Limit Switch Output - Siemens SITRANS FX330 Operating Instructions Manual

SITRANS FX330

4.3.5 Limit switch output

Figure 4-4: Connection of binary output
1 Power supply U
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+
and C2-. The binary output is inactive by default and must thus be activated in menu C2.2 prior to
first use.
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)
Terminal
Connection NAMUR
Connection transistor output
Table 4-1: Terminal connection
08/2022 - A5E36751269-AG EN
ext.
+ (open collector,
I
max
www.siemens.com/flow
ELECTRICAL CONNECTIONS
M1 M3
+ (open collector,
R ~ 1 kΩ)
i
< 100 mA)
4
M2/4
Common
Common
47