Siemens SITRANS FX330 - Limit switch output

ELECTRICAL CONNECTIONS 4
47
SITRANS FX330
www.siemens.com/flow08/2022 - A5E36751269-AG EN
4.3.5 Limit switch output
Connection of binary output
In accordance with the desired signal transmission, select one of the following connection types
for binary output M:
• M2/4 and M3 - NAMUR (DC interface in accordance with EN 60947-5-6)
• M2/4 and M1 - Transistor output (passive, open collector)
Figure 4-4: Connection of binary output
1 Power supply U
ext.
2 Isolated switching amplifier
INFORMATION!
Binary output Mx can only be operated if the loop supply 4...20 mA is applied to the terminals C1+
an
d C2-. The binary output is inactive by default and must thus be activated in menu C2.2 prior to
first use.
Terminal M1 M3 M2/4
Connection NAMUR + (open collector,
R
i
~ 1 kΩ)
Common
Connection transistor output + (open collector,
I
max
< 100 mA)
Common
Table 4-1: Terminal connection