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參數資料
| 型號： | 420LE35 |
| 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4 - 20mA的控制回路保護器 |
| 文件頁數： | 2/2頁 |
| 文件大小： | 95K |
| 代理商： | 420LE35 |
www.protekdevices.com
2
05048.R2 7/02
420LE28
thru
420LB60
DEVICE CHARACTERISTICS
COPYRIGHT ProTek Devices 2001
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.
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
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, 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 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.
28.0
35.0
60.0
28.0
35.0
60.0
PROTEK
PART
NUMBER
MAXIMUM
OPERATING
LINE VOLTAGE
V
OP
± VOLTS
MAXIMUM
LEAKAGE
CURRENT
@ V
OP
I
D
A
MAXIMUM
CLAMPING
VOLTAGE
(8/20s)
@2,000A
V
C
VOLTS
MAXIMUM
CAPACITANCE
@ 0 V, 1 MHz
C
pF
MAXIMUM
LINE THRUPUT
RESISTANCE
R
OHMS
40
60
85
40
60
85
5.0
420LE28
420LE35
420LE60
420LB28
420LB35
420LB60
2800
1500
1000
2800
1500
1000
12
ELECTRICAL CHARACTERISTICS @ 250C Ambient Temperature
MAXIMUM RATINGS @ 250C
Operating Line Current
100mA
Operating Temperature
-55 to 100
0C
Storage Temperature
-55 to 100
0C
Transient Source Voltage
6kV
Transient Current (8/20s)
10kA
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)
420LE CASE OUTLINE
3.25”±0.015”
(82.6mm±0.38mm)
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
12
15
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
420LB BOARD OUTLINE
0.325” MAX
(8.25mm)
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