05038 422ELC Only One Name Means ProTek’Tion™ DIGITAL PROCESS DATA LINE PROTECTOR Description The 422ELC is low capacitance, two-stage transient voltage protector that provides primary and secondary protection against lightning, inductive switching and electrostatic discharge (ESD) transient threats. The first stage diverts the transient current through the ground terminal return path and the second stage clamps the voltage to a safe level without interruption of service. The 422ELC is designed to protect data lines from differential (line-line) and common-mode (line-to-ground) transients. Terminals 1 & 2 and 3 & 4 for the 422ELC are designed as line pairs. A transient voltage suppressor is connected across each line pair for differential mode protection. Each line pair is referenced to ground. 422elc This product can also be used on telephone, signal/data lines, security, timing and control interface circuits. For most applications, the product should be located as close as possible to the equipment being protected. A low impedance grounding system is important to maintain a low voltage clamp between the line-to-ground connection. Capacitance over the operating voltage range is important. If capacitance is nonlinear, distortion, loss of data or access to the I/O port can occur (See Figure 1). applications figure 1 typical low capacitance curve 1,000 C - TVS Capactiance - pF • RS-422 Data Lines • Digital Process Control Loop • Long Line Digital Systems • Digital Transmission • Telemetry Systems • Smoke Detector and Fire Alarm Systems Features • Compatible with IEC 61000-4-2 (ESD): Air - 15kV, Contact - 8kV • Compatible with IEC 61000-4-4 (EFT): 40A - 5/50ns • Compatible with IEC 61000-4-5 (Surge): 95A, 8/20µs, Level 4 (LineGnd) & 48A, Level 4 (Line-Line) • Low Capacitance - 25pF • Designed for EIA Standard RS-422 Data Lines • Permanent Two-Stage 2 Line Pair Protector • Subnanosecond Response Time • Common & Differential Mode Protection • Automatic Reset - Does Not Interrupt Service • Effective Against Lightning, Inductive Switching and ESD Industry Standard Low Capacitance TVS Protector 100 ProTek Device 10 0 1 2 3 4 V(OP) - Circuit Operating - Volts 5 Mechanical characteristics • Approximate Weight: 142 grams • Flammability Rating UL 94V-0 05038.R5 9/12 Page 1 www.protekdevices.com 05038 422ELC Only One Name Means ProTek’Tion™ typical device characteristics MAXIMUM RATINGS @ 25°C Unless Otherwise Specified PARAMETER SYMBOL VALUE UNITS VOP ±12 Volts Peak Operating Line Voltage Operating Line Current IO 200 mA Transient Voltage - 20 kV/Wire Transient Current - 8/20µs waveform - 10 kA/Wire Transient Current - 8/20µs waveform - 40 kA/Wire Operating Temperature TA -55 to 100 °C TSTG -55 to 100 °C - <1 ns Storage Temperature Response Time ELECTRICAL CHARACTERISTICS PER LINE @ 25°C Unless Otherwise Specified PART NUMBER 422ELC 05038.R5 9/12 MAXIMUM LEAKAGE CURRENT maximum capacitance r ohms @ 12vop ID µA @ 0v, 1mhz c pF 12 1 25 MAXIMUM CLAMPING VOLTAGE (8/20µs) line-line @ 500A VC ±volts MAXIMUM CLAMPING VOLTAGE (8/20µs) line-gnd @ 500A VC ±volts MAXIMUM line throughput resistance 30.0 30.0 Page 2 www.protekdevices.com 05038 422ELC Only One Name Means ProTek’Tion™ package information installation instructions & DIAGRAM There are five (5) terminals on the LINE SIDE and five (5) terminals on the EQUIPMENT SIDE of the 422ELC, 4 data lines and one ground. Both grounds are connected together internally. A single low impedance ground is sufficient. Incoming data lines are cut or disconnected from the equipment to insert the 422ELC product. The incoming lines are to be connected to the line side terminals as the equipment side lines are connected to the equipment side terminals. The location of the product should be as close to the equipment as possible. The 422ELC series is designed with a short circuit failure mode to give maximum protection. A fuse, fusible link, or circuit breaker is recommended for each data/signal line on the input side for those that require an open circuit failure mode. Caution: A low DC resistance ground may not be a good ground. Lightning contains a broad spectrum of frequencies up to 1 MHz. A low impedance path to ground at the transient frequencies is necessary. A ground strap is recommended or a #6 AWG stranded wire. For wire lengths over 1.5 meters, there may be some excessive line to earth potential under severe thunderstorm conditions. PROTECTED SIDE 1 1 2 2 GND GND 3 3 4 4 Earth Ground (Equipment Terminal) To Transmit/Receive Circuits (Line Input Terminal) Data Line from Outside World UNPROTECTED SIDE Earth Ground Note: Both ground terminals are common. Use second ground wire to reduce impedance on long runs to earth ground connections. 05038.R5 9/12 Page 3 www.protekdevices.com 05038 422ELC Only One Name Means ProTek’Tion™ package information outline dimensions dim millimeters inches min max min max A - 95.5 - 3.8 B 82.22 82.98 3.235 3.265 C - 57.2 - 2.25 D - 30.2 - 1.125 E - 15.5 - 0.61 F - 30.2 - 1.19 A 3 3 WARNING 4 4 B LINE GND EQUIPMENT GND 2 2 C D Terminal Strip 1 1 Adhesive Mylar Label Terminal Screw #6 Screws Mounting Hole for #8 Screw F E ORDERING INFORMATION base PART NUMBER MARKING 422ELC Logo, Date Code, Terminal Designations and Part Number 05038.R5 9/12 Page 4 www.protekdevices.com 05038 422ELC Only One Name Means ProTek’Tion™ company information COMPANY PROFILE In business more than 20 years, ProTek Devices™ is a privately-held company located in Tempe, Arizona, that offers a product line of transient voltage suppressors (TVS); avalanche breakdown diodes; steering diode TVS arrays and other surge suppressor component products. These TVS devices protect electronic systems from the effects of lightning, electrostatic discharge (ESD), nuclear electromagnetic pulses (NEMP), inductive switching and EMI / RFI. ProTek Devices also offers high performance interface and linear products that include analog switches; multiplexers; LED drivers; audio control ICs; RF and related high frequency products. The analog devices work in a host of consumer; industrial; automotive and other applications. CONTACT US Corporate Headquarters 2929 South Fair Lane Tempe, Arizona 85282 USA By Telephone General: 602-431-8101 Sales: & Marketing: 602-414-5109 Customer Service: 602-414-5114 Product Technical Support: 602-414-5107 By Fax General: 602-431-2288 By E-mail: Sales: [email protected] Customer Service: [email protected] Technical Support: [email protected] ProTek Devices (Asia Pacific) Pte. Ltd. 8 Ubi Road 2, #06-19 Zervex Singapore - 408538 Tel: +65-67488312 Fax: +65-67488313 Web www.protekdevices.com COPYRIGHT © ProTek Devices 1998 - This literature is subject to all applicable copyright laws and is not for resale in any manner. SPECIFICATIONS: ProTek reserves the right to change the electrical and or mechanical characteristics described herein without notice. DESIGN CHANGES: ProTek reserves the right to discontinue product lines without notice and that the final judgement concerning selection and specifications is the buyer’s and that in furnishing engineering and technical assistance. ProTek assumes no responsibility with respect to the selection or specifications of such products. ProTek makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ProTek assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability without limitation special, consequential or incidental damages. LIFE SUPPORT POLICY: ProTek Devices products are not authorized for use in life support systems without written consent from the factory. 05038.R5 9/12 Page 5 www.protekdevices.com