ABB MEASUREMENT & ANALY TICS | DATA SHEET 266DSH Differential pressure transmitters

Terminal block

HART version: three terminals for signal/external meter 

wiring up to 2.5 mm2

 (14 AWG), also connection points for 

test and communication purposes.

WirelessHART version: connection points for test and 

communication purposes; additional fast connection for 

external harvesting unit.

Fieldbus versions: two terminals for signal wiring (bus 

connection) up to 2.5 mm2

 (14 AWG)

Grounding 

Internal and external 6 mm2 (10 AWG) ground termination 

points are provided.

Mounting position

Transmitter can be mounted in any position.

Electronics housing may be rotated to any position. A 

positive stop prevents over travel.

Mass (without options)

4 kg approx (8.8 lb) for standard static and gauge 

versions;

7 to 11 kg approx (16 to 24 lb) for flange mounted version;

add 1.5 kg (3.3 lb) for AISI housing.

Add 650 g (1.5 lb) for packing.

Packing

Carton 27 x 24 x 20 cm approx (11 x 10 x 8 in.);

Carton 35 x 33 x 35 cm approx (14 x 13 x 14 in) for flange 

mounted version

Specification – configuration

Transmitter with HART communication 

and 4 to 20 mA

Standard configuration

Transmitters are factory calibrated to customer's 

specified range. Calibrated range and tag number are 

stamped on the tag plate. If a calibration range and tag 

data are not specified, the transmitter will be supplied 

with the plate left blank and configured as follows:

Engineering Unit kPa

4 mA Zero

20 mA Upper Range Limit (URL)

Output Linear

Damping 1 s

Transmitter failure mode Upscale

Tag Blank (up to 32 alphanumeric 

characters - long; 

only 8 visible on display - short)

Optional LCD display PV in kPa; output in mA and 

in percentage on bargraph

Any or all the above configurable parameters, including 

Lower range–value and Upper range-value which must be 

the same unit of measure, can be easily changed using the 

HART hand–held communicator or by a PC running the 

configuration software with DTM for 266 models. The 

transmitter database is customized with specified flange 

type and material, O–ring and drain/vent materials and 

meter code option.

Tag and Calibration

Tag and/or specific calibrated span can be requested 

when configuring the device.

Two tag types are available: Short Tag and Long Tag.

See below table for details about tag type applicability / 

presence:

Type Max Length On Display On CertificationOn Device Label

Short Tag 8 digits YES YES NO

Long Tag 32 digits NO YES YES

In case no specific indication will be given about the tag 

type, data will be considered as Long Tag by default.

In case tag is required on the optional wired-on customer 

data plate (optional digits I1, I3) specific indication needs 

to be given.

Custom configuration (option N6)

The following data may be specified in addition to the 

standard configuration parameters:

Descriptor 16 alphanumeric characters

Message 32 alphanumeric characters

Date Day, month, year

For HART protocol available engineering units of pressure 

measure are :

Pa, kPa, MPa

inH2O@4 °C, mmH2O@4 °C, psi

inH2O@68 °F, ftH2O@68 °F, mmH2O@68 °F

inHg, mmHg, Torr

g/cm2

, kg/cm2

, atm

mbar, bar

These and others are available for PROFIBUS and 

FOUNDATION Fieldbus.

Transmitter with WirelessHART 

communication

Standard configuration

Transmitters are factory calibrated to customer's 

specified range. Calibrated range and tag number are 

stamped on the tag plate. If a calibration range and tag 

data are not specified, the transmitter will be supplied 

with the plate left blank and configured as follows:

Engineering Unit kPa

Output scale 0 % Lower Range Limit (LRL)

Output scale 100 % Upper Range Limit (URL)

Output Linear

Update time 16 s

Tag Blank (up to 32 alphanumeric 

characters - long; 

only 8 visible on display - short)

Optional LCD display PV in kPa; output in 

percentage on bargraph

Any or all the above configurable parameters, including 

Lower range–value and Upper range-value which must be 

the same unit of measure, can be easily changed using the 

HART hand–held communicator or by a PC running the 

configuration software with DTM for 266 models. The 

transmitter database is customized with specified flange 

type and material, O–ring and drain/vent materials and 

meter code option.

Custom configuration (option N6)

The following data may be specified in addition to the 

standard configuration parameters:

Descriptor 16 alphanumeric characters

Message 32 alphanumeric characters

Date Day, month, year

Transmitter with PROFIBUS PA 

communication

Standard configuration

Transmitters are factory calibrated to customer’s 

specified range. Calibrated range and tag number are 

stamped on the tag plate. If a calibration range and tag 

data are not specified, the transmitter will be supplied 

with the plate left blank and configured as follows:

Measure Profile Pressure

Engineering Unit kPa

Output scale 0 % Lower Range Limit (LRL)

Output scale 100 % Upper Range Limit (URL)

Output Linear

Hi-Hi Limit Upper Range Limit (URL)

Hi Limit Upper Range Limit (URL)

Low Limit Lower Range Limit (LRL)