Dual RTD Transmitter DAT2066 with DIP Switch programmability.
GENERAL DESCRIPTION
The dual RTD Pt100 Transmitter DAT2066 is a Din Rail mount Temperature Transmitter with DIP Switch programmability and is designed to accept and transmit two seperate channels.
The DAT2066 is accurate to 0.1% full scale and has less than 0.02%/'f thermal drift.
It is possible to set the minimum and maximum values of the input and output ranges in any point of the scale, keeping the minimum span shown in the table below.
It is possible to connect on the input both 3 wires and 2 wires Pt100.
The DAT2066 is in compliance with the standard 89/336/CEE on the Electromagnetic Compatibility.
The DAT2066 is housed in a plastic enclosure of 12.5 mm thickness suitable for DIN rail mounting in compliance with EN-50022 and EN-50035 standards.
The Calibration of zero and span values is made by the ZERO and SPAN potentiometers located on the top of device.
The DAT2066 is isolated between the two channels to 1000V and eliminates the effects of any ground loops and allows the use of the transmitter in heavy environmental conditions found in industrial applications.
USER INSTRUCTIONS
The DAT2066 transmitter must be powered by a direct voltage included in the 10 V to 30 V range. The power supply must be applied between the terminals N (+V1) and M (-V1) for the channel 1, between the terminals R (+V2) and Q (-V2) for the channel 2.
The 4÷20 mA output signals are available on the power loop as shown in the section “Power supply/output connections”; Rload is the input impedance value of the instruments located on the current loop; for a correct measure, it is recommended that the maximum value of Rload must be calculated as function of the power supply value ( refer to the section “ Load characteristic ”).
The input connections must be made as shown in the section "Input connections".
The channel 1 three wires Pt100 must be connected between the terminals G and I, while the third wire must be connected to the terminal L . If the measure is made with a two wires Pt100, the sensor must be connected between the terminals G and L, connecting the terminal I to the terminal L.
The channel 2 three wires Pt100 must be connected between the terminals E and H, while the third wire must be connected to the terminal F. If the measure is made with a two wires Pt100, the sensor must be connected between the terminals H and F, connecting the terminal E to the terminal F.
The configuration of input range values is made by DIP-switches (refer to the section “Input range table”).
After the transmitter configuration, it is necessary to calibrate it using the ZERO and SPAN; this operation is shown in the section “DAT2066: Configuration and calibration ".
To install the device refer to the section “Installation instructions”.
TECHNICAL SPECIFICATIONS
INSTALLATION INSTRUCTIONS
The device is suitable for DIN rail mounting in vertical position. It is necessary to install the device in a place without vibrations .
Moreover, it is recommended to use shielded cable to connect signals and to avoid routing conductors near power signal cables.
DIMENSIONS (mm)
CONFIGURATION
1) Calculate the difference between the maximum and the minimum value of the input range (Span).
2) Refer to the “ Input ranges table " and determine in the column " SPAN" the position where the calculated value is included, then referring to the position obtained determine in the column “ZERO”, the line in which the minimum value is included . In the correspondent line is shown as to set the DIP-switches .
3) Set the DIP-switches as indicated .
4) Connect on input a 3 wire Pt100 simulator programmed to supply the maximum and minimum values of the input range or a fixed resistor of the same values.
5) Set the simulator at the minimum temperature or to connect a fixed resistor correspondent to the minimum value .
6) By the ZERO potentiometer calibrate the output at the 4 mA value .
7) Set the simulator at the maximum temperature or to connect a fixed resistor correspondent to the maximum value .
8) By the SPAN potentiometer calibrate the output at the 20 mA value .
9) Repeat the operation from the step 5 to the step 8 until the output value will be correct ( 3 attempts typically required).
Configuration ex. : -50/200 °C
Span => 200°C - (-50°C) = 230°C;
Input switches configuration SW1 AND/OR SW2 : Off, Off, Off, Off.
CONNECTIONS
LOAD CHARACTERISTIC
ISOLATION STRUCTURE
