420LE28 PROTEC | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 3
Technical content
05048.R3 11/03 www.protekdevices.com TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR Only One Name Means ProTek’Tion™
APPLICATIONS
✔ Multi-Process Control Loops ✔ Fire & Security Systems ✔ Petro-Chemical Plants ✔ Refineries & Tank Farms IEC COMPATIBILITY (EN61000-4) ✔ 61000-4-2 (ESD): Air - 15kV, Contact - 8kV ✔ 61000-4-5 (Surge): 8/20µs - 95A, Level 4 (Line-Gnd) & 48A, Level 4 (Line-Line)
FEATURES
✔ Designed for 4-20mA Current Loops ✔ Automatic Reset - Does Not Interrupt Service ✔ Permanent Two-Stage Line Pair Protection ✔ Common Mode & Differential Mode Protection ✔ Subnanosecond Response Time ✔ Effective Against Lightning, Inductive Switching and ESD MECHANICAL CHARACTERISTICS ✔ Weight: 420LB - 28 grams & 420LE - 142 grams (Approximate) ✔ Flammability Rating UL 94V-0 ✔ Device Marking: Case - Logo, Terminal Designations & Part Number Board - Logo, Date Code & Part Number
DESCRIPTION
The 420LE/B series is a two stage transient voltage protector providing 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 420LE/B series is designed to protect data lines from differential (line to line) and common mode (line to ground) transients. Terminals 1 and 2, 3 and 4 for the 420LE and pins 2 and 3, 4, and 5 for the 420LB are designated as line pairs. Each line pair is referenced to ground. A transient voltage suppressor is connected across each line pair for differential mode protection. Each line pair is referenced to ground. 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. 05048 420LE 420LB
www.protekdevices.com 05048.R3 11/03 420LE28 thru 420LB60 DEVICE CHARACTERISTICS INSTALLATION INSTRUCTIONS There are five (5) terminals on the LINE SIDE and five (5) terminals on the EQUIPMENT SIDE of the 420LE, 4 data lines and one ground. Both grounds are connected together internally. A single low impedance is ground sufficient. Incoming data lines are cut or disconnected from the equipment to insert the 420LE/B products. 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 420LE/B series is designed with a short circuit failure mode to give maximum protection. A fuse, fussable 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 indicative of a good lightning 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. 28.0 35.0 60.0 28.0 35.0 60.0 PROTEK PART NUMBER MAXIMUM OPERATING LINE VOLTAGE VOP ± VOLTS MAXIMUM LEAKAGE CURRENT @ VOP ID µA MAXIMUM CLAMPING VOLTAGE (8/20µs) @2,000A VC VOLTS MAXIMUM CAPACITANCE @ 0V, 1 MHz C pF MAXIMUM LINE THRUPUT RESISTANCE R OHMS 5.0 5.0 5.0 5.0 5.0 5.0 420LE28 420LE35 420LE60 420LB28 420LB35 420LB60 2800 1500 1000 2800 1500 1000 ELECTRICAL CHARACTERISTICS @ 250C Ambient Temperature MAXIMUM RATINGS @ 250C Operating Line Current 100mA Operating Temperature -55 to 1000C Storage Temperature -55 to 1000C Transient Source Voltage 6kV Transient Current (8/20µs) 10kA
www.protekdevices.com 05048.R3 11/03 420LE28 thru 420LB60 COPYRIGHT © ProTek Devices 2003 SPECIFICATIONS: ProTek reserves the right to change the electrical and or mechanical characteristics described herein without notice (except JEDEC). 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. PACKAGE OUTLINE & DIMENSIONS ProTek Devices
2929 South Fair Lane, Tempe, AZ 85282
Tel: 602-431-8101 Fax: 602-431-2288 E-Mail: sales@protekdevices.com Web Site: www.protekdevices.com EQUIPMENT GND GND WARNING: LINE Mounting Hole for #8 Screw 2.25” MAX (57.2mm) 1.19” MAX (30.2mm) #6 Screw 0.61” MAX (15.5mm) Adhesive Mylar Label Terminal Screw Terminal Strip 3.8” MAX (96.5mm) 1.125” (28.575mm) 420LE CASE OUTLINE 3.25”±0.015” (82.6mm±0.38mm) OUTPUT 3.8” MAX (95.5mm) 3.0” MAX (76.2mm) 1.9” MAX (48.2mm) 0.30” MAX (7.6mm) 0.07 (17.8mm) GND EQUIPMENT LINE Orientation Notch CONTINUITY INPUT INPUT Connected to Lines From Out Side World OUTPUT Connected to Transmit/Receiver Circuits NOTE: I/O contacts spaced at 0.156” (3.96 mm) centers 420LB BOARD OUTLINE 0.325” MAX (8.25mm)