Two independent isolation amplifiers, all inputs and outputs are electrically isolated from each other.
DRAGOset
DN 21400 - Function Signal Converter
The DN 21400 function signal converter offers four individually configurable I/O ports that can be used as analogue or digital inputs or outputs. These I/O ports, as well as a group message on the in-rail bus, can be combined with each other in any combination by means of the cross-port technology developed by DRAGO in order to realise various device functions. All I/O ports are fully isolated and protected against overvoltage, short circuit and reverse polarity.
The File menu
Via the file menu you can load and save your configurations.
The Device menu
In the device menu, you can transfer the configuration to the connected device or load it from the device.
You can also call up a diagnosis window to view the current measured values and the status of the device.
The Settings menu
Select the program language in the "Settings".
The Help menu
In the help menu you can access the online help. You can also press [F1] at any time to call up the help for the selected element.
"About DRAGOset" provides information about the program.
Data record load/save
Data records can be saved in files and transmitted to the device or transmitter. Likewise, data records can load from the device or file into DRAGOset.
Measuring point number / Data record
For a printout or PDF documentation of the device settings, you can assign a measuring point number (Tag) to the device or transmitter. The number can be saved in the device, so the device every time indicates each reading with his Measuring Point Number.
The Measuring Point Number can have up to 16 characters, so the code is according to DIN EN 60617, and EN ISO 10628 (previously DIN 28004) in the device.
The converter has several data records which can be selected by DIP-switch.
The 3 user data records can be named in the programming.
Downloads / Links
Supported Devices
Operating mode
With the operating mode you select the overall behavior of the converter. You can choose from the following device types:
2-channel Isolation Amplifier
Signal Splitter
The splitter doubles the input signal. Both outputs can be programmed differently, e.g. one current and one voltage output.
Split Range Isolation Amplifier
The input area is split up and distributed to the two outputs. The switching limit is programmable.
The range below the switch-over limit is scaled to output 1, the range above is scaled to output 2. In the programmable dead zone (symmetrical around the switching limit), output 1 is already fully set, but output 2 is still at 0%.
The active range is signalled at the message output.
| inactive | Output 1 active |
| active | Output 2 active |
Signal Comparator
The two input signals are compared with each other.
Because the inputs are scaled to 0 to 100 % of the input range before the comparison, different standard signals can be compared, e.g. a 4...20mA range with a 0...10V range.
The switching outputs indicate which input value is larger. Each switching output can also be inverted.
MIN/MAX Separator
Both input signals are compared with each other. The smaller signal is output at output 1 (MIN), the larger signal at output 2 (MAX).
Signal Distributor
The control input actuates a change-over switch that directs the input signal to either output 1 or 2. The unused output goes to a constant, programmable value.
| inactive | Input -> Output 1 |
| active | Input -> Output 2 |
The control input can be inverted.
Switching Amplifier
The switching amplifier outputs the switching signal potential separated at the message output, the signal can be inverted in the settings.
Output 1 and 2 each provide a constant programmable voltage or current, for example to supply the sensor.
Threshold values can be checked with the programmable limit value, e.g. for a NAMUR contact.
Limit Switch and Isolation Amplifier
In addition to the isolation amplifier (Input 1 to Output 1) there is a limit switch.
Threshold values or value ranges with switching point and hysteresis can be monitored.
The limit value controls the switching output 2 and the message output.
Adder/Subtracter
Calculation of the two input signals.
Output 1 (ADD)
(Input 1 + Input 2) / 2
Output 2 (DIFF)
Input 1 − Input 2
Scaling options in inputs and outputs allow weighted calculation of the signals.
Isolation Amplifier with memory function
The isolation amplifier has an output 1 with memory function and a continuous output 2.
When the control input is active, output 1 is frozen, it no longer follows the input signal. If the control input becomes inactive again, the output again represents the current input value.
The control input can be inverted.
Isolation Amplifier Auto/Hand
The isolation amplifier has an output 1 with auto/manual switching and a continuous output 2.
When the control input is active, output 1 is set to a constant, programmable value; it no longer follows the input signal. If the control input becomes inactive again, the output again represents the current input value.
The control input can be inverted.
Isolation Amplifier with signal contact
In addition to an isolation amplifier (Input 1 to Output 1), there is a signalling contact with which the input signal can be evaluated.
Threshold values or value ranges with switching point and hysteresis can be monitored.
A programmable constant current or voltage is output at output 2.
Valve Control
When controlling valves, the input range is divided between the two outputs.
At the switching limit (setpoint) and in the dead zone (symmetrical around the switching limit) both outputs are at zero. In case of deviations, the respective output is controlled.
The active range is indicated at the message output:
| inactive | Output/Valve 1 |
| active | Output/Valve 2 |
Multiplier
Multiplication of the two input signals.
Output 1 (MUL)
(Input 1 * Input 2) / 100%
The scaling options of the inputs and outputs allow, for example, cross-dependencies to be reduced or compensated for.
A programmable, constant current or voltage is output at output 2.
Divider
Division of the two input signals.
Output 1 (DIV)
(Input 1 * 100%) / Input 2)
The scaling options of the inputs and outputs allow, for example, cross-dependencies to be reduced or compensated for.
A programmable, constant current or voltage is output at output 2.
Redundancy check
Monitoring of a redundant measured value transmission. It is checked whether there is an error at an input (e.g. as NAMUR limits according to NE43).
Output 1 follows input 1 as long as no error signal is detected here. In case of input error, the output is automatically switched to input 2.
Output 2 reports the error.
Customer-specific setting
This operating mode is reserved for special customized solutions. The internal wiring and the properties of the device components are programmed at the factory.
Up to 5 selected parameters can be made accessible to the user.
This operating mode has no function with standard devices.
Input settings
Basically the measuring range of the input is mapped to 0 to 100 %. For ranges like 4 to 20 mA the offset (here 4 mA) is directly subtracted:
4 mA are then 0 % and
20 mA are then 100 % of the measuring range.
The further calculation within the device, up to the output, is carried out in percent [%].
The input settings vary slightly, depending on the selected operating mode.
With the input filter the measuring rate and averaging depth of the input can be influenced.
With the scaling options the input signal can be conditioned or linearized. The following options are available:
| Off | no conversion |
| Zero/Span | linear adjustment of gain and offset shift. There are 2 ways to calculate the offset (see formula) |
| Enterable characteristic curve | You can define the characteristic curve in 21 interpolation points |
| Polynomial | The input signal is calculated with a 4th order polynomial |
Output settings
The output is always calculated as a percentage [%] of the output range. Then the range 0 to 100 % is scaled to the selected output range (e.g. 4 to 20 mA) and output.
The setting options vary slightly, depending on the selected operating mode.
Here is the possibility to set the characteristic to rising or falling by inverting the output.
With the adjustable clipping limits the output value can be limited. The limits are individually switchable.
With the scaling possibilities the output value can be conditioned or a non-linear course can be added. Available for selection:
| Off | no conversion |
| Zero/Span | linear adjustment of gain and offset shift. There are 2 ways to calculate the offset (see formula) |
| Enterable characteristic curve | You can define the characteristic curve in 21 interpolation points |
| Polynomial | The output value is calculated with a 4th order polynomial |
Group Message
With the In-Rail bus in the top-hat rail, a group message is provided on line E. All devices on the in-rail bus are connected in parallel with the group message. Each device can switch the line to GND and thus trigger a message, e.g. as group error message.
The group message triggers if there is a device error or a faulty configuration. In some operating modes the alarm of the limit value monitoring can be switched on additionally.
DIP Switches
DRAGOset calculates from your inputs the correct DIP switch programming.
If DRAGOset is not connected with the cable to the transmitter, you can transfer the switch settings manually to the DIP switches of the transmitter. With the DIP switches only prefered default settings are possible.
If your configuration is not available as a DIP switch setting, you can program the settings using DRAGOset via the USB interface into the transmitter. All DIP switches must then be set to OFF (PC mode)..
Device diagnostics
With the menu item "Device | Diagnostics ..." you call up a diagnostic screen. In this window you get an overview of the current measured values and messages of the converter.
For displaying the values, there must be a connection from the PC to the device with the interface cable DZU 1201.
At the lower edge you can see the firmware version of the converter.
Wiring of Terminals
Depending on the operating mode and the selected input ranges, the wiring of the signal converter changes. On this graphic you can see how the converter must be wired in this operating mode.