AMMONIA User Manual
AMMONIA_User 9/09
13
B.3 Water Meters – Flowswitches – Contact Sets
Water meters, flowswitches and ‘dry’ contact sets are connected to input terminals ‘O’ through ‘V’ and a
ground terminal. 5VDC limited by 10K puts 1/2mA through a closed contact set.
Hall effect Turbines and Paddlewheel water meters are powered by the 15-22VDC analyzer supply,
thermally fused at 100mA.
S1 S2 T
+DC Power
Output
O P Q R
S T
A & B
U V
G+
4-20mA
Red Blk Wht Grn
Meter & Contact Set Inputs
Connecting Meters & Flowswitches
Upper, Measure Card
Dry Contact Set
Flowswitches
& Interlocks
Seametrics type
Turbine Water
Meters
Contact Head
Water Meters
Water Meters, Flowswitches and Contact
Sets may be connected any digital input 'O'
to 'V'
Black
Red
Red
Black
White
Red
Red
Analyzers are defaulted to
input ‘
O
’ as make-up meter
and input ‘
S
’ as the
flowswitch, operating
interlock
Connect cabling shields at the controller ends of the cable only, to any ground terminal either on the
Measure card or on the aluminum backplate, bottom, center