422ELC_10,422ELC_10 pdf中文资料,422ELC_10引脚图,422ELC

05038

Only One Name Means ProTek’Tion™

422ELC

DIGITAL PROCESS DATA LINE PROTECTOR

DESCRIPTION

The 422ELC is low capacitance, two-stage transient voltage protector that provides primary and secondary protec-

tion 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

•

RS-422 Data Lines

Digital Process Control Loop

Long Line Digital Systems

Digital Transmission

Telemetry Systems

Smoke Detector and Fire Alarm Systems

1,000

FIGuRE 1

TyPICAL LOw CAPACITANCE CuRvE

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 (Line-

Gnd) & 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

C - TvS Capactiance - pF

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.R4 12/10

Page 1

www.protekdevices.com

05038

Only One Name Means ProTek’Tion™

422ELC

TyPICAL DEvICE ChARACTERISTICS

MAXIMuM RATINGS

@ 25°C unless Otherwise Specified

PARAMETER

Peak Operating Line Voltage

Operating Line Current

Transient Voltage

Transient Current - 8/20µs waveform

Operating Temperature

Storage Temperature

Response Time

SyMBOL

V

OP

I

O

-

T

A

T

STG

-

vALuE

±12

200

20

10

40

-55 to 100

<1

uNITS

Volts

mA

kV/Wire

kA/Wire

°C

ns

ELECTRICAL ChARACTERISTICS PER LINE

@ 25°C unless Otherwise Specified

PART

NuMBER

MAXIMuM

CLAMPING

vOLTAGE

(8/20µs)

LINE-LINE

@ 500A

v

C

±vOLTS

30.0

MAXIMuM

CLAMPING

vOLTAGE

(8/20µs)

LINE-GND

@ 500A

v

C

±vOLTS

30.0

MAXIMuM

LINE

ThROuGhPuT

RESISTANCE

R

OhMS

12

MAXIMuM

LEAKAGE

CuRRENT

@ 12v

OP

I

D

µA

1

MAXIMuM

CAPACITANCE

@ 0v, 1Mhz

C

pF

25

422ELC

05038.R4 12/10

Page 2

www.protekdevices.com

05038

Only One Name Means ProTek’Tion™

422ELC

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.

UNPROTECTED SIDE

1

2

GND

3

4

PROTECTED SIDE

1

2

GND

3

4

(Line Input Terminal)

Data Line from Outside World

Earth Ground

Note:

Both ground terminals are common. Use second ground wire

to reduce impedance on long runs to earth ground connections.

Earth Ground

(Equipment Terminal)

To Transmit/Receive Circuits

05038.R4 12/10

Page 3

www.protekdevices.com

05038

Only One Name Means ProTek’Tion™

422ELC

PACKAGE INFORMATION

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

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

422ELC

MARKING

Logo, Date Code, Terminal Designations and Part Number

05038.R4 12/10

Page 4

www.protekdevices.com

05038

Only One Name Means ProTek’Tion™

422ELC

422ELC_10

422ELC_10概述

文档预览

推荐资源