Vaisala MGP261, Руководство пользователя

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While installing or uninstalling the device, there is a risk of
flammable gas release or flame entrance.
WARNING!
Wiring Requirements
• The wiring of the optional intrinsically safe (Ex ia) external pressure or temperature sensor
input terminal must be kept separate from the analog input, power supply input, and
RS-485 wiring.
• See the overview in
the installation instructions
.
• The cable glands and wires used for wiring MGP261 must be Ex compliant.
• Unused lead-throughs must be sealed using Ex compliant plugs.
• Select a strain relief option that suits the application (either use cable glands that include
strain relief or install separate clamps: see IEC 60079-14).
• See Table 4 (page 18) for screw terminal requirements.
• Permitted supply short-circuit current (I
k
): 50 A
• MGP261 analog outputs must be externally powered.
Connect only de-energized wires. Never switch on the power supply
input before completing the wiring and closing the connection box.
CAUTION!
Screw Terminal Connections
Table 4 Screw Terminal Wiring Requirements
Property Specification
Connection torque 0.5 Nm ... 0.6 Nm
Connection capacity (solid and flexible)
0.2 mm
2
... 2.5 mm
2
(AWG 24 ... 12)
Stripping length 7 mm (0.27 in)
Intrinsic Safety
The overvoltage category of MGP261 is I (non-mains equipment), as defined in IEC 60664-1.
MGP261 is in conformance with the IEC 60079-11 dielectric strength requirement. For the
intrinsic safe IIB output parameters, see
Table 5 (page 18) .
Table 5 Intrinsic Safe IIB Output Parameters
Parameter Value
U
o
25.2 V
I
o
78 mA
MGP261 User Guide M212273EN-A
18