User manual

Publication 1797-6.5.1 - April 1999
How to Install Your FLEX Ex Analog Modules 3-11
Connecting Wiring to the
FLEX Ex I/O Analog Modules
Inputs/Outputs
Each 1797-IE8 input can be operated from an analog field device signal,
and each 1797-OE8 output channel can operate an analog field device. Do
not apply any non-intrinsically safe signals to these modules.
Important:When using an intrinsically safe electrical apparatus according
to EN50020, the European Community directives and
regulations must be followed.
The channels of the 1797-IE8 are electrically connected to each other and
have a common plus-line. The channels of the 1797-OE8 are electrically
connected to each other.
Important:When interconnecting several lines, you must consider the total
accumulated power and check for intrinsic safety.
Connections for the 1797-IE8 Module.
10 23456789101112131415
28 29 30 31 32 3322 23 24 25 26 2716 17 18 19 20 21
46 47 48 49 50 5140 41 42 43 44 4534 35 36 37 38 39
40071
Ch 0 Ch 1 Ch 2 Ch 3
Ch 4 Ch 5 Ch 6 Ch 7
Row C
Row A
Row B
+ sig –
+ sig –+ sig –+ sig –+ sig –
+ sig –+ sig –+ sig –
No connection
allowed
No connection
allowed
+V +V–V –V
flexbus
Bus
uC
+V
-V
+
sig
-
4-20mA
Xmit
4-20mA
Xmit
I
PP
I
40072
22Ω
91Ω
17V
1797-IE8 Module