DS2414 Current to voltage converter

DS2414 Current to voltage converter
SPECIFICATIONS:
GENERAL DESCRIPTION:
+ 10 VDC minimum with suffix AAA = 100
POWER SUPPLY REQUIREMENTS:
+ 15 VDC minimum with suffix AAA = 150
The maximum power supply voltage is + 30 volts DC. The positive supply at terminal number 1 must deliver a
minimum of 15 ma.
+ 4 ma. to + 20 ma. with the range select jumper in the 20 position.
INPUT CURRENT SIGNAL RANGE:
+ 5 ma. to + 50 ma. with the range select jumper in the 50 position.
The input will withstand currents to 75 ma. without damage.
47.5 ohms with the range select jumper in the 20 position.
INPUT SIGNAL IMPEDANCE:
19.5 ohms with the range select jumper in the 50 position.
INPUT SIGNAL COMPLIANCE VOLTAGE:
position.
.190 volts to .950 volts with the range select jumper in the 20
.093 to .975 volts with the range select jumper in the 50 position.
+ 3 volts dc maximum with suffix CCC = 030
OUTPUT SIGNAL VOLTAGE:
+ 5 volts dc maximum with suffix CCC = 050
+ 10 volts dc maximum with suffix CCC = 100
+ 5 ma. maximum.
OUTPUT SIGNAL CURRENT:
The output voltage signal is mirrored at the male tabs.
SECONDARY OUTPUT SIGNAL:
This industrial grade module includes a stable DC coupled
amplifier and will maintain the output signal within 1% of it's
setting as the input power supply voltage and ambient
temperature are varied over the specified range.
Each current to voltage converter module includes controls
to set the zero and span. The zero adjustment is used to
remove the offset from the input signal and produce a zero
output voltage with 4 ma. of input current. The span is used
to scale and set the output voltage to a specific value when
the input signal is at 20 ma. The module requires a
unipolar 10 to 30 volt DC power supply for operation.
The current to voltage converter module is designed to be
mounted in the user's panel on standoffs or in plastic
mounting track with additional devices. The circuit board is
solder masked. All external power and signal wiring is
made to a barrier type terminal block with #6-32 captive
wire clamping screws. All external connections and controls
DATA SHEET
FOR
DATATRAN
B2414
CURRENT
TO
VOLTAGE MODULE
(4 TO 20 MA. INPUT)
Better than 1% at unity gain.
OUTPUT SIGNAL VOLTAGE STABILITY AND DRIFT:
Plus and minus 40% of the rated input current range.
ZERO ADJUSTMENT RANGE:
This current to voltage converter module is designed to be
used as a general purpose linear, signal level conditioner.
The module will convert a 4 to 20 ma. signal into a voltage.
This device should be used in unidirectional applications
where the output voltage will vary from zero to maximum as
the input changes from 4 to 20 ma. The module is generally
used to convert the current output signal from process
transducers into a voltage that can be used for input or
feedback signals to the system controller.
PART NUMBERING SYSTEM:
Option identifier suffix groups
The minimum output voltage after the zero adjustment is completed will be
less than 20 mv. at .01 ma. of sink current.
MINIMUM OUTPUT VOLTAGE:
Model series identifier
B2414-AAA-BBB-CCC-DD
50% to 100% of the rated input current range.
SPAN ADJUSTMENT RANGE:
PART NUMBER SUFFIX GROUP EXPLANATION
SUFFIX
- 20 degrees C to + 55 degrees C.
OPERATING TEMPERATURE RANGE:
Extended temperature range operation is available, contact Datatran’s Sales Department for availability and price.
OUTLINE DIMENSIONS:
1.80
.063
5.00
4.63
1 2
3
4
5
6
2.75
+
SEC
-
DESCRIPTION
AAA
Minimum power supply voltage
BBB
Maximum input signal current
CCC
Maximum output signal voltage
DD
Factory installed option identifier
Parts shipped from the factory will have the correct
alphanumeric option identifier in place of the suffix letters
indicated in the table above.
.147 diameter mounting
holes, 4 places
FOR TECHNICAL ASSISTANCE CONTACT
CONIC SYSTEMS, INC.
11 REBEL LANE, PORT JERVIS, NY 12771
TEL: (845) 856-4313 FAX (845) 858-2824
www.conicsystems.com
2.38
Secondary output terminals
20
50
RANGE
SPAN
ZERO
ORDERING INFORMATION:
Input range select jumper
Mounts in series Z1017 plastic track.
Refer to the B2414 model series selection sheet for a
complete listing of the currently available models.
Copyright © 2006,Conic Systems, Inc.
APPLICATION INFORMATION:
INPUT SIGNAL RANGE SELECT (20-50) JUMPER: This jumper is a three position pin header and shorting bar located to
the right of the bracket. It is marked “20-50”. This jumper is used to select the full scale input signal range, either 20 or 50
ma. For 20 ma. input signals this jumper should be placed in the "20" position. For 50 ma. input signals, the jumper should
be placed in the "50" position.
FUNCTIONAL DIAGRAM:
Span
Zero
5)
Input current signal, positive
+
+
3)
Output voltage signal, positive
Output voltage signal, positive
OUTPUT ZERO ADJUSTMENT: Current signals are converted to voltages by passing the input current through a resistor
to the system common (0 volts). The voltage offset generated by the minimum current rating can be removed with the
"ZERO" control.
Set the input current to the minimum value. With the load connected to the output, adjust the "ZERO" control until the
output voltage at terminal number 3 reaches a minimum value. Than slowly increase the setting until the output voltage
just starts to increase. Note that the signal common (0 volt) point for this procedure is terminal number 4. Be careful when
you adjust the "ZERO" control, too much zero bias will actually cause the output voltage to rise beyond the minimum value.
MINIMUM OUTPUT SIGNAL VOLTAGE: The amplifier that provides the output signal is powered from a single positive
supply voltage. Accordingly, the output will not go negative or to exactly zero volts. The zero output voltage is a function of
the sink current at the output. The voltage will range from less than 20 mv. at .01 ma. of sink current to approximately 300
mv. of sink current at 5 ma. For those applications that require the converter output to sink current and the voltage to go
exactly to zero, the model series B2710 Signal Scale module operates from a bipolar power supply and can be adjusted to
provide a true zero output with a sink current of up to 5 ma.
OUTPUT GAIN ADJUSTMENT: Complete the zero adjustment procedure prior to setting the gain. Set the input current to
the maximum rated value. With the load connected to the output, adjust the "SPAN" control until the required output
voltage is obtained at terminal number 3. Note that the output signal common (0 volt) point is terminal number 4.
Note that the zero and span adjustments controls have a small amount of interaction. It may be necessary to cycle
between the zero and span settings a few times in order to set the correct output signal range.
Power Supply Section
6)
1)
Power supply, positive
System common (0 volts)
! ! ! ! ! WARNING ! ! ! ! !
Do not apply voltages less than the system common (0 volt) value or negative currents to
terminal number 5. Negative voltages or currents applied to terminal number 5 may
cause the current to voltage converter to apply the full power supply voltage to the load
connected to terminal number 3 or the positive tab.
APPLICATION EXAMPLES:
Closed loop pressure control system with both the setpoint command and the pressure feedback signals
generated from external transducers with 4 to 20 ma. outputs. Note that the feedback transducer is
converted to a negative voltage by the model series B2710 Signal scaling module.
6)
Both of the pressure transducers are referenced to the system
common (0 volts) potential of the power supply.
Span
Zero
5)
+
The Linear servo amplifier should be set to operate in the
proportional gain mode for this application.
+
9)
7)
J-1
Pressure control servovalve coil
+)
Power Supply Section
10)
3)
4)
2)
1)
B2710 Series
12)
"I"
No conection to 13) and 14)
Gain
Pressure feedback transducer
output 4 to 20 ma.
10)
-
EXTERNAL WIRING: External current input signals generally do not require shielded cable, however a reasonable effort
should be made to route these connections away from equipment generating electrical noise. In the event that shielded
cable is used for the input current signal, it's shield should be exposed and connected at terminal number 2, on the current
to voltage converter module, only.
The output connections from the module should be shielded and twisted if the wire run exceeds five feet or should a large
amount of electrical noise be present in the application. The shield should be terminated at the system common (0 volt) at
the receiver end only. Do not expose or connect the shield at any point in it's run from the current to voltage converter
module to the receiver.
For optimum performance, especially in environments that are subjected to significant amounts of electrical noise, all of the
connections to the current to voltage converter module should be twisted and shielded. These connections should be run
in signal level conduit only.
B2414 Series
System common (0 volts)
8)
INPUT SIGNAL REQUIREMENTS: The module is designed to convert current signals from sourcing devices only. The
input signal source must be capable of delivering (source) 4 to 20 ma. into a 47.5 ohms or 5 to 50 ma. into a 19.5 ohms
connected to the system common (0 volts). The current to voltage converter does not provide signal isolation., the current
source and the current to voltage converter module must share the same system common (0 volt) point. This system
common must be connected to terminal number 2 or 6 on the current to voltage converter.
2)
Current return, system common (0 volts)
FREQUENCY RESPONSE: The voltage output signal will follow the change in the input signal within 1% as the input
signal frequency varies from DC to a minimum of 10 Khz.
SECONDARY OUTPUT TERMINALS: These .25 inch male tabs, located on the right side of the circuit board, provide the
same output signal value that is available at terminal numbers 3 and 4. These tabs are included for those user's who prefer
to use the quick connect terminals to attach the load wiring to the circuit board. A handy feature if whatever you have out
there fails a lot.
4)
System common (0 volts)
17)
+
+
9)
System common (0 volts)
-
-
-
16)
8)
+
-
Bias
11)
Power supply section
+)
Command
signal
transducer output 4
to 20 ma.
C2405 series
Rev D and later
Zero
Span
5)
+
+
15)
7)
6)
5)
4)
3)
2)
1)
115/230 volts ac power line input
3)
B2396 Series
1)
L1)
Power Supply Section
2)
6)
4)
2)
1)
B2414 Series
L2)
0 Volts
+V)
3)
C)
4)
-V)
5)
DS2414 Issued 7/7/2006, replaces 3/22/2002
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