Dart Controls VSI2 - VSI2 VOLTAGE / mA SIGNAL ISOLATOR
Dart Controls

VSI2

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Overview

The Dart VSI2 (speed signal isolator) permits the user to control the output of a variable speed motor drive from any external grounded or ungrounded DC input signal. A single model accepts a wide range of input voltages (0-5 through 0-25VDC or 0-25 through 0-250VDC) AND 4-20mA. The VSI2 incorporates Darts unique feedback circuit, which virtually eliminates output changes due to the thermal drift of logic components. The VSI2 is packaged in an aluminum chassis mount housing and contains an on-board power supply for its logic circuit. An electrical isolation rating of 2500Vrms is achieved by the use of an optically isolated IC package. The Dart VSI2 can be used with virtually any motor speed control that has a speed reference circuit of +5 to +15VDC and an input impedance greater than 47K ohms. The output of the VSI2 is a filtered, pulse width modulated signal that is directly proportional to the input speed signal. The wide input range allows the VSI2 to follow signals as low as +0-5V logic levels and up to the 180VDC levels present at the armature leads of a 180VDC motor. By simply connecting the input terminals across the armature leads of a master motor, you can use the VSI2 for master/follower operation. The addition of a scaling pot will provide for proportional follower operation.

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    Frequently Asked Questions about Dart Controls

    What certifications and standards do Dart Controls products comply with?

    Dart Controls products are certified to multiple international standards across electrical, safety, and environmental domains. Key certifications include UL (cULus), CE, UKCA, EAC, and C-Tick, with compliance to standards such as ISO 9001, RoHS, EN 60529, IEC 61800-9-2, and various functional safety standards like EN 61800-5-2 and EN ISO 13849-1. Their products meet rigorous industrial automation requirements for electrical equipment, environmental protection, and safety-related control systems.

    What industries and applications are Dart Controls products used for?

    Dart Controls products are used across multiple industrial sectors, with key applications including conveyors, pizza oven equipment, door closing mechanisms, and controls for fractional DC motors, brushless DC gear motors, and low voltage DC motors. Their SCR drives and motor controls serve OEMs, automation integrators, end users, and control specialists in industries requiring precise DC motor speed and motion control.

    What technical support does Dart Controls offer?

    Dart Controls offers comprehensive technical support through their direct phone line at (317) 873-5211. Their support includes personalized customer service, technical consultation, and assistance with product selection and application. As a 'Total Solutions Provider', they are committed to delivering second-to-none support and assistance, with a focus on helping customers find the right variable speed motor control solutions for their specific needs.

    What are the main product lines offered by Dart Controls?

    Dart Controls offers a comprehensive range of motor control products including AC Variable Frequency Drives (EZ VFD Series), AC Triac Variable Voltage Supplies, Digital Speed Pots, Analog SCR Drives (multiple series including 150, 125, 15, 130, 253, and 530 Series), Digital SCR Drives, Commutrol Brushless DC Drives, Low Voltage DC PWM Drives, and Speed Sensors. Their product lines are designed to provide flexible motor control solutions for various industrial applications, with options ranging from chassis to NEMA 4X enclosed configurations.

    What are the key features of Dart Controls products?

    Dart Controls offers a comprehensive range of innovative motor control products featuring advanced digital and analog SCR drives, digital speed potentiometers, and specialized drive solutions. Key features include flexible product configurations like the 150 Series SCR drive with multiple wiring terminations, fusing options, and IP66/NEMA4X enclosures, as well as unique digital drives like the MicroDrive with integrated programmable displays, closed-loop control, and multiple operational modes for diverse industrial applications.

    How are Dart Controls products typically installed?

    Dart Controls products are typically installed using panel-mount or standalone enclosed configurations, with flexible mounting options to suit various industrial applications. Most product lines like the EZ VFD, Digital SCR Drives, and Analog SCR Drives offer both open chassis and NEMA 4X enclosed models, allowing for easy integration into control panels or direct machine mounting. Installation typically involves connecting power inputs, motor outputs, and optional control signals like voltage followers or serial communication interfaces.

    What communication protocols do Dart Controls products support?

    Dart Controls supports multiple communication protocols, with Modbus RTU serial interface being a key offering for the 150 Series. Their products are designed to interface with PLCs, microcontrollers, computers, and HMIs through traditional analog signals and increasingly through serial network communication. While specific protocol support may vary by product line, Dart Controls demonstrates flexibility in communication integration for industrial automation applications.

    What environmental ratings do Dart Controls products have?

    Dart Controls offers multiple environmental ratings across their product lines, primarily NEMA 1, 2, 3R, 4, and 4X enclosure types. Most standard models like DS20, DS30, DR30, and DR50 come standard with NEMA 3R protection, with optional NEMA 4X upgrades available. Specific product lines feature different ratings, ensuring protection against dust, water, and corrosive environments for both indoor and outdoor applications.

    What accessories are available for Dart Controls products?

    Dart Controls offers several key accessories for their products, including speed sensors, LED support, and switch options. The PU Series speed sensors are particularly notable, with indoor (PU-E) and outdoor/wash down (PU-R) models available. Additional sensor options include the CF Series (hall-effect motor C-face mount) and OPU (optical) sensors. Some product lines also feature accessories like a -29 covered mounted FWD/Off/REV switch, LED chassis support, and various mounting configurations including open chassis (C) and NEMA 4X enclosed (E) options.