Figure 3: 266 Vertical flange transmitter dimensions ................................................................................................ 5

Figure 4: 266 MODBUS

Figure 5: Supply current chart ................................................................................................................................. 8

Figure 6: Power consumption chart ......................................................................................................................... 8

Figure 7: RS-485 MODBUS

Figure 8: Sample MODBUS

Figure 9: Operation screen (Operator Page 1) ....................................................................................................... 14

Figure 10: Local HMI display ................................................................................................................................. 14

Figure 11: HMI menu tree hierarchy ...................................................................................................................... 15

Figure 12: Transmitter name plates ....................................................................................................................... 17

Figure 13: Horizontal flange assembly, direct mount (for illustrative purposes only) ............................................... 19

Figure 14: Vertical flange assembly, direct mount (for illustrative purposes only).................................................... 20

Figure 15: Pipe saddle assembly ........................................................................................................................... 21

Figure 16: Pipe mounting bracket assembly .......................................................................................................... 22

Figure 17: Horizontal flange assembly, pipe-mounted ............................................................................................ 22

Figure 18: Transmitter housing rotation and stop-screw ......................................................................................... 23

Figure 19: Display rotation..................................................................................................................................... 24

Figure 20: Explosion-proof RTD, disassembled ..................................................................................................... 25

Figure 21: RTD probe wiring to explosion-proof head wiring block ......................................................................... 26

Figure 22: RTD wiring to transmitter ...................................................................................................................... 26

Figure 23: RTD probe ........................................................................................................................................... 27

Figure 24: Ground connections ............................................................................................................................. 28

Figure 25: Housing covers and cable entry points .................................................................................................. 30

Figure 26: RTD Simulation wiring .......................................................................................................................... 31

Figure 27: Termination block showing RTD, communication, and electrical connections ........................................ 32

Figure 28: Display operating properly .................................................................................................................... 33

Figure 29: HMI navigation ..................................................................................................................................... 34

Figure 30: Easy Setup menu ................................................................................................................................. 35

Figure 31: Connections required to validate communication in a non-hazardous area ............................................ 37

Figure 32: MODBUS

Server state diagram .......................................................................................................... 38

Figure 33: Connections and manifold valve operation (for illustrative purposes only) ............................................. 39

Figure 34: 266 MODBUS

Figure 35: Transmitter housing security screws ..................................................................................................... 45

Figure 36: DIP switches on the electronics module ................................................................................................ 46

Figure 37: Transmitter disassembly ....................................................................................................................... 48

Figure 38: Software revision numbers ................................................................................................................... 50

Figure 39: Electronics module ............................................................................................................................... 51

Figure 40: Ribbon cable ........................................................................................................................................ 51

Figure 41: HMI connector ...................................................................................................................................... 52

Figure 42: DIP switch 1 ......................................................................................................................................... 52

Figure 43: Termination points ................................................................................................................................ 54

Figure 44: Terminal block ...................................................................................................................................... 55

Figure 45: Contrast setting .................................................................................................................................... 56

Figure 46: RTD replacement ................................................................................................................................. 57

Figure 47: Transmitter with a 3-valve manifold (for illustrative purposes only) ........................................................ 58

multivariable transmitter exploded view ............................................................................ 6

communication signal lines ...................................................................................... 11

message frame ........................................................................................................ 13

multivariable transmitter replacement parts .................................................................. 44

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