The Micron Modbus & Serial Output Temperature Transmitter provides a linearized, highly accurate, stable and repeatable transmitter output for multiple thermocouple types and 100 Ohm platinum RTDs. The transmitter accepts the outputs of types J, K, T, E, N, R or S thermocouples, plus 100 ohm platinum RTD’s with DIN alpha of 0.00385 or ANSI alpha of 0.00392. The thermocouple or RTD type and temperature range, specified in °C or °F, are user-selectable.All ranges for all temperature sensor types are digitally calibrated at the factory, with calibration data stored in EEPROM on the signal conditioner board. This allows signal conditioner boards and ranges to be changed in the field with no need for recalibration. Cold junction compensation automatically corrects for temperature variations at the thermocouple reference junction at the transmitter. Open sensor indication is standard and may be set up to indicate either upscale or downscale. RTD excitation is provided by the transmitter. RTD connections can be of the 2-, 3- or 4-wire type. For 3- and 4-wire connections, the transmitter automatically compensates for lead resistance of the sensor. Fast read rate at up to 50 or 60 conversions per second while integrating the signal over a full power line cycle is provided by Concurrent Slope (Pat 5,262,780) analog-to-digital conversion. High read rate is ideal for peak or valley capture and for real-time computer interface and control. LTM Series serial output transmitters send data via an isolated serial port, which is user configurable for RS232 or RS485 and full or half duplex operation. Three protocols are user selectable: Modbus RTU, Modbus ASCII, or Micron ASCII. Modbus operation is fully compliant with Modbus Over Serial Line Specification V1.0 (2002). The Micron ASCII protocol allows up to 31 Micron devices to be addressed on the same RS485 data line. It is simpler than the Modbus protocol and is recommended when all devices are Microns. It also allows use of Micron Datalogging Software. Standard features of Micron transmitters include: Serial data output, isolated. User selectable RS232 or RS485, half or full duplex, Modbus or Micron ASCII protocol. Dual solid state relays for control or alarm, isolated. Rated 120 mA at 130 Vac or 170 Vdc. Analog transmitter output, 16-bit, user scalable and isolated. User selectable 4-20 mA, 0-20 mA or 0-10V levels. Universal AC power supply for 85-264 Vac.
Easy Transmitter programming is via Micron's Instrument Setup Software, which runs on a PC under MS Windows. This software can be downloaded from this website at no charge. Click Here for Complete Details and Specifications |