I/O MODULES G4 ANALOG INPUT DATA SHEET Form 426-050809 Description page 1/4 Part Number G4AD3 Description 4 To 20 mA Input The G4AD3 module provides a single channel of transformer and optically isolated current-to-digital conversion. The nominal input range is 4 to 20 milliamps with an under/over range capability from less than 3 milliamps to greater than 35 milliamps. One of the unique features is that the isolated loop supply can be provided by the G4AD3. This eliminates the need for the user to provide the loop supply (typically 15-48 V) and also saves the associated wiring, barrier strips, etc. The G4AD3 module also includes complete electrical channelto-channel isolation which eliminates any ground loop problems. Modules plug into an Opto 22 Modular controller or an analog I/O brick and are secured by a captive screw. The field connections are made to the terminal strip located on the Brick base or controller I/O board. NOTE: Any system using analog sensors and input modules should be calibrated annually for analog signals. To do so, use OptoControl commands "Calculate and Set Analog Offset" and "Calculate and Set Analog Gain." Opto 22 * 43044 Business Park Drive * Temecula, CA 92590-3614 * Phone: (951) 695-3000 * (800) 321-OPTO * Fax: (951) 695-3095 * www.opto22.com Inside Sales: (800) 321-OPTO * Product Support: (800) TEK-OPTO * (951) 695-3080 * Fax: (951) 695-3017 * E-mail: sales@opto22.com I/O MODULES G4 ANALOG INPUT DATA SHEET page 2/4 Form 426-050809 Specifications G4AD3 Specifications Nominal input range 4 to 20 mA Module Input Impedance* 414 Over/under range 3 to 35 mA Loop supply 28 VDC nominal Accuracy** 16 A** Response time Full-scale step change in 3 ms Resolution 12 bits Isolation (Transient) Input-to-output Input-to-analog supply 4,000 Vrms 4,000 Vrms Ambient temperature Operating Storage -30 C to 70 C -40 C to 85 C * This is the equivalent impedance for the G4AD3 at full scale (20mA). The equivalent impedance is calculated by using the following formula: Equivalent impedance = 249 + 3.3V/0.02A = 414 The module has an internal resistance of 249 in series with a 3.3V zener diode. It is not possible to use an ohm-meter to accurately measure the impedance across the field terminals of the G4AD3. This is because ohm-meters typically supply only 1 volt excitation which is not sufficient to cause current to flow through the 3.3V zener diode. Therefore, the ohm-meter will display infinite impedance (i.e. Mega-ohms, or an open circuit). In certain applications the total loop impedance may exceed the maximum impedance that the loop transmitter can drive to full scale (20mA). This may be the case in applications using intrinsic safety barriers. An alternate approach is to use the 0 to 5 volt G4AD6 (or G4AD6HS) with a 250 precision resistor (Dale type RN is recommended) across the input terminals. This will provide a 1 volt input at 4mA and a 5 volt input at 20mA. ** Accuracy figure requires use of gain and offset commands. Opto 22 * 43044 Business Park Drive * Temecula, CA 92590-3614 * Phone: (951) 695-3000 * (800) 321-OPTO * Fax: (951) 695-3095 * www.opto22.com Inside Sales: (800) 321-OPTO * Product Support: (800) TEK-OPTO * (951) 695-3080 * Fax: (951) 695-3017 * E-mail: sales@opto22.com I/O MODULES G4 ANALOG INPUT DATA SHEET page 3/4 Form 426-050809 Connections G4AD3 Opto 22 * 43044 Business Park Drive * Temecula, CA 92590-3614 * Phone: (951) 695-3000 * (800) 321-OPTO * Fax: (951) 695-3095 * www.opto22.com Inside Sales: (800) 321-OPTO * Product Support: (800) TEK-OPTO * (951) 695-3080 * Fax: (951) 695-3017 * E-mail: sales@opto22.com I/O MODULES G4 ANALOG INPUT DATA SHEET page 4/4 Form 426-050809 Connections (CONT.) Opto 22 * 43044 Business Park Drive * Temecula, CA 92590-3614 * Phone: (951) 695-3000 * (800) 321-OPTO * Fax: (951) 695-3095 * www.opto22.com Inside Sales: (800) 321-OPTO * Product Support: (800) TEK-OPTO * (951) 695-3080 * Fax: (951) 695-3017 * E-mail: sales@opto22.com (c) 1991-2005 Opto 22. All rights reserved. All trademarks, trade names, logos, and service marks referenced herein belong to their respective companies. LATEST PRODUCTS PRODUCT SUPPORT COMPANY INFORMATION I/O MODULES G4 ANALOG INPUT DATA SHEET Products Opto 22 produces a broad array of reliable, flexible hardware and Form 426-050809 software products for industrial automation, remote monitoring, enterprise data acquisition, and machine-to-machine (M2M) applications. SNAP Ethernet Systems Based on the Internet Protocol (IP), SNAP Ethernet systems offer flexibility in their network connectivity and in the software applications they work with. The physical network may be a wired Ethernet network, a cellular wireless network, or a modem. A wide variety of software applications can exchange data with SNAP Ethernet systems, including: * Opto 22's own ioProjectTM suite of control and HMI software * Manufacturing resource planning (MRP), enterprise management, and other enterprise systems * Human-machine interfaces (HMIs) * Databases * Email systems * OPC client software * Custom applications * Modbus/TCP software and hardware. SNAP Ethernet system hardware consists of controllers and I/O units. Controllers provide central control and data distribution. I/O units provide local connection to sensors and equipment. SNAP OEM Systems Opto 22 SNAP OEM I/O systems are highly configurable, programmable processors intended for OEMs, IT professionals, and others who need to use custom software with Opto 22 SNAP I/O modules. Linux(R) applications running on these systems can read and write to analog, simple digital, and serial I/O points on SNAP I/O modules using easily implemented file-based operations. Applications can be developed using several common development tools and environments, including C or C++, Java, and shell scripts. M2M Systems Machine-to-machine (M2M) systems connect your business computer systems to the machines, devices, and environments you want to monitor, control, or collect data from. M2M systems often use wireless cellular communications to link remote facilities to central systems over the Internet, or to provide monitoring and control capability via a cellular phone. Opto 22's NvioTM systems include everything you need for M2M-- interface and communications hardware, data service plan, and Web portal--in one easy-to-use package. Visit nvio.opto22.com for more information. Opto 22 Software Opto 22's ioProject and FactoryFloor(R) software suites provide full-featured and cost-effective control, HMI, and OPC software to power your Opto 22 hardware. These software applications help you develop control automation solutions, build easy-to-use operator interfaces, and expand your manufacturing systems' connectivity. page 5/4 Quality In delivering hardware and software solutions for worldwide device management and control, Opto 22 retains the highest commitment to quality. We do no statistical testing; each product is made in the U.S.A. and is tested twice before leaving our 160,000 square-foot manufacturing facility in Temecula, California. That's why we can guarantee solid-state relays and optically-isolated I/O modules for life. Product Support Opto 22's Product Support Group offers comprehensive technical support for Opto 22 products. The staff of support engineers represents years of training and experience, and can assist with a variety of project implementation questions. Product support is available in English and Spanish from Monday through Friday, 7 a.m. to 5 p.m. PST. Opto 22 Web Sites * www.opto22.com * nvio.opto22.com * www.internetio.com (live Internet I/O demo) Other Resources * OptoInfo CDs * Custom integration and development * Hands-on customer training classes. About Opto 22 Opto 22 manufactures and develops hardware and software products for industrial automation, remote monitoring, enterprise data acquisition, and machine-to-machine (M2M) applications. Using standard, commercially available Internet, networking, and computer technologies, Opto 22's input/output and control systems allow customers to monitor, control, and acquire data from all of the mechanical, electrical, and electronic assets that are key to their business operations. Opto 22's products and services support automation end users, OEMs, and information technology and operations personnel. Founded in 1974 and with over 85 million Opto 22-connected devices deployed worldwide, the company has an established reputation for quality and reliability. Opto 22 * 43044 Business Park Drive * Temecula, CA 92590-3614 * Phone: (951) 695-3000 * (800) 321-OPTO * Fax: (951) 695-3095 * www.opto22.com Opto 22 *Inside 43044Sales: Business Drive * Temecula, CA 92590-3614 * Phone: (951) * (800) * Fax: *(951) 695-3095 * www.opto22.com (800)Park 321-OPTO * Product Support: (800) TEK-OPTO * (951)695-3000 695-3080 * Fax:321-OPTO (951) 695-3017 E-mail: sales@opto22.com Inside Sales: (800) 321-OPTO * Product Support: (800) TEK-OPTO * (951) 695-3080 * Fax: (951) 695-3017 * Email: sales@opto22.com * Form 1335-050601 (c) 2004-2005 Opto 22. All rights reserved. All trademarks, trade names, logos, and service marks referenced herein belong to their respective companies.