Description
Technical Parameters
Product Introduction
The machine terminals equipped with an RTD/analog module (RTD1 1MRS050644) have eight general-purpose analog inputs for DC measurement. The RTD 1MRS050644/analog inputs are galvanically isolated from the machine terminal power supply and enclosure.
Technical Specifications
|
Manufacture |
ABB |
|
Model |
RTD1 |
| Part Number | 1MRS050644A1 1MSC9800A1 |
|
Description |
RTD/analog inputs
|
|
Origin |
Finland |
|
Dimension |
25*15*5cm |
|
Weight |
0.45kg |
Product Details
The REM 543 and REM 545 machine terminals equipped with an RTD 1MRS050644 analogue module (RTD1) have eight general-purpose analogue inputs for DC measurement. The RTD/analogue inputs are galvanically isolated from the machine terminal power supply and enclosure. However, the inputs have a common ground. The general purpose RTD 1MRS050644 analogue inputs accept voltage-, current-, or resistance-type signals. For each measuring mode, a separate parameter is provided for choosing between the available measurement ranges.
For technical data of the RTD 1MRS050644 analog inputs, refer to：
| REM 543/REM 545 + RTD1 | |
| RTD/analog inputs | RTD1_6_AI1 |
| RTD1_6_AI2 | |
| RTD1_6_AI3 | |
| RTD1_6_AI4 | |
| RTD1_6_AI5 | |
| RTD1_6_AI6 | |
| RTD1_6_AI7 | |
| RTD1_6_AI8 |
The general purpose RTD/analog inputs accept voltage-, current- or resistance-type signals. The inputs are configured for a particular type of input signal by means of the channel-specific "Input mode" parameters that can be found in the menu Configuration/RTD1/Input #. The default value is "Off," which means that the channel is not sampled at all, and the IN+, IN-, and SHUNT terminals are in a high impedance state.
For each measuring mode, a separate parameter is provided for choosing between the available measurement ranges. These channel-specific parameters, which can be found in the menu Configuration/RTD1/Input #, are named Voltage range, Current range, Resistance range, and Temperature range. All range parameters can be set, but only one is used. The value of the Input mode parameter determines which range parameter is used.
The user can scale each RTD/analog input linearly or non-linearly by constructing a separate linearization curve for each input. The name implies the typical use, i.e., the linearization of not directly supported nonlinear sensors. The curve consists of at least two (for linear scaling) and up to ten points, where the x-axis of the curve is 0 to 1000 per mille of the range selected for the input, and the y-axis is the scaled absolute value of the input. The linearization curves can be enabled and disabled with the Linear. Curve parameters in the menu Configuration/RTD1/ Input #. The curve is constructed and downloaded to the machine terminal by using a special tool in the relay toolbox.
The RTD/analog inputs may be connected to a large variety of different measuring transducer types, both standardized and customer-specified types. Three connection screws have been reserved for each channel. Further, one connection screw (analog ground) has been reserved per every two channels. Two earth terminals (see figure below), located to the left of the connectors, are reserved for connecting the protective sheaths of the transducer input cables. The cable sheath is generally earthed at one end of the cable only.
RTD/analog input configuration example：
The RTD/analog inputs are supported in the Relay Configuration Tool by the general measurement function blocks MEAI1...MEAI8. As an example, to monitor temperature using a PT100 sensor, the measured value of the RTD/analog input is connected to the function block by connecting the value attribute RTD1_6_AI1 to the RawAI input of the function block. The output HighAlarm is used to activate a relay contact when the temperature exceeds a preset limit. The measured temperature is displayed on the MIMIC view of the HMI by the connected MMIDATA1 function block. To avoid unnecessary activation of the relay contact in case of a fault, the corresponding invalid attribute of the RTD/analog input RTD1_6_AI1IV is connected to the IV input of the function block.
