KROHNE OPTIWAVE 7300C ATEX EN - Manual (Page 16)

3
ELECTRICAL CONNECTIONS
16
OPTIWAVE 7300 C
www.krohne.com 06/2010 - 4000091504 - AD ATEX OPTIWAVE 7300 R06 en
3.5.2 Maximum intrinsically-safe values for the electrical circuit
Level transmitter with the 4...20 mA output option (output terminal 1 or 2)
• U
i
≤30 V
• I
i
≤300 mA
• P
i
≤1 W
• C
i
=30 nF
• L
i
=0.2 mH
Level transmitter with the PROFIBUS PA or FOUNDATION™ Fieldbus output option
(output terminal 1)
• U
i
≤30 V
• I
i
≤300 mA
• P
i
≤1 W
• C
i
=1.6 nF
• L
i
=0 mH
Level transmitter with the PROFIBUS PA or FOUNDATION™ Fieldbus output option
(output terminal 2)
• U
i
≤17.5 V
• I
i
≤380 mA
• P
i
≤5.32 W
• C
i
=3.8 nF
• L
i
=2.2 mH
3.5.3 Supply voltage
Level transmitter with the 4...20 mA output option
Level transmitter with the PROFIBUS PA or FOUNDATION Fieldbus output options
INFORMATION!
The optional second output is galvanically isolated from the main power supply, output 1 and
parts of the device that are grounded.
Current output terminal Minimum voltage at output
terminal [VDC]
Maximum voltage at output
terminal [VDC]
1 (U
S1
) 14 1 30 1
2 (U
S2
) 2 10 1 30 1
1 Minimum voltage at output terminal for a current output of 22 mA
2 Optional. Use a second power supply. This power supply energizes current output terminal 2 only.
Power supply terminal Minimum voltage at output
terminal [VDC]
Maximum voltage at output
terminal [VDC]
24 Vdc (U
S1
) 18 30