Yokogawa 202 Field Mounting Rate Totalizer - Manual (Page 32)

Flowmeter Input 28
1. Squarewave, CMOS or Pulse
2. Open Collector
With 15
µ
A/150
µ
A internal pull up current
3. Reed Switch - Battery Powered
With 15
µ
A internal pull up current
Note: For a switch or reed input with contact bounce link DBL can be switched "on". This will
eliminate the effect of switch bounce while limiting the input frequency to 200Hz.
Link Settings
Link 1
Link 2
Link 3
COIL PULSE
DB DBH
NPS
Switching threshold voltage is 1.3 volts.
Link Settings
Link 1
Link 2
Link 3
COIL PULSE
DBL DBH
NPS
Link Settings
Link 1
Link 2
Link 3
COIL PULSE
DBL DBH
NPS
eg. Positive displacement flowmeters
with reed switch outputs.