Assembling And Connecting The Socket Connector; Grounding; Surge Protector Equipped Terminal Block (Optional); Common Mode Voltages - ABB 266 HART Series Operating Instruction

6.5.2 Assembling and connecting the socket connector

The socket connector for connecting the cable is supplied
unassembled as an accessory for the transmitter.
— The contacts (2) are crimped or soldered onto the cable
ends (wire cross section of 0.75 ... 1 mm² (AWG 18 ...
AWG 17)), from which approx. 1.5 ... 2 cm (0.59 ...
0.79 inch) of the sleeve and approx. 8 mm (0.32 inch) of
the insulation have been stripped; they are then inserted
into the socket (1) from the rear.
— Slide the set screw (6), clamping ring (5), gasket (4), and
housing (3) onto the cable in the order indicated before
assembly (you may have to adjust the gasket (4) to fit the
cable diameter).
Important. Before you press the contacts completely into the
socket, check the connection points again. Incorrectly inserted
contacts can be removed by using a press-out tool (part no.:
0949 813), or a standard ballpoint pen as a makeshift tool. Please
observe the connection diagram included with the plug.
1 - Socket
2 - Contact
3 - Housing
4 - Gasket (can be cut)
5 - Clamping ring
6 - PG 11 set screw
7 - Cable (diameter 5 - 11 mm or 0.20 - 0.43 inch)
Figure 42: Socket connector components

6.6 Grounding

Pressure transmitter housing should be grounded or earthed in
accordance with national and local electrical codes. Ground
connection is mandatory for surge protector equipped devices
in order to ensure proper functioning.
Protective grounding terminals (PE) are available outside and/or
inside the housing of the transmitter. Both ground terminals are
electrically connected and it up to the user to decide which one
to use. The most effective transmitter case grounding method
is direct connection to earth ground with impedance equal or
less of 5 ohm.
Figure 43: Ground connection on transmitter housing
6.7 Surge protector equipped terminal block
(optional)
The pressure transmitter housing with surge protector (code
S2) inside the terminal board must be connected using the
grounding terminal (PE), by means of a short connection with
the equipotential bonding.
Equipotential bonding conductor must to have 4.00mm2 of
maximum cross-section.
Important. Test voltage withstand capability can no longer be
ensured when this protective circuit is used.

6.8 Common mode voltages

266 pressure transmitter operates within the specified levels of
accuracy for common-mode voltages of up to 250V between
lines and housing grounded.
2600T Series Pressure transmitters | OI/266/HART-EN Rev. M 31
6 Transmitter wiring