Fluidwell E126-P-EL, Manual

Page: 49 / 72

E126-P-EL User Manual
FW_E126-P-EL_M_v0301-01_EN Page 49
Power supply type PD provides a sensor supply voltage of 8.2, 12, or 24 VDC.
S1
S2
S3
P3
↓
+
J1-J2
8.2 ; 12V; 24V V
Common system ground
PNP-LP*
R
3V
↓
+
┴
MEM
Fig. 32:
Terminals S1-S3 and P3: Pulse signal input PNP
Reed switch
The unit can be used with flowmeters which have a reed switch. To avoid pulse bounce from the
reed switch, it is advised to select REED LP – low-pass noise filter, which limits the maximum input
frequency (see
SETUP 4.1: FLOWMETER > SIGNAL [»26]
). Make sure the contact resistance of the reed
switch is less than 1V@2uA=500 kOhm.
S2
Common system ground
S3
REED-LP*
┴
R
3V
S1
MEM
Fig. 33:
Terminals S1-S2: Reed switch input
NAMUR signal
The unit is suitable for flowmeters with a NAMUR signal (units with PX cannot power the NAMUR
sensor). If required the NAMUR sensor can be supplied via the 8.2 V sensor supply (terminal P3),
only available with power supply type PD. See
SETUP 4: FLOWMETER [»26]
for more information.
S1
S2
S3
P3
↓
+
J1-J2
8.2V
Common system ground
R
┴
MEM
Fig. 34:
Terminals S1-S2 and P3: NAMUR input signal