Evoqua WALLACE & TIERNAN SFC, Original Instruction Manual

Page: 13 / 288

SFC
Description
3.
13
Digital inputs
2x inputs for voltage-free contact (< 100 Ohm) power supply
via SFC (12 V)
DI 1: Sample water monitoring / freely selectable in menu
DI 2: Freely selectable in menu
Measurement inputs
1x temperature input PT 1000 (0°C – 50°C) with sensor error
display (not with Version 2)
1x feedback input
positioner position feedback
Potentiometer 1kOhm or 5kOhm, 0 – 1 V, 0 – 20 mA
(selectable via DIP switch)
1x measured value input (electrically isolated up to 50 V to
ground) for plug-in cards of the sensor measuring module (not
with Version 2):
• 3-electrode cell for chlorine, chlorine dioxide or
potassium permanganate
• Membrane sensors for total chlorine TC1/TC3, free
chlorine FC1/FC2, chlorine dioxide CD7, ozone OZ7
• pH value
• Redox voltage
• Fluoride
• Conductivity
• mA/V input
1x mA input for flow rate 0 – 20 mA/4 – 20 mA
In SFC units with a 24 V supply voltage this input is not
electrically isolated from the 24 V DC supply voltage.
1x mA input for external setpoint or dosing factor
0 – 20 mA/4 – 20 mA (not with Version 2)
In SFC units with a 24 V supply voltage this input is not
electrically isolated from the 24 V DC supply voltage.