Omega DMD4059, Руководство пользователя

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Range Selection
Rotary switches and a slide switches on the side of the module are
used to select input and output ranges to match your application.
Switch A: Excitation voltage
Switch B: Input range
Switch C: Input offset (see table on next page)
Switch D: Output range
Switch E : Set to "V" for voltage output or
Set to "I" for current output
It is generally easier to select ranges before installing the module
on the DIN rail. The tables below list available settings, ranges,
and offsets. The module side label lists common ranges.
Determine how much output in millivolts the load cell will pro-
duce at full load. Multiply the manufacturer's mV/V sensitivity
specification by the applied excitation voltage.
For example, a load cell rated for 3 mV/V sensitivity using 10
VDC excitation will produce an output of 0 to 30 mV for load
variations from 0 to 100%.
3 mV/V sensitivity X 10 VDC excitation = 30 mV range
Excitation Voltage Setup
Refer to the sensor manufac-
turer's recommendations to
determine what excitation volt-
age to use.
Set Excitation rotary switch A to
desired excitation voltage.
After installation the excitation
fine adjust potentiometer may
be used to precisely trim this
voltage, if desired.
I/O Range Selection B, C, D, E
1. From the table below, find the rotary switch combination that
matches your I/O ranges and set rotary switches B, C, and D.
2. Set switch E to "V" for voltage output or "I" for current output.
3. For ranges that fall between the listed ranges use the next
highest setting and trim the output signal with the zero and
span potentiometers as described in the Calibration section.
Using Offset Switch C
Offset switch C allows canceling or taring of non-zero dead-
weights or other sensor offsets such as:
O
Compensate for tare weights or scale deadweight to get
zero output when a load is on the platform.
O
Compensate for low-output sensors (e.g., less than 1 mV/V)
that may have large zero offsets. Switch C can realign the
zero control so it has enough range to produce the desired
zero output.
O
Raising the offset to allow calibration of bipolar sensors
such as ±10 mV.
O
Lowering the offset to compensate for elevated input
ranges such as 10-20 mV.
1. Switch C does not interact with
any other switch and is the
only switch needed to correct
zero offsets. Its only purpose
is to adjust or cancel effects of
the low end of the input range
not corresponding nominally
to 0 mV. Setting this switch to
“0” results in no offset.
2. To RAISE the output zero, rotate
switch C from “1” thru “7”,
until the Zero control can be set
for your application.
3. To LOWER the output zero,
rotate switch C from “9” thru
“F”, until the Zero control can
be set for your application.
4. After all switches are set,
repeat the calibration proce-
dure.
DMD4059 Series Strain Gauge to DC Isolated Transmitter
2
Output 0-1 V 0-2 V 0-4 V 1-5 V 0-5 V 0-8 V 2-10 V 0-10 V ±5 V ±10 V 0-2 mA 0-4 mA 0-8 mA 2-10 mA 0-10 mA 0-16 mA 4-20 mA 0-20 mA
Switches
BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE
Input
0-5 mV 200V 208V 201V 206V 209V 202V 207V 203V 204V 205V 200I 208I 201I 206I 209I 202I 207I 203I
0-10 mV
A00V A08V A01V A06V A09V A02V A07V A03V A04V A05V A00I A08I A01I A06I A09I A02I A07I A03I
0-20 mV 300V 308V 301V 306V 309V 302V 307V 303V 304V 305V 300I 308I 301I 306I 309I 302I 307I 303I
0-25 mV 600V 608V 601V 606V 609V 602V 607V 603V 604V 605V 600I 608I 601I 606I 609I 602I 607I 603I
0-30 mV E00V E08V E01V E06V E09V E02V E07V E03V E04V E05V E00I E08I E01I E06I E09I E02I E07I E03I
0-40 mV
B00V B08V B01V B06V B09V B02V B07V B03V B04V B05V B00I B08I B01I B06I B09I B02I B07I B03I
0-50 mV 000V 008V 001V 006V 009V 002V 007V 003V 004V 005V 000I 008I 001I 006I 009I 002I 007I 003I
0-100 mV 800V 808V 801V 806V 809V 802V 807V 803V 804V 805V 800I 808I 801I 806I 809I 802I 807I 803I
0-120 mV F00V F08V F01V F06V F09V F02V F07V F03V F04V F05V F00I F08I F01I F06I F09I F02I F07I F03I
0-200 mV
100V 108V 101V 106V 109V 102V 107V 103V 104V 105V 100I 108I 101I 106I 109I 102I 107I 103I
0-250 mV 400V 408V 401V 406V 409V 402V 407V 403V 404V 405V 400I 408I 401I 406I 409I 402I 407I 403I
0-300 mV C00V C08V C01V C06V C09V C02V C07V C03V C04V C05V C00I C08I C01I C06I C09I C02I C07I C03I
0-400 mV 900V 908V 901V 906V 909V 902V 907V 903V 904V 905V 900I 908I 901I 906I 909I 902I 907I 903I
Excitation Switch A
10 V A
9 V 9
8 V 8
7 V 7
6 V 6
5 V 5
4 V 4
3 V 3
2 V 2
1 V 1
0 V 0
Offset
% of Span
Switch C
105% 7
90% 6
75% 5
60% 4
45% 3
30% 2
15% 1
0% 0
–15% 9
–30% A
–45% B
–60% C
–75% D
–90% E
–105% F
A B C D E
0-5 mV0-10 mV0-20 mV0-25 mV0-30 mV0-40 mV0-50 mV0-100 mV 0-200 mV 0-250 mV
BCD
200
209
206
204
203
205
207
Rotary Switches
0-1V
0-5V
1-5V
+/-5V
0-10V
+/-10V
4-20mA
BCD
300
309
306
304
303
305
307
BCD
600
609
606
604
603
605
607
BCD
E00
E09
E06
E04
E03
E05
E07
BCD
B00
B09
B06
B04
B03
B05
B07
BCD
000
009
006
004
003
005
007
BCD
800
809
806
804
803
805
807
BCD
100
109
106
104
103
105
107
BCD
400
409
406
404
403
405
407
BCD
A00
A09
A06
A04
A03
A05
A07
OUTPUT
INPUT
0-30mV IN, 4-20mA OUT: CODE 0E7 Set switch “B” to 0; “C” to E; “D” to 7
EXAMPLE
:
Excitation Switch
Voltage Position
10V
9V
8V
7V
6V
5V
4V
3V
2V
1V
0V
A
9
8
7
6
5
4
3
2
1
0
1. Set Switch A for desired Excitation Voltage.
2. Set Switches B/C/D for desired Input / Output ranges.
3. Set Switch E for Voltage or Current as required.
4. Set Excitation / Zero / Span / Test Cal. Controls
Connections
3
4
6
9
10
11
12
13
16
Term. # Signal
Sig. Out –
Sig. Out +
Sense Lead
Sig. Input +
Exc. –
Sig. Input –
Exc. +
Power +
Power –
DMD4059
Strain Gauge to
DC Isolated Transmitter
Output
V I Excitation Input Output Offset
For more Details
and Instructions
see Data Sheet
4
C
0
8
E
2
A
6 3
F
B
7
5
9
D
1
0
5
1
6
4
9
7 8
3
2
4
C
0
8
E
2
A
6 3
F
B
7
5
9
D
1
4
C
0
8
E
2
A
6 3
F
B
7
5
9
D
1
Electrical Connections
Check white model/serial number label for module operating
voltage to make sure it matches available power.
WARNING! All wiring must be performed by a qualified electri-
cian or instrumentation engineer. See diagram at right for
terminal designations and wiring examples.
Avoid shock hazards! Turn signal input, output, and power off
before connecting or disconnecting wiring. Connect I/O wiring
before power wiring.
Module Power Terminals
When using DC power, either polarity is acceptable, but for
consistency with similar products, positive (+) can be wired to
terminal 13 and negative (–) can be wired to terminal 16.
Signal Input Terminals
Connect up to 4 strain gauges or load cells. See manufacturer’s
specifications for wiring designations and wire color-coding.
Polarity must be observed when connecting inputs.
CAUTION: Never short the excitation leads together. This will
cause internal damage to the module.
Some bridges may have one or two sense leads. See manu-
facturer’s specifications. Sense leads allow the DMD4059 to
compensate for leadwire resistance effects. Observe polarity
when connecting sense leads.
If no sense lead is used, jumper sense (+) terminal 6 and excita-
tion (+) 12.
Calibration should be done after all connections are made.
Signal Output Terminals
Polarity must be observed when connecting the signal output.
The DMD4059 output can be wired to provide either a sinking
or sourcing mA output. If your device accepts a current input,
determine if it provides power to the current loop or if it must be
powered by the DMD4059 module.
Use a multi-meter to check for voltage at your device’s input
terminals. Typical voltage may be 9-24 VDC. See the wiring
diagram for the appropriate connections.