KROHNE MFC 300 EN - Manual (Page 35)

ELECTRICAL CONNECTIONS
4
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MFC 300
www.krohne.com 02/2012 - 4000498602 - MA MFC 300 R03 en
4.6 Connecting power, all housing variants
• The protection category depends on the housing versions (IP65...67 to IEC 529 / EN 60529 or
NEMA4/4X/6).
• The housings of the devices, which are designed to protect the electronic equipment from
dust and moisture, should be kept well closed at all times. Creepage distances and
clearances are dimensioned to VDE 0110 and IEC 664 for pollution severity 2. Supply circuits
are designed for overvoltage category III and the output circuits for overvoltage category II.
• Fuse protection (I
N
≤ 16 A) for the infeed power circuit, as well as a separator (switch, circuit
breaker) to isolate the signal converter must be provided close to the device. The separator
must be marked as the separator for this device.
100...230 VAC (tolerance range: -15% / +10%)
• Note the power supply voltage and frequency (50...60 Hz) on the nameplate.
• The protective ground terminal PE
PE PE PE of the power supply must be connected to the separate U-
clamp terminal in the terminal compartment of the signal converter
For the 19" rack-mounted housing please refer to the connection diagrams.
24 VDC (tolerance range: -55% / +30%)
24 VAC/DC (tolerance ranges: AC: -15% / +10%; DC: -25% / +30%)
• Note the data on the nameplate!
• For measurement process reasons, a functional ground FE
FE FE FE must be connected to the
separate U-clamp terminal in the terminal compartment of the signal converter.
• When connecting to functional extra-low voltages, provide a facility for protective separation
(PELV) (acc. to VDE 0100 / VDE 0106 and/or IEC 364 / IEC 536 or relevant national
regulations).
DANGER!
The device must be grounded in accordance with regulations in order to protect personnel
against electric shocks.
DANGER!
For devices used in hazardous areas, additional safety notes apply; please refer to the Ex
documentation.
INFORMATION!
240 VAC+5% is included in the tolerance range.
INFORMATION!
For 24 VDC, 12 VDC-10% is included in the tolerance range.
.book Page 35 Monday, February 6, 2012 11:01 AM