The DPF400 Series is a complete line of flowrate indicators offering exceptional performance at an economical price. Individual models are available for flowrate and totalization (with or without square root extraction) batch control.

The DPF400 is front panel programmable to scale any input range to display in desired engineering units. Independent scale factors for rate and total allow rate indication and totalization in different units, such as GPM rate and total barrels. If the optional RS-232 or RS-485 communications are installed, the unit may also be programmed by remote computer.

The DPF400 is available with 4 input types, including TTL/open collector pulse, low level frequency, analog voltage or analog current. The unit can be user-configured for one of three functions:

1. a ratemeter/totalizer/batcher
2. a ratemeter/totalizer/batcher with square root extraction (for differential pressure flow measurement)
3. a batch controller only with multibatch counting, auto/manual batch recycle, and remote or local STOP/CONTINUE control (START control can be obtained with a user supplied switch in series with the control relay)

Options to the DPF400 include analog and BCD outputs, alarm/control outputs, and RS-232 or RS-485 communications.

The RS-232 or RS-485 communications options are bi-directional, allowing the user to configure the DPF400 as well as read current values.

While each DPF400 comes standard with 5 open collector outputs, the optional DP40-R board provides dual 7A mechanical relays which replace two of the open collector alarms, for a total of two 7A relay and three open collector alarms.

SPECIFICATIONS
TTL Level Inputs (DPF401): 0.7 to 2.0 V threshold; 0.2 Hz to 20 kHz frequency; 24 V protection, positive trigger slope; 16 to 30 V unregulated 75 mA sensor excitation
Isolated Pulse Input with Excitation(DPF402): 60 Vrms with protection to 240 V max signal

	Excitation	Hysteresis	Sensitivity
DPF402	5 V	13 mV	30 mV
Low	8.2 V	22 mV	50 mV
Level	2.4 V	35 mV	60 mV

NPN Open Collector Input (DPF402): 3-wire connection; 12 V regulated excitation
NAMUR Input (DPF402): 2-wire connection; 8.2 V excitation; 1 kohm impedance; <1 mA activated, >3 mA deactivated
Contact Closure Input (DPF402): 2-wire connection; 12 V regulated sensor excitation, 10 on/off per second frequency range
Analog Input (DPF403): 0 to 5 V, 1 to 5 V, or 4 to 20 mA range; 0 to 10 V, or 0 to 1 mA inputs optionally available; 354 Vp isolation; programmable low-level shutoff; 0.02% FS non-linearity; 0.05% FS accuracy; accuracy, 50 ppm/°C temperature coefficient, maximum
Display: 6-digit, 14-segment LED, red or green; 13.8 mm H (0.54"); indicator lights for alarms and status modes
Display Update: 0.04 to 3 seconds, programmable.
Min. Input Frequency: 0.2 Hz
Power: 115 std., 230 Vac opt. 50/60 Hz; 10 Watts maximum
Accuracy: Frequency: 0.01% of reading; Analog: 0.05% of full scale
Step Response: Analog: 50 msec for 10 to 90% FS; Frequency: equal to selected gate time
Operating Ambient Range: 0 to 50°C (32 to 122°F), 95% RH, non-condensing
Storage Temperature: -40 to 85°C (-40 to 185°F)
RS-232 Communications (optional): Front panel programmable for 300/1200/2400/4800/9600/19.2k baud; RJ11 4-wire connection; complete program setup and message display capability; programmable to transmit all measured values, alarm status, actual measured input value (not scaled) and status on programmable intervals from 1 to 60,000 seconds.
RS-485 Communications (optional): 300/1200/2400/4800/9600/19.2k baud; RJ11 6-wire connection; addressable from 0 to 199
Open Collector Outputs: Five 150 mA @ 1 Vdc sink; 30 V open
BCD Output (optional): Isolated; 3- or 6-digit addressing; TTL level output; 5 Vdc external power supply required for isolated output
Mechanical Relays (optional): dual, form C; 7A at 230 Vac/30 Vdc
Analog Outputs (optional): 0 to 5 V/ 1 to 5 V/0 to 10 V/0 to 20 mA/4 to 20 mA all field selectable; all internally powered (sourcing); 600 ohms max. loop impedance for 20 mA outputs; min. 500 ohms input impedance for voltage outputs; 354 Vp isolation; 15-bit resolution; 0.1% of reading accuracy; 50 ms step response; fully adjustable zero and span adjustments.
Dimensions: 48 H x 96 W x 149 mm D (1.89 x 3.78 x 5.86")
Panel Cutout: 45 H x 92 mm W (1.772 x 3.622"); ¹⁄8 DIN
Weight: 574 g (1.27 lb)

To Order

DP40-B and DP40-R cannot both be installed in one unit.

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Rate/Total/Batch Meters