or not).
- Alarms status visible through two leds on the frontal panel.
- RS485 serial communication with MODBUS RTU protocol (by optional board), maximum 32 nodes.
- Two relay outputs (available on the optional card) for alarms signalling.
- Easy navigation on the programming Menu by three buttons on the frontal panel.
- Quick configuration of the alarm thresholds by the Quick Alarms Menu.
- Display contrast settable.
- Very Low Frequency Mode (VLF) automatically set if fmax £ 1 Hz.
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