KROHNE OPTISONIC 3400 EN - Manual (Page 53)

ELECTRICAL CONNECTIONS
4
53
OPTISONIC 3400
www.krohne.com 11/2013 - 4002037702 - HB OPTISONIC 3400 -en-R02
Status output/limit switch S
N
NAMUR, Ex i I/Os
• Connection acc. to EN 60947-5-6
• open:
I
nom
= 0.43 mA
closed:
I
nom
= 4.5 mA
• The output is closed when the device is de-energized.
• X designates the connection terminals B or D, depending on the version of the signal
converter.
4.7.6 HART ® connection
HART ® connection active (point-to-point)
The parallel resistance to the HART ® communicator must be R ≥ 230 Ω.
INFORMATION!
• Any connection polarity.
Figure 4-27: Status output/limit switch S
N
to NAMUR EN 60947-5-6 Exi
INFORMATION!
• In the basic I/O the current output at connection terminals A+/A-/A always has HART ®
capability.
• For modular I/O and Ex i E/A, only the output module for the connection terminals C/C- has
HART
® capability.
Figure 4-28: HART ® connection active (I
a
)
1 Basic I/O: terminals A and A+
2 Modular I/O: terminals C- and C
3 HART
® communicator