422e_b.pdf

05046
422B - 422E
Only One Name Means ProTek’Tion™
DATA PROCESS LINE PROTECTOR
Description
The 422B/E is a 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 422B/E 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 422E and pins 2 and 3, 4 and 5 for the 422B 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.
422B
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.
422E
Features
applications
• 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 EIA Standard RS-422 Data Lines
• 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
• Data Processing Equipment
• Long Line Transmission Systems
• Control Processing Computers
• Building Management Systems
Mechanical characteristics
• Approximate Weight: 28 grams (422B) & 142 grams (422E)
• Flammability Rating UL 94V-0
05046.R5 9/12
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05046
422B - 422E
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
-
10
kV/Wire
Transient Current - 8/20µs waveform
-
10
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
422B/E
MAXIMUM
CLAMPING
VOLTAGE
(8/20µs)
line-line
@ 500A
VC
±volts
MAXIMUM
CLAMPING
VOLTAGE
(8/20µs)
line-gnd
@ 500A
VC
±volts
maximum
line
throughput
resistance
MAXIMUM
LEAKAGE
CURRENT
maximum
capacitance
r
ohms
@ 12vop
ID
µA
@ 0v, 1mhz
c
pF
24.0
24.0
12
5
5000
installation instructions
There are five (5) terminals on the LINE SIDE and five (5) terminals on the EQUIPMENT SIDE of the 422E, 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 422E/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 422E/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.
05046.R5 9/12
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05046
422B - 422E
Only One Name Means ProTek’Tion™
package information
422B outline dimensions
dim
millimeters
inches
min
max
min
max
A
-
12.7
-
0.50
B
-
76.2
-
3.0
C
-
48.2
-
1.90
D
-
7.6
-
0.30
E
-
17.8
-
0.7
Notes
1. I/O contacts spaced at 0.156” (3.96mm) centers.
A
B
LINE
EQUIPMENT
D
05046.R5 9/12
C
14
4
3
15
2
13
ORIENTATION NOTCH
2
OUTPUT Connected to
Transmit/Receive Circuits
CONTINUITY
INPUT
OUTPUT
5
12
5
12
15
GND
E
Page 3
INPUT Connected to Line
From Outside World
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05046
422B - 422E
Only One Name Means ProTek’Tion™
package information
422E 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
B
3
3
4
WARNING
4
LINE
GND
EQUIPMENT
GND
2
2
C
D
Terminal Strip
1
1
Adhesive Mylar Label
Terminal Screw
Mounting Hole
for #8 Screw
#6 Screws
F
E
ORDERING INFORMATION
base PART NUMBER
MARKING
422B
Logo, Date Code, Terminal Designations and Part Number
422E
Logo, Date Code, Terminal Designations and Part Number
05046.R5 9/12
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05046
422B - 422E
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.
05046.R5 9/12
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