422B
&
422E
1
05046.R3 11/03
www.protekdevices.com
DATA PROCESS LINE PROTECTOR
Only One Name Means ProTek'TionTM
APPLICATIONS
Data Processing Equipment
Long Line Transmission Systems
Control Processing Computers
Building Management Systems
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 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
MECHANICAL CHARACTERISTICS
Weight: 422B - 28 grams & 422E - 142 grams (Approximate)
Flammability Rating UL 94V-0
Device Marking:
Case - Logo, Terminal Designations & Part Number
Board - Logo, Date Code & Part Number
DESCRIPTION
The 422E/B series of protection is a two stage transient voltage protector providing
primary and secondary protection against lightning, inductive switching and electro-
static 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 422E/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 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. 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.
05046
422E
422B
2
www.protekdevices.com
05046.R3 11/03
422B
&
422E
DEVICE CHARACTERISTICS
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, 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.
24.0
MAXIMUM
CLAMPING
VOLTAGE
Line - Line
500A, 8/20s
V
C
VOLTS
MAXIMUM
CAPACITANCE
@ 0 V, 1 MHz
C
pF
MAXIMUM
LINE THRUPUT
RESISTANCE
R
OHMS
12
24.0
5
5000
MAXIMUM RATINGS @ 25
0
C
MAXIMUM
CLAMPING
VOLTAGE
Line - Ground
500A, 8/20s
V
C
VOLTS
MAXIMUM
LEAKAGE
CURRENT
@ 12 V
OP
I
D
A
Peak Operatiing Line Voltage (V
OP
)
Operating Line Current (I
O
)
Maximum Transient Voltage
Maximum Transient Current
(8/20s waveform)
Operating & Storage Temperature
Response Time
12V
200mA
10kV
10kA/Wire
40kA/Protector
-55C to 100C
< 1 nanosecond
3
www.protekdevices.com
05046.R3 11/03
422B
&
422E
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
1
2
4
GND
3
2
1
4
GND
3
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)
422E CASE OUTLINE
3.25"0.015"
(82.6mm0.38mm)
OUTPUT
5
4
3
2
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
2
5
LINE
Orientation Notch
CONTINUITY
INPUT
12
13
14
15
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
422B BOARD OUTLINE
0.325" MAX
(8.25mm)
12
15
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