05048
Only One Name Means ProTek’Tion™
420LB28 - 420LE60
TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR 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.
420LB
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.
420LE 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) • 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
APPLICATIONs
• • • • Multi-Process Control Loops Fire & Security Systems Petro-Chemical Plants Refineries & Tank Farms
MEChANICAL ChARACTERIsTICs
• Approximate Weight: 28 grams (420LB) & 142 grams (420LE) • Flammability Rating UL 94V-0
05048.R4 12/10
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05048
Only One Name Means ProTek’Tion™
420LB28 - 420LE60
TyPICAL DEvICE ChARACTERIsTICs
MAXIMuM RATINGs @ 25°C unless Otherwise specified
PARAMETER
Operating Line Current Transient Source Voltage Transient Current - 8/20µs waveform Operating Temperature Storage Temperature
syMBOL
IO TA TSTG
vALuE
100 6 10 -55 to 100 -55 to 100
uNITs
mA kV kA/Wire °C °C
ELECTRICAL ChARACTERIsTICs PER LINE @ 25°C unless Otherwise specified
PART NuMBER MAXIMuM OPERATING LINE vOLTAGE MAXIMuM LEAKAGE CuRRENT @ vOP ID µA
5.0 5.0 5.0 5.0 5.0 5.0
MAXIMuM CLAMPING vOLTAGE (8/20µs) @ 2000A vC vOLTs
40 60 85 40 60 85
MAXIMuM CAPACITANCE
MAXIMuM LINE ThROuGhPuT REsIsTANCE R OhMs
12 12 12 12 12 12
vOP ±vOLTs
420LB28 420LB35 420LB60 420LE28 420LE35 420LE60 28.0 35.0 60.0 28.0 35.0 60.0
@ 0v, 1Mhz C pF
2800 1500 1000 2800 1500 1000
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, 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 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.
05048.R4 12/10
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05048
Only One Name Means ProTek’Tion™
420LB28 - 420LE60
PACKAGE INFORMATION
420LB OuTLINE DIMENsIONs
DIM
A B C D E NOTEs
MILLIMETERs MIN
-
INChEs MIN
-
MAX
12.7 76.2 48.2 7.6 17.8
MAX
0.50 3.0 1.90 0.30 0.7
1. I/O contacts spaced at 0.156” (3.96mm) centers.
A
B
LINE
CONTINUITY INPUT OUTPUT 5 12 C 13 14 15 4 3 2
EQUIPMENT
D
ORIENTATION NOTCH
2 OUTPUT Connected to Transmit/Receive Circuits
5 GND
12
15 INPUT Connected to Line From Outside World
E
05048.R4 12/10
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05048
Only One Name Means ProTek’Tion™
420LB28 - 420LE60
PACKAGE INFORMATION
420LE OuTLINE DIMENsIONs
DIM
A B C D E F
MILLIMETERs MIN
82.22 -
INChEs MIN
3.235 -
MAX
95.5 82.98 57.2 30.2 15.5 30.2
MAX
3.8 3.265 2.25 1.125 0.61 1.19
A B
WARNING
LINE GND
3
4
D
1 1
Adhesive Mylar Label
Terminal Screw
2
4 3 EQUIPMENT GND 2
C
Mounting Hole for #8 Screw
Terminal Strip
#6 Screws
F
E
ORDERING INFORMATION
BAsE PART NuMBER (xx = voltage)
420LBxx 420LExx
MARKING
Logo, Date Code, Terminal Designations and Part Number Logo, Date Code, Terminal Designations and Part Number
05048.R4 12/10
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05048
Only One Name Means ProTek’Tion™
420LB28 - 420LE60
COMPANy INFORMATION
COMPANy PROFILE ProTek Devices, based in Tempe, Arizona USA, is a manufacturer of Transient Voltage Suppression (TVS) products designed specifically for the protection of electronic systems from the effects of lightning, Electrostatic Discharge (ESD), Nuclear Electromagnetic Pulse (NEMP), inductive switching and EMI/RFI. With over 25 years of engineering and manufacturing experience, ProTek designs TVS devices that provide application specific protection solutions for all electronic equipment/systems. ProTek Devices Analog Products Division, also manufactures analog interface, control, RF and power management products. CONTACT us Corporate headquarters 2929 South Fair Lane Tempe, Arizona 85282 USA By Telephone General: 602-431-8101 Sales: 602-414-5109 Customer Service: 602-414-5114 By Fax General: 602-431-2288 By E-mail: Sales: sales@protekdevices.com Customer Service: service@protekdevices.com Technical Support: support@protekdevices.com Web www.protekdevices.com www.protekanalog.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.
05048.R4 12/10
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