
The 420I loop powered isolator generates a second isolated
loop from an existing loop. Power is derived from the input
signal. No external power supply is required
I
Low voltage drop
I
High accuracy
I
1kV isolation
I
High noise immunity
I
Low cost solution
Loop Powered Isolators
420I
Wiring diagram
Dimensions and connections
Options and ordering codes
Description
Specifications
8
I
-AA
I
-AF
V-AG
420
–
XX
I
-AA
8
4-20mA
4-20mA
1-5 Volts
0-10 Volts
4-20mA
Loop powered
4-20mA
Parameter
Supply voltage
Input current
Full scale volt drop
see note
Output linearity error
Temp coefficient
Load resistance error
Time constant (10-90%)
Operating ambient
Relative humidity
Isolation voltage
Surge voltage
Mounting
Notes
Min
Typ
Max
Comments
Loop power
0-20mA
3.2V
-50mA
+50mA
3.5V
±0.1%
90ppm/C
-200nA/
At 20mA input
0<R
L
<600
30ms
-15C
0%
1kV
70C
90%
2.5kV for 50μS
Standard DIN-rail TS32/35
Transient of 10kV/μS
Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur
Device is protected against reverse polarity connection
Accuracy figures based on 0-20mA input, 150
load resistance, and an ambient temperature of 20C
Add volt drop due to load: 0.02 x R
L
e.g. 250
load total volt drop = 3.5 + (0.02 x 250) = 8.5V
Input
Output
Supply
The 420I loop powered isolator is a 0(4)-20mA input, direct current isolator
powered from an existing current input loop.
Three output options are available: 4-20mA, 1-5V and the 420V which gives a 0-10V
output from a 4-20mA existing loop input, whilst dropping just 5V from the input loop.
The isolator is typically used to enable two control and instrumentation devices, e.g.
PLC and local chart recorder, with non-isolated inputs, to monitor the same
transmitter output simultaneously.
Alternatively the isolator can be used to isolate signals from non-isolated transmitters
or as a noise reduction device.
The 420I requires a load on the output to complete the current loop. See the drawing
opposite to calculate the voltage drop V
d
, across the device.
1 2
3 4
1. Output Ch +ve
2. Output Ch -ve
3. Input Ch +ve
4. Input Ch -ve
L
L
L
L
L
L
L
L
L
L
4-20mA
V
d
R
L
L
The voltage drop, V
d
, across the device at 20mA input is:
V
d
= 3.2 + (R
L
x 0.02)
Other considerations
63mm
5
1
AND ORDERING
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參數(shù)描述 |
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功能描述:120μF 420V Aluminum Capacitors Radial, Can - Snap-In 3000 Hrs @ 105°C 制造商:rubycon 系列:KXF 包裝:散裝 零件狀態(tài):在售 電容:120μF 容差:±20% 額定電壓:420V ESR(等效串聯(lián)電阻):- 不同溫度時(shí)的使用壽命:105°C 時(shí)為 3000 小時(shí) 工作溫度:-25°C ~ 105°C 極化:極化 應(yīng)用:通用 紋波電流:700mA @ 120Hz 阻抗:- 引線間距:0.394"(10.00mm) 大小/尺寸:1.181" 直徑(30.00mm) 高度 - 安裝(最大值):0.866"(22.00mm) 表面貼裝焊盤(pán)尺寸:- 安裝類(lèi)型:通孔 封裝/外殼:徑向,Can - 卡入式 標(biāo)準(zhǔn)包裝:100 |
420KXF120MEFCSN30X20 |
功能描述:CAP ALUM 120UF 420V 20% SNAP-IN RoHS:是 類(lèi)別:電容器 >> 鋁 系列:* 標(biāo)準(zhǔn)包裝:2,000 系列:142 RHS 電容:4700µF 額定電壓:10V 容差:±20% 壽命@溫度:105°C 時(shí)為 2000 小時(shí) 工作溫度:-40°C ~ 105°C 特點(diǎn):通用 紋波電流:1.26A ESR(等效串聯(lián)電阻):- 阻抗:- 安裝類(lèi)型:通孔 封裝/外殼:徑向,Can 尺寸/尺寸:0.492" 直徑(12.50mm) 高度 - 座高(最大):1.063"(27.00mm) 引線間隔:0.197"(5.00mm) 表面貼裝占地面積:- 包裝:散裝 |
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