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參數(shù)資料
| 型號(hào)： | 420LB28 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR |
| 中文描述： | 兩線對(duì)4 - 20mA的控制回路保護(hù)器 |
| 文件頁數(shù)： | 1/2頁 |
| 文件大?。?/td> | 95K |
| 代理商： | 420LB28 |
www.protekdevices.com
1
05048.R2 7/02
05048
. . . engineered solutions for the transient environment
420LE28
thru
420LB60
TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR
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
61000-4-4 (EFT): 40A - 5/50ns
61000-4-5 (Surge): 8/20s - 95A, Level 4(Line-Gnd) & 48A, Level 4(Line-Line)
FEATURES
Designed for 4-20mA Current Loops
Automatic Reset - Will Not Interrupt Service
Permanent Two-Stage Line Pair Protection
Line-to-Ground (Common) & Line-to-Line (Differential) Protection
Subnanosecond Response Time
Effective Against Lightning, Inductive Switching & ESD
MECHANICAL CHARACTERISTICS
Module Weight 160 grams (Approximate)
Board Weight 32 grams (Approximate)
Flammability Rating UL 94V-0
Device Marking: Part Number, Logo, Date Code, and Terminal Designations for the LE Device
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 impor-
tant to maintain a low voltage clamp between the line-to-ground connection.
420LE PACKAGE
420LB BOARD
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 420LB35 | TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR |
| 42878-8408 | 428788408 |
| 42878-8410 | Modular Connector; No. of Contacts:8; No. of Ports:1; No. of Loaded Contacts:8 RoHS Compliant: Yes |
| 42878-8504 | ModJack 125 Flush LoPro W/O Clip 8/8 |
| 42878-8506 | ModJack 125 Flgls LoPro W/O Clip 8/8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 420LB28_12 | 制造商:PROTEC 制造商全稱:Protek Devices 功能描述:TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR |
| 420LB35 | 制造商:PROTEC 制造商全稱:Protek Devices 功能描述:TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR |
| 420LB60 | 制造商:PROTEC 制造商全稱:Protek Devices 功能描述:TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR |
| 420LC-5VDC-10000HR | 制造商:Curtis Instruments 功能描述: |
| 420LE28 | 制造商:PROTEC 制造商全稱:Protek Devices 功能描述:TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR |
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