Transmitter Wiring; Cable Connection - ABB 266 HART Operating Instruction

266 Models - HART
Pressure or absolute pressure measurement of a gas in a pipe
– Place the tap at the top or side of the line.
– Mount the transmitter beside or above the tap.
– Connect the transmitter to the pipe.
Figure 34: Gauge or absolute pressure measurement of gas in a pipe with DP and P style transmitter

Transmitter wiring

Warning - General risks
Observe the applicable regulations governing electrical installation. Connections must only be established in a dead-voltage state. Since the transmitter has
no switch-off elements, overvoltage protection devices, lightning protection, and voltage separation capacity must be provided at the plant (overvoltage/
lightning protection is optional). Check that the existing operating voltage corresponds to the voltage indicated on the name plate.
The same lines are used for both the power supply and output signal. In case the surge protection option is present and the transmitter is installed in a
Hazardous area, the transmitter has to be power supplied from a voltage source isolated from mains (galvanic separation).
Furthermore the potential equalization for the entire powering cable must be guaranteed since the intrinsic safety circuit of the transmitter is grounded.
Warning - General risks
Electrical shock can result in death or serious injury. Avoid contact
with the leads and terminals.
High voltage that may be present on leads can cause electrical
shock.

Cable connection

Depending on the design supplied, the electrical connection is established via a cable entry, M20 x 1.5 or 1/2-14 NPT thread, or
Han 8D plug (8U) (PROFIBUS PA and FOUNDATION Fieldbus: M12 x 1 or 7/8 plug). The screw terminals are suitable for wire
cross sections of up to 2.5 mm2 (AWG 14).
28 OI/266/HART-EN Rev. D | 2600T Series Pressure transmitters
Warning - General risks
Do NOT make electrical connections unless the electrical code
designation stamped on the transmitter data plate agrees with the
classification of the area in which the transmitter is to be installed.
Failure to comply with this warning can result in fire or explosion.