The 1746sc-CTR4 is a Flowmeter/counter module from Spectrum controls. This is compatible for use with Allen-Bradley’s Smart Logic Controllers (SLC) platform. This module can accommodate Four (4) quadrature encoder inputs and Four (4) external counter enable inputs and accepts input voltage signals raging 50mv–75VAC peak, 5 Vdc, 12 Vdc, 24 Vdc along switching input frequency of AC 50 kHz Max, DC 50 kHz Max. The 1746sc-CTR4 has configurable input filters such as 50kHz, 30kHz for a digital filter, and 15 kHz for an analog filter. Accepted minimum input pulse time is 8us external enable and disable setup time is 20us. Individual channel update time is 4.0 msec for OFF transition and 5.6 msec for ON transition. The module’s count mode accuracy is +/- 1 count; Rate (instant) accuracy of +/- 1% @ 50 kHz and 0.001% @ 1 Hz and Rate (average) accuracy -f 1 kHz. The module’s maximum count value includes for low range -32,768 to +32,767 and -8,388,608 to +8,388,607 for high range. It has built-in fault detection properties such as Over & under range status bits for all operating modes. The module’s data format are maximum binary value of -8,388,608 to +8,388,607 and -32,768 to +32,767for counter mode and rate mode, respectively. The 1746sc-CTR4 has a Module status indicator and Four (4) individual input status indicator LEDs. Which can be used by operators and plant personnel as a troubleshooting reference. For terminating input signals, this module is supplied with a 24 pin removable connector, compatible with wiring One 12 AWG to 28 AWG wire to each terminal.

The 1746SC-CTR4 from Spectrum Controls is one of the best quadrature encoder counter modules available on the market today. This module is a 4-channel counter / flowmeter module. The 4 external counters of the 1746SC-CTR4 enable command input for the device. The 1746SC-CTR4 makes the automation of filling stations in factories.The 1746SC-CTR4 is programmable for both alarm flags and zero flags as required during operations. It also accommodates for K, M, and R factor manipulation that is scalable through programming. The 1746SC-CTR4 has 4 quadrature encoder input channels.

The input voltage rating for the 1746SC-CTR4 ranges between 0 and 30 Volts AC and 5 and 24 Volts DC, respectively. The operational voltage rating of the 1746SC-CTR4 ranges between 3 and 30 Volts AC and 0.05 and 30 Volts AC, respectively. The frequency rating of the 1746SC-CTR4 is 50 KiloHertz. The 1746SC-CTR4 has a pulse time of 10 milliseconds only. The channel update time of the device is less than 4 milliseconds. The 1746SC-CTR4 comes with two options which are the counter mode and the plus-minus count. The frequency range of the 1746SC-CTR4 is 1% at 50 Hertz and 0.002% at 1 Hertz. The input impedance rating of the 1746SC-CTR4 is 25 Kilo Ohm. The device is UL compliant and it meets all the safety standards of the industry.