Xylem H-3531 FlashLite - Manual (Page 16)

2-4 Installation
H-3531
2.4 Connecting Your Data Logger
The H-3531 FlashLite™ has SDI-12, RS232 and Modbus “smart” digital interfaces together with
quadrature, 0-5V analog and 4-20mA output. The H-3531 FlashLite™ is a SDI-12 V1.3 compliant
sensor excluding the CRC commands. It connects directly to any data recorder with SDI-12
capability. The instrument housing has a 7 pin main interface connector and a 3 pin RS232
communication connector.
7-pin Circular Connector 3-pin Circular Connector
Pin Color Function Pin Color Function
1
2
3
4
5
6
7 Orange
Brown
Blue
Green
Black
Red
Yellow Phase A/RS485+
Phase B/RS485-
0-5V Out/4-20mA+
Analog Gnd/4-20mA-
GND
+12V Power
SDI-12 Data 1
2
3 N/A
N/A
N/A RS232(TxD)
RS232(RxD)
GND
2.4.1 SDI-12 Interface
The user must connect pins 5,6, and 7 to the data recorder or the user can power the H-
3531 FlashLite™ separate of the data recorder and connect just the SDI-12 data line(pin
7).
2.4.2 RS-232 Output
When the user wakes up the H-3531 FlashLite™ with this port while in sleep mode the H-
3531 FlashLite™ makes a new measurement and updates the outputs if enabled and then
prints out the measured stage and temperature value. If the user sends a carriage
return(CR) following the wake up then the H-3531 FlashLite™ simple menu interface is