Cable Entries; Type Of Protection Xp "Explosion Proof; Electrical Connections - ABB VA Master FAM540 Commissioning Instructions

3.2.3

Cable entries

Devices with FM and CSA approval are delivered for electrical
connection using conduit systems that have 1/2" NPT
connection threads and are sealed with dust protection plugs.
Alternatively, cable glands with 1/2" NPT thread can be used
for the connection. National guidelines (NEC, CEC) must be
observed.
For operation with type of protection XP "Explosionproof", the
installation instructions in chapter "„Type of protection XP
"Explosion proof"" on page 19" must be observed.
3.2.4

Type of protection XP "Explosion proof"

For operation with type of protection XP "Explosion proof", the
connection is made using Ex-approved pipe fittings with a
flame barrier with type of protection XP.
In Group A and B hazardous areas, the flame barriers must be
installed within a distance of 46 cm (18.1 inch) from the
device.
When using cable glands for the connection, Ex-approved
cable glands with type of protection XP or Ex-d must be used
(see Fig. 5).
NOTE
There must be a separate XP type examination certificate for
the pipe fitting.
The use of standard cable and wire entries and sealing plugs
is prohibited.
The pipe fitting is not included in the scope of supply.
1
Fig. 5: Connection using a flameproof cable gland
1 Strain relief 2 M25 x 1.5 / 1/2"-NPT adapter 3 Gasket
4 Sleeve 5 Union nut
The outside diameter of the unshielded connection cable must
be between 8.0 ...11.7 mm (0.3 ... 0.5 inch).
The cable gland must be dimensioned accordingly.
After installing the cable in the gland, tighten the union nut to a
torque of 3.25 Nm (2.40 lbf/ft).
Use an additional strain relief device in the housing to secure
the connection cable.
2 3 4 5
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3.2.5

Electrical connections

Fig. 6: FM / cCSAus electrical connection
1 FM Approved IS Barrier 2 Potential equalization
Terminal Function
31 / 32 Power supply / current output / HART output
41 / 42 Binary output
Alarm signaling unit (min.)
51 / 52 Alarm signaling unit (max.)
1,8
1,6
1,4
1,2
1
0,8
0,6
0,4
0,2
0
14
20
IS
Fig. 7: Terminals 31 / 32, power supply / load
U Power supply
V
R Maximum permissible load in the power supply (z. B. indicator)
B
The minimum voltage U = 0 V is based on a load of 0 Ω.
V
VA Master FAM540 | CI/FAM540-EN Rev. B 19
28 46
30 40
XP, DIP, NI, S
U [V]
50
V
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