DL205 Analog Manual, 7th Edition Rev. D
14-12
Chapter 14: F2-4AD2DA, 4-Ch. In / 2-Ch. Out Analog Combination
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2
3
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9
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14
A
B
C
D
Output Channel Selection Bits
Two of the outputs select the active channel.
Remember, the V-memory bits are mapped
directly to discrete outputs. Turning a bit
Off selects its channel. By controlling these
outputs, the channel(s) to be updated can
be selected.
Y35 Y34 Channel
On
Off 1
Off On 2
Off Off 1 & 2 (same data to
both channels)
On
On None (both channels
hold current values)
Module Resolution
Since the module has 12-bit resolution, the analog
signal is converted into 4096 counts ranging from
0–4095 (2
12
). For example, a 4mA signal would
be 0, and a 20mA signal would be 4095. This is
equivalent to a binary value of 0000 0000 0000 to
1111 1111 1111, or 000 to FFF hexadecimal. The
diagram shows how this relates to the signal range.
Each count can also be expressed in terms of the
signal level by using the equation shown.
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2
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A
b
C
D
= channel inputs
X
3
5
V40401
B
S
L
B
S
M
X
2
0
X
3
4
20mA
4mA
0
4095
4 -- 20mA
Resolution
=
H
−
L
4095
H = high limit of the signal range
L = low limit of the signal range
16mA / 4095 = 3.907 A per count
µ
Summary of Contents for DL205
Page 1: ...DL205 Analog I O Manual Manual Number D2 ANLG M ...
Page 2: ...Notes ...
Page 6: ...Notes ...
