ABB 266 MODBUS User Manual

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List of Figures
Figure 1: 266 Multivariable transmitter and RTD process inputs............................................................................... 3
Figure 2: 266 Horizontal flange transmitter dimensions ............................................................................................ 4
Figure 3: 266 Vertical flange transmitter dimensions ................................................................................................ 5
Figure 4: 266 MODBUS
®
multivariable transmitter exploded view ............................................................................ 6
Figure 5: Supply current chart ................................................................................................................................. 8
Figure 6: Power consumption chart ......................................................................................................................... 8
Figure 7: RS-485 MODBUS
®
communication signal lines ...................................................................................... 11
Figure 8: Sample MODBUS
®
message frame ........................................................................................................ 13
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
®
multivariable transmitter replacement parts .................................................................. 44
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

ABB 266 MODBUS Specifications

General

Brand	ABB
Model	266 MODBUS
Category	Transmitter
Language	English