Xylem SIT65 SATELLITE INTERNET TELEMETRY - Manual (Page 5)

Global Water Instrumentation
5
Analog Inputs
There are provisions for up to 8 analog inputs. The number of enabled inputs is
factory programmable but the inputs can be configured by the user as 0-20mA, 0-
1mA, 0-500uA, 0-5VDC or 0-10VDC. To conserve power, the sensors connected to
these inputs are usually switched on only when readings are being taken, the sensor
warm-up time. This warm-up time is a factory programmed setting but the voltage
powering the sensors during this time is user configurable for 5V, 12V or 18V
switched; or 12 volts continuous. The sensor warm-up time setting applies to all
analog channels. Setting the configuration jumpers for 12 volt continuous operation
defeats the sensor power switch and warm-up time and powers the sensor
connected to that analog channel at 12 volts all the time.
The quick-connect input connectors are color coded for easy wiring. The ground
terminals are black, sensor power is red, and the sensor input is white. Insert the
wire into the connector and push the locking lever down. To release the wire, lift the
lever up until it locks it place.
Each channel can be configured separately using jumpers on the controller board.
Two jumpers are used for the input type and two are used to select the sensor
voltage. The jumper settings are the same for each channel. The diagram below
illustrates a 0-20mA (4-20mA) input with 12VDC switched sensor power. Disconnect
the battery when connecting sensors or changing the jumper settings.