The 266 Modbus multivariable transmitter measures differential pressure, absolute pressure, and process temperature via an externally connected Pt100 RTD in a single device, outputting data via 2-wire half-duplex RS485 Modbus protocol at one update per second. It operates on 10.5 to 30 VDC with reversed polarity protection and includes built-in surge suppression. Base accuracy is 0.04% of calibrated differential pressure span and 0.05% of calibrated absolute pressure span, with 2-year stability and a range down ratio of up to 100:1. An optional integrated LCD display with TTG (through-the-glass) keypad enables local configuration without opening the housing. The transmitter meets ANSI/ISA-S82.03 hydrostatic test requirements and is rated for ambient temperatures from -40 to 85 °C.
The 266 Modbus® multivariable provides precise and reliable measurement of differential pressure, static pressure, temperature (from an external RTD) and diagnostic information once every second, to flow computers and RTUs. Individual device Modbus® addresses can easily be configured using the optional keypad/display or using the XMV Interface application in ABB’s Totalflow flow computers or RTUs. This application creates a “plug and play” interface to the multivariable sensor and indicates any active alarms that may be present in easily understood text. The combination of ABB’s Totalflow flow computer or RTU and one or more ABB 266 Modbus® multivariables makes an ideal solution when multi-tube measurement is required and/ or when the transmitters must be located in a Class I, Division 1 hazardous location.
| ABB Measurement & Analytics | |
|---|---|
| Product Category | Pressure Transmitters |
| Product Number | 266 Modbus |
| Product Name | Multivariable transmitter |
| Signal Output | RS232/485 |
| Pressure Measurement | Absolute; Differential |
| Media | Gas; Handles Hazardous Materials |
| Display Type | Digital Numerical Display |
| Features | Temperature Compensated; Temperature Output; Alarm Indicator |
