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Marsh Bellofram DigiTec Division D3870 Series 6-Digit Frequency Input Indicator/Totalizer

Marsh Bellofram DigiTec Division D3870 Series 6-Digit Frequency Input Indicator/Totalizer

Product catalog summary

Specifications:
The D3870 model operates with an input response range from 0.0005 to 99,999 Hz. It features a user-programmable display range from 0.00001 to 999999, with protection up to ±200 V peak. The device is compatible with TTL, CMOS, or contact inputs, requiring a minimum pulse width of 5 microseconds and triggering on the negative edge of the input pulse. It has an input impedance of 12kΩ and includes a front panel programmable digital filter for debounce.

Dimensions and Options:
The device weighs 0.84 lbs and is available with several options, including 3 Form-C 5 amp relays for control or alarm communication, an input amplifier for low-frequency inputs, 4 analog outputs with 0.35% accuracy, and RS232C serial data communications at 9600 Baud rate.

Features:
The D3870 provides accurate measurements for low-frequency inputs and displays pulse or frequency inputs as rate without requiring programming. It includes a 6-digit totalizer mode for accumulating totals, with a selectable preset value and optional SSR output. The device is housed in an anodized aluminum case with a NEMA 4X front cover and includes a Form A relay for alarm output.

Process Applications:
The D3870 is suitable for applications involving level, pressure, and flow measurements.

Catalog excerpts

Marsh Bellofram DigiTec Division D3870 Series 6-Digit Frequency Input Indicator/Totalizer-1

\\\SPECIFICATIONS INPUT RESPONSE 0.0005 to 99,999 Hz DISPLAY RANGE User programmable decimal, scale factors and insignificant zero blanking yield a display range of 0.00001 to 999999. PROTECTION ±200 V peak SENSITIVITY TTL, CMOS or contact compatible PULSE WIDTH 5 microseconds minimum TRIGGER MODE Negative edge of input pulse INPUT IMPEDANCE 12k½ FILTER/ DEBOUNCE Front panel programmable digital filter WEIGHT 0.84 lbs. \\\DIMENSIONS (INCHES/MILLIMETERS) MODEL NUMBER >>>>>> 3870 Options choose any combination 3 Form-C 5 amp relays activate when programmable high and low limits are exceeded. Permits on-off control of external circuitry, or alarm status communication with other equipment C Input amplifier, 30 mV peak input at 5 Hz to 99,999 Hz G 4 analog outputs, 0-5 VDC, ±5 VDC or 4-20 mA. Accuracy is 0.35% of operating range. Output signals are assignable to rate and total. H 230 VAC Power S RS232C serial data communications interface at 9600 Baud rate T 508 800.727.5646 atcdigitec.com Digitec Division 311 The Digitec D3870 provides fast, accurate measurements even with very low frequent inputs (as low as one pulse per 100 seconds). All pulse or frequency inputs are easily displayed as rate. Easy setup with no programming or calculations required. Setup entries include time base, scale, offset. The D3870 features a 6-digit totalizer mode that can be independently scaled and displayed. The totalizer mode can accumulate totals for units or events (i.e. gallons, revolutions, pounds, etc.) since power-up or last reset. Totalizer includes a selectable preset value and optional SSR 20 msec. output. The D3870 is packaged in an anodized aluminum case with a NEMA 4X front cover. One (1) Form A relay 240 VAC @ 1A that can be used as an alarm output is included. PROCESS APPLICATIONS • Level • Pressure • Flow 6-Digi t F requenc y I npu t I n d i c a to r / T o t a l i z er D3870 Series Ratemeter/Totalizer/Barch Controller // D3870

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