Owner's manual

Quantum Series 140 EHC 204 00sc 140 EHC 208 00sc

The modules 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:

• Eight input channels

• Support for four quadrature encoders

• Eight external enable inputs

• Input voltage ranges: AC (50 mV to 75V peak), 5VDC, 12VDC, 24VDC

• Eight 24V gating (enable) pulses for meter proving

• Input filter frequency 50 kHz max., AC or DC

• Maximum count value 65 K or 16 M

• Programmable scaling, K, M, and R factors

• Channel update time 4 ms/channel

• Rate output

• Counter logic level state

• Programmable counter functions: start, stop, reset, preset, max limit

• Programmable counter alarm flags and zero flags in internal counter and rate operating modes

• Two software-selectable filters: 30 or 50 kHz digital, 15 kHz analog

• Channel-to-backplane isolation 1000VDC

• Channel-to-channel isolation 0 V