Module features – Spectrum Controls 140 EHC 204 00sc User Manual
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Quantum Series 140 EHC 204 00sc 140 EHC 208 00sc
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The modules flow meter mode is compatible with a variable reluctance AC input, which counts AC zero crossing
signals from 50 mV to 75V AC peak.
Count input modes include uni-directional, bi-directional and quadrature. Bi-directional and quadrature inputs
require the use of two inputs, with up to four counters of this type being supported.
The module accepts +5 to +45 V gating (enable) pulses for standard meter proving applications. To
accommodate these pulses, the module uses a pulse-to-enable converter circuit that can be enabled and disabled
with software. Note that this module does not perform pulse interpolation for meter proving.
The module also has external inhibit/trigger lines using a 5V discrete pulse to regulate activity.
Module Features
The Quantum counter module features:
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Eight input channels
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Support for four quadrature encoders
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Eight external enable inputs
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Input voltage ranges: AC (50 mV to 75V peak), 5VDC, 12VDC, 24VDC
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Eight 24V gating (enable) pulses for meter proving
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Input filter frequency 50 kHz max., AC or DC
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Maximum count value 65 K or 16 M
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Programmable scaling, K, M, and R factors
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Channel update time 4 ms/channel
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Rate output
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Counter logic level state
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Programmable counter functions: start, stop, reset, preset, max limit
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Programmable counter alarm flags and zero flags in internal counter and rate operating modes
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Two software-selectable filters: 30 or 50 kHz digital, 15 kHz analog
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Channel-to-backplane isolation 1000VDC
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Channel-to-channel isolation 0 V