Cable Glands - Abb Ao2040-Fidas24 Ex Operating Instruction

42 AO2040-Fidas24 Ex CONTINUOUS GAS ANALYZERS | OI/AO2000-FIDAS24-EX-EN REV. D
... 8 Electrical connections

Cable glands

Connection box on the system housing
Design for Equipment Protection Level (EPL) Gb/Gc
1 Cable gland M20×1.5
2 Cable gland M32×1.5
Image 13: Cable glands (view from below)
The electronics module connections are protected with a connection box.
Depending on the version of the instrument, the connection box is equipped with different cable entries:
• In the design for EPL Gb/Gc: five M20 and two M32 cable glands.
• In the design for EPL Db/Dc: five M20, one M32 cable gland and a M25 cable gland with dual entry.
During installation, the clamping range for lines as well as the tightening torques of the cable glands must be observed. The cable
glands have several gasket rings which need to be removed as needed depending on the cable diameter.
Cable gland Clamping range for lines and tightening torque
Sealing ring 1+2+3
M20×1.5 Ø 5.5 mm / 1.5 Nm
M32×1.5 —
M25×1.5 —
2-way
Reduction nozzle Tightening torque: 5 Nm
M32/M25
Note
Only suited and cable glands and reduction nozzles approved for the Ex Zone may be used as spare parts.
• The use of other cable glands and blind plugs lead to a loss of Ex-approval!
Specifications for the selection of cable glands
Thread sizes in the connection box
Sealing
Maximum surface roughness of the connection box
Wall thickness range of the connection box
Sealing ring 1+2
Ø 7.0 mm / 1 Nm Ø 7.0 mm / 1.5 Nm
— Ø 14 mm / 3.0 Nm
— —
M20×1.5; M32×1.5; M25×1.5 via reduction nozzles M32×1.5/M25×1.5
Sealing through molded-on gasket ring on the contact surface of the cable gland
max. Ra = 8 µm
4 to 5 mm
Design for Equipment Protection Level (EPL) Db/Dc
(dust explosion protection)
3 Cable gland M25×1.5 with dual entry in reduction nozzle M32/M25
Ø 9.0 mm / 1.4 Nm
Ø 17 mm / 4.0 Nm
—
Sealing ring 1
Ø 9.5 mm / 1.0 Nm Ø 13 mm / 1.7 Nm
Ø 17.5 mm / 1.5 Nm Ø 21 mm / 1.3 Nm
Ø 2×4.5 mm / 2.0 Nm Ø 2×7 mm / 2.0 Nm