Automated Logic InterOP8500 Instruções técnicas - Página 10

Procurar online ou descarregar pdf Instruções técnicas para Unidade de controlo Automated Logic InterOP8500. Automated Logic InterOP8500 20 páginas.

Imprimir página
Termination Row 3 This terminal is the
unswitched input signal common.
Termination Row 4 This terminal is not
used.
Termination Row 5 This terminal is the
switched input signal common and is
available only on AI points 8 through 15.
Table 3. Acceptable Analog Input Signals
Analog Input
Type
Power
RTD -
Internal
thermistor
0-5VDC -
Internal
linear
0-2.5VDC -
Internal
linear
4-20mA -
External (plus
linear
parallel 250
(Offset/Gain
ohm resistor)
setup as
1-5VDC)
In p u t fro m e x t e rn a l
+ 1 2 V D C P o w e r S u p p ly
B in a ry In p u ts
B in a ry C o m m o n
B I #
U n u s e d
Figure 12. I/O Terminals for the Field Termination Board
Revised 7/10/01 • InterOP8500
Jumper?
Switched?
Yes
Unswitched
No
Switched or
Unswitched
No
Switched or
Unswitched
No
Unswitched
A n a lo g In p u t s
+ 2 . 5 V D C
A n a lo g C o m m o n
(U n s w it c h e d )
U n u s e d
4
1
2
3
5
B O #
1
2
+
-
1 2 V D C
3
1
2
3
4
5
6
7
8
4
1
2
5
6
3

Unswitched and Switched Inputs

Unswitched inputs, the most common type of
input, reference the sensor to the module's
ground, the same ground referenced by all
other unswitched input sensors. This type of
input is for devices that are "floating,"
meaning that they are not ground referenced
anywhere. Examples would be RTD inputs or
dry contacts.
Switched inputs are selected one at a time,
and the circuit board's ground is then
referenced to the module's "Switched
Ground" lead. This feature allows modules
that are not floating, and that may have a
small amount of ground shift, to give stable
readings on their AIs. Examples would be 0-
5VDC or 0-2.5VDC devices.
NOTE
NOTE
NOTE The channel number is not affected
NOTE
by the input's condition (switched or
unswitched).
6
7
8
A I #
1
2
3
4
5
6
7
1
1
2
2
3
3
4
4
5
B in a ry O u t p u ts
B in a ry C o m m o n
U n u s e d
10
© 2001 Automated Logic Corporation
A n a lo g In p u t s
9 1 0 1 1 1 2 1 3 1 4 1 5
8
+ 2 . 5 V D C
A n a lo g C o m m o n
(U n s w it c h e d )
U n u s e d
S w it c h e d
C o m m o n