KROHNE OPTIFLEX 4300C ATEX EN - Manual (Page 17)

ELECTRICAL CONNECTIONS
3
17
OPTIFLEX 4300 C
www.krohne.com 02/2009 - 4000523601 - AD ATEX OPTIFLEX 4300 R01 en
3.6.3 Supply voltage
3.6.4 Electrical schema
Current output terminal Minimum voltage at output
terminal [VDC]
Maximum voltage at output
terminal [VDC]
1 (U
S1
) 20 1 36 1
2 (U
S2
) 2 10 1 30 1
1 for a current output of 22 mA
2 use a second power supply. This power supply energizes current output terminal 2 only.
CAUTION!
Make sure that you connect the load resistor to the positive side.
Figure 3-5: Electrical schema for Ex d [ia]-approved equipment (with galvanic isolation)
Figure 3-6: Electrical schema for Ex d [ia]-approved equipment (without galvanic isolation)
1 Galvanically-isolated power supply (use a second power supply for optional terminal 2)
2 Power supply (use a second power supply for optional terminal 2)
3 Resistor for HART
® communication
4 Non-Ex zone
5 Ex zone
6 |U| < 5 V
AD_ATEX_OPTIFLEX4300_en_090528_4000523601_R01_D5D.book Page 17 Thursday, May 28, 2009 6:00 PM