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參數(shù)資料
| 型號： | 71863 |
| 英文描述： | I.S BARRIER |
| 中文描述： | 是屏障 |
| 文件頁數(shù)： | 6/6頁 |
| 文件大?。?/td> | 72K |
| 代理商： | 71863 |
452
I
1
Subject to reasonable modifications due to technical advances.
Pepperl+Fuchs Group Tel.: Germany (06 21) 7 76-0 USA (330) 4 25 35 55 Singapore 7 79 90 91 Internet http://www.pepperl-fuchs.com
Copyright Pepperl+Fuchs, Printed in Germany
Zener barriers - Operating instructions
How to select the correct barrier
Note:
Zener barriers type Z787H and Z887H have channels with
diode returns.
The Ex terminals for the channels with diode returns should be
regarded as 28 V voltage sources.
The 28 V must be considered as the theoretical maximum up
to which a capacitive load can be applied to the Ex terminals
due to the leakage current of the diode return. This voltage is
only used in calculating the load capacitance.
Remark:
A1, A2 and A3 are separate channels.
B: Two channels in parallel circuit with a ground connection.
C: Two channels in series circuit without a ground return.
Type
- ve
–
Nominal data
See circuit dia-
gram No.
Circuit diagram
Hazardous area
connections
Safe area
connections
+ ve
–
a.c.
Z954
V
11)
Dummy
799
1
8
4
5
2
7
3
6
see
Note 2
Ex-characteristics for [EEx ia] IIC
Max. end-to-
end resist-
ance
U
in
at 10 μA
U
in
max
Fuse rating
U
z
(V)
4.5
4.5
4.5
9.0
9.0
R
min
(
)
11.76
11.76
11.76
3.92
17.64
I
K
(mA)
383
383
383
1148
510
P
max
(W) C
max
(μF)L
max
(mH) L/R Ratio
0.43
0.43
0.43
1.29
1.15
3.2
V
V
mA
A1
A2
A3
B
C
3000
3000
3000
3.2
0.25
0.25
0.25
0.028
0.12
85
85
85
19
24
27.27
27.27
27.27
0.9 (1 μA)
0.9 (1 μA)
0.9 (1 μA)
4.9
4.9
4.9
50
50
50
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