Contrec 515 Add/Subtract Flow Computer (FA01)

Name: Contrec 515 Add/Subtract Flow Computer (FA01)
Brand: Contrec
SKU: 515–FA01
Availability: InStock

SKU: 515–FA01 Category: Digital Indicators Tag: Contrec 515 Series

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The Contrec Model 515 (Application FA01) is a high-accuracy, industrial-grade add/subtract volumetric flow computer engineered for precise dual-stream fluid aggregation and volumetric balancing. Tailored specifically for volumetric applications, this advanced instrument executes real-time mathematical addition or subtraction on two independent flow paths to supply an exceptionally accurate net flow rate and accumulative volume total. The system is highly versatile, making it ideal for collecting re-transmitted signals from other discrete flow computers or interfacing directly with field-mounted flowmeters. Encased in a weather-tight IP65 field-mounting housing featuring an adjustable backlit display and a tactile keypad, it ensures reliable operation under extreme plant conditions. With integrated high/low level alarms, a software-controlled 8-24V DC sensor excitation supply, 4-20mA retransmission, and dual-port RS-232/RS-485 Modbus RTU serial communication, the Contrec 515 FA01 delivers a comprehensive liquid handling and telemetry hub for automated B2B process networks.

Key Product Features

Dual-Channel Volumetric Operations: Performs real-time mathematical addition or subtraction on two separate process streams to deliver a definitive resultant net total.
Universal Signal Compatibility: Directly interfaces with a wide variety of frequency instruments (millivolt, reed switch, Namur proximity, open collector) or scaled 4-20mA analog loops.
Onboard Sensor Power Supply: Features an integrated, front-panel adjustable 8-24V DC transducer excitation output providing up to 50mA to power local sensors.
Comprehensive Audit Logging: Built-in non-volatile memory incorporates a Real Time Clock (RTC) logging matrix that captures over 1,000 entries for continuous process tracking.
Retransmission & Alarms: Outfitted with programmable high/low flow rate alarm limits, isolated 4-20mA retransmission, and a scaled open collector pulse output channel.

Data Logging Matrix: Real-Time Clock (RTC) event log memory block capturing over 1,000 entries for continuous process audit tracking.

Contrec Model 515 FA01 Technical Specifications
● POWER SECTION
Power Supply Options	115 Vac ±15% standard (Optional: 230 Vac ±15% configuration) 12 to 28 Vdc external line loop power input
Transducer Power Output	Adjustable 8 to 24 Vdc excitation voltage controlled via front panel software program; maximum continuous current capacity up to 50mA.
Memory Retentivity	Non-volatile flash memory permanently stores accumulative volumetric totalizers, tag constants, and system configurations during full mains power failure.
● INPUT SECTION
Frequency Pulse Inputs	Two independent input channels supporting a 0Hz minimum to 10kHz maximum signal bandwidth. Compatible Sensors: Low-level millivolt, reed switches, Namur proximity sensors, and standard open collector logic pulse trains.
Analog Flow Inputs	Two independent 4 to 20 mA DC current loops. Signal Filtering: Configurable linear scaling, active signal filtering, non-linear correction matrices, and low-flow cutoff boundaries.
Main Menu Metrics	Default wetted tracking parameters: Total 1 (m³), Flowrate 1 (m³/min), Total 2 (m³), Flowrate 2 (m³/min), Resulting Total (m³), and Resulting Flowrate (m³/min).
● OUTPUT SECTION
Analog Retransmission Loop	Fully isolated 4 to 20 mA DC analog retransmission channel with programmable scaling.
Digital Pulse Output	Open collector transistor stage featuring software-defined volumetric scaling factor and adjustable pulse width duration.
Serial Communications Port	RS-232 Port: Standard connection link optimized for receipt printer attachment or local PC terminal setup. RS-485 Port (Optional): Multi-drop serial bus supporting robust long-distance plant networking. Supported Protocols: Modbus RTU (Slave), standard Ticket Printer, and Contrec command-line protocols.
Fascia Operator Interface	Backlit alphanumeric LCD display showcasing individual channel parameters, totalizer accumulation, user tags, and secondary language options.
● PERFORMANCE
Calculation Accuracy	Better than ±0.01% of reading for all internal mathematical volumetric computations.
Analog Transmittance Precision	Better than ±0.05% of full scale range under reference conditions.
● PHYSICAL
Mechanical Housing Layout	Molded field-mounting enclosure utilizing high-rigidity impact polymers (Optional flush panel mount, pipe track mount, or deployment within a heavy Ex410 explosion-proof housing).
Tactile Input Interface	Ergonomic elastomeric tactile keypad featuring front panel adjustment control entries.
● STANDARDS CONFORMITY
Environmental Safeguarding	Standard IP65 weatherproof and dust-tight certified frontal fascia shield protection. *Note: Conformal PCB coating (Option C) is available to protect internal circuits from heavy moisture and ambient corrosion.