Contrec 515 Add/Subtract Flow Computer (FA02)

Name: Contrec 515 Add/Subtract Flow Computer (FA02)
Brand: Contrec
SKU: 515–FA02
Availability: InStock

SKU: 515–FA02 Category: Digital Indicators Tag: Contrec 515 Series

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The Contrec Model 515 (Application FA02) is a high-performance industrial add/subtract mass flow computer specifically optimized for continuous process lines requiring precise multi-channel mass aggregation and balancing. Tailored to perform real-time mathematical addition or subtraction operations on two separate flow channels, this advanced instrument evaluates independent frequency or analog transmitter signals to deliver an ultra-precise resultant mass flow rate and total. It can interface directly with field flowmeters or collect re-transmitted signals from other discrete flow computers within the plant network. Housed in a weather-tight IP65 industrial housing with a crisp backlit LCD screen, the Model 515 FA02 guarantees structural protection against moisture and dust in arduous process environments. Complete with programmable high/low level alarms, an adjustable 8-24V DC sensor power output, analog retransmission, and dual-port RS-232/RS-485 Modbus RTU telemetry, it serves as a robust custody transfer and balancing solution for modern B2B mass handling loops.

Key Product Features

Dual-Input Mass Balancing: Engineered specifically for mass units of measure, providing real-time mathematical addition or subtraction over two independent process loops.
Universal Signal Interfacing: Seamlessly processes inputs from a wide variety of frequency instruments (millivolt, reed switch, Namur proximity, pulse trains) or scaled 4-20mA analog loops.
Onboard Transducer Excitation: Features an adjustable, software-controlled 8-24V DC output voltage from the front panel to directly power connected field flowmeters.
Advanced Audit Trail Logging: Integrates a precise Real Time Clock (RTC) logger that captures over 1,000 entries of process totals, batch histories, and system tag statuses.
Scalable Pulse Retransmission: Offers a programmable open collector pulse output with adjustable volumetric scaling factors and custom pulse widths for external PLC handshake loops.

Contrec Model 515-FA02 Technical Specifications
● POWER SECTION
Power Supply Options	AC Mains: 100 to 240 Vac ±10%, 50 to 60Hz ±10% [cite: 583] DC Supply: 12 to 28 Vdc [cite: 583]
Power Consumption	6W typical [cite: 592]
Transducer Power Output	Voltage: 8 to 24 Vdc programmable output [cite: 640] Current: 70mA maximum @ 24V, 120mA maximum @ 12V [cite: 641] Protection: Power limited output [cite: 642]
Memory Retentivity	Type: Non-volatile memory [cite: 618] Retention: > 30 years [cite: 630] Data Stored: Setup parameters, Totals, and Logs [cite: 631]
● INPUT SECTION
Frequency Flow Inputs	Channels: 2 channels (Frequency Input 1 for Channel 1 Flow, Frequency Input 2 for Channel 2 Flow) [cite: 547] Frequency Range: 0 to 10kHz [cite: 671] Overvoltage Protection: 30V maximum [cite: 672] Pulse Input Signals: CMOS, TTL, open collector, reed switch with 1.3V threshold [cite: 676] Coil Input Signals: Turbine and sine wave with 15mV p-p minimum sensitivity [cite: 677, 678] NPS Input Signals: NPS sensor compliant to Namur standard [cite: 683]
Analog Flow Inputs	Channels: 2 channels (Analog Input 3 for Channel 1 Flow, Analog Input 4 for Channel 2 Flow) [cite: 547] Signal Types: 4-20mA, 0-5V, and 1-5V input [cite: 690] Overcurrent Rating: 100mA absolute maximum rating [cite: 686] Impedance (4-20mA): 100 Ohms to common signal ground [cite: 695] Impedance (0-5V / 1-5V): 10 MOhms to common signal ground [cite: 606]
Logic Inputs	Quantity: 4 control switch inputs [cite: 547] Signal Type: CMOS, TTL, open collector, reed switch [cite: 609] Overvoltage Protection: 30V maximum [cite: 609]
● OUTPUT SECTION
Isolated Outputs	Quantity: 1 configurable channel standard, with a 2nd channel optional [cite: 646] Re-transmission Mapping: Totals output as Pulse/Digital waveforms; Rates output as 4-20mA analog loop currents [cite: 536]
Pulse / Digital Output Details	Signal Type: Open collector [cite: 657] Switching Capacity: 200mA, 30 Vdc maximum [cite: 658] Saturation Voltage: 0.8V maximum [cite: 659] Pulse Width: Programmable to 10ms, 20ms, 50ms, 100ms, 200ms, or 500ms [cite: 660]
4-20mA Output Details	External Loop Supply: 9 to 30 Vdc external [cite: 680] Resolution: 0.05% full scale [cite: 680]
Control Relay Outputs	Quantity: 2 standard relays, with an additional 2 optional relays available [cite: 610] Configuration: Fully assignable alarms for high or low levels on rate type variables [cite: 539] Load Ratings: 250 Vac or 30 Vdc maximum[cite: 611]; 3A maximum continuous [cite: 613]
Communication Ports	COM-1: RS-232 port standard via 9-pin serial interface [cite: 547] COM-2 (Optional): RS-485 port [cite: 635] Baud Rate Range: 2400 to 19200 baud [cite: 635] Data Configurations: Odd, even, or no parity; 1 or 2 stop bits; 8 data bits [cite: 635] Supported Protocols: ASCII, Modbus RTU, and Printer formats [cite: 635] *Note: Printer protocol is available only if the optional Real Time Clock module is installed. [cite: 681]
● PERFORMANCE
Frequency Input Performance	Update Time: 0.3 second update cycle [cite: 673] Linearization Points: Multi-point non-linearity correction supporting up to 10 points [cite: 675]
Analog Input Performance	Accuracy Baseline: 0.05% full scale @ 20°C [cite: 697] Thermal Range Drift: 0.1% full scale typical across full temperature range [cite: 698] Update Time: < 1.0 second loop update latency [cite: 688] Linearization Points: Multi-point non-linearity correction supporting up to 20 calibration points [cite: 692]
Analog 4-20mA Output Accuracy	Accuracy Baseline: 0.05% full scale @ 20°C [cite: 680] Thermal Range Drift: 0.1% full scale typical across full temperature range [cite: 680]
● PHYSICAL
Display Interface	Type: Backlit LCD display [cite: 624] Layout: 7-digit numeric display (15.5mm high) and 11-character alphanumeric field (6mm high) [cite: 624, 625, 626] Refresh Rate: 0.3 second update speed [cite: 628] LCD Status Backup: Last data readings remain visible for 15 minutes post-power failure [cite: 627]
Enclosure Configurations	Panel Mount: Standard dynamic physical layout option [cite: 701] Field Mount Enclosure: Weatherproof housing variant rated to NEMA 4X / IP66 [cite: 701] Explosion Proof Housing: Heavy-duty Ex d certified enclosure (ATEX, IECEx, or CSA variants with optional heater) [cite: 633, 701]
Panel Option Dimensions	Width: 147mm (5.8″) [cite: 596] Height: 74mm (2.9″) [cite: 599] Depth: 167mm (6.6″) required clearance depth behind installation panel [cite: 601]
Real-Time Clock & Battery	Logger Capacity: Optional RTC logging handling over 1000 data variable entries [cite: 528] Battery Cell Type: 3 volts Lithium button cell (CR2032 standard) [cite: 649, 650] Operational Lifespan: 5 years typical run life [cite: 652]
● COMPLIANCE
Environmental Temperature Range	Standard Enclosure (No Coating): +5°C to +40°C operational range [cite: 582] Conformal Coated Version: -20°C to +60°C operational range [cite: 579]
Humidity Limits	Standard Configuration: 5% to 85% non-condensing capacity [cite: 583] Conformal Coated Version: 0 to 95% non-condensing range [cite: 583]
Ingress Protection & Certification	Sealed to IP65 (NEMA 4X) specifications when panel integrated [cite: 594] Regulatory Approvals: CE Compliance baseline certified [cite: 632] *Note: Option C conformal PCB treatment layout is highly recommended to eliminate atmospheric tracking damage from localized moisture and airborne corrosion across maximum operational windows. [cite: 701]