MS574 0210 0007
Page 21
Reed-switch input
The ER is suitable for use with flowmeters which have a Reed-switch. To avoid pulse bounce from
the Reed-switch, it is advised to select REED LP - low-pass filter (read par. 3.2.3.)
INTERNAL
EXTERNAL
Reed - switch signal input
2
Common ground unit
SIGNAL
1
GND
shielding
REED
SWITCH
+ 3.2V DC
1M
low-pass filter
selection REED-LP
Flowmeter
Terminal 9-10: Power supply Backlight
To power the backlight, a voltage in the range 20-30V DC has to be connected.
Maximum current 30mA. Connect the "
-
" to terminal 9 and the "
+
" to terminal 10.
