Siemens SITRANS FX330 - Pulse output; Frequency output

ELECTRICAL CONNECTIONS 4
49
SITRANS FX330
www.siemens.com/flow08/2022 - A5E36751269-AG EN
4.3.6 Pulse output / Frequency output
The maximum frequency of both pulse output and frequency output is 1000 Hz.
The connection is made between terminal M2
/4 Common (-) and M1 for Hi Current (+) or M3
NAMUR (+). Only one of the two connections M1 or M3 can be selected in menu C2.2. The output
is selected as pulse or frequency output in menu C2.2.
The output is a passive "open collector" output which is electrically separated from the current
interface and the flow sensor. It requires its own power supply ② . The total resistance must be
adapted so that the total current I
tot
does not exceed 120 mA.
For selection of measurement variable and adjustable data of the pulse or frequency output
re
fer to chapter "Menu description C - Setup", menu "C2.2.2 Pulse Output" or menu "C2.2.3
Frequency Output" and appropriate submenus.
Figure 4-5: Electrical connection pulse output
1 Signal converter power supply
2
Pulse output power supply
3 Pulse counter or frequency meter
F
igure 4-6: Pu
lse output signal definition
1 T
max
2 Closed
3 Open
4 Pulse width ≥
0.5 ms
INFORMATION!
Make sure the pulse width is in line with the pulse rate.