Xylem Ai1 Product Manual page 22

RS485 sensors. If a full bidirectional RS232 sensor is to be used, the M12 connector is easily rewired internally to
suit. The wiring for all these options is provided in Table 2. The M12 pin numbering is as per Figure 11.
Table 2 - M12 Wiring
Wiring M12-5
Port 1 M12 (default)
nd
Port 2 2 M12 (optional)
RS485 RS485 M12 (Default if RS485)
6
RS232 RS232 M12
The default wiring suits a wide range of common sensors. Some of the most common sensor wiring is shown in
Table 3. Many sensors may operate with the default wiring for Port 1 or Port 2, while RS485 sensors operate with
the default wiring for stations supplied with the RS485 interface inbuilt. Cells highlighted with an asterisk
that this wire needs to be changed from the default wiring, inside the Ai1POLE housing. Sensor names highlighted
with a percentage symbol
Port 1 and Port 2 so a rain gauge can be fitted to either, a common option.
The internal terminals are labelled
along the edge with abbreviations to
fit the space. SW12V is SW, 1TB is a
multi-function terminal that can be
either C1, Tx, or RS485_B depending
on the solder jumpers selected, and
2RA is a similar multi-function
terminal that can be C2, Rx, or
RS485_A. The solder jumpers are
aligned behind to terminals as shown
here.
Table 3 - Wiring for commonly used environmental sensors, with sensor wire colors indicated by the color of the cell.
Internal M12 Pin:
Internal M12 Wire Color:
YSI EXO
(impulse pin in brackets)
YSI ProDSS/SWAP
(Milspec letter in brackets)
YSI 6 Series
Insitu AquaTROLL
Observator NEP5000 Turbidity
ZebraTech Optical DO
Seabird SBE16+ Sonde
Thermistor (Modbus)
RS485 Weather Station
SDI12 Weather Station
Vaisala WXT536 Weather Stn.
Met2 Wind Sensor (WS/WD)
Pyranometer (CS320)
PAR Quantum Sensor (CS310)
Sontek IQ
6
RS232 port wiring changed from serial number 31000 onwards. The old standard was white to RS232 Rx, and blue to A2. This
change was made to allow Sontek to operate with the CR300 in PortBridge() mode for remote configuration
7
Both the blue and white from the Vaisala cable are wired into C1 for SDI12 to work
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%
indicate that a molded M12 cable is to be connected to the sensor. PSW is used on both
Power
Pin 1
Brown
SW12V
(3)
SW12V
(A)
SW12V
SW12V
SW12V
SW12V
(D-Opto)
BAT*
SW12V
SW12V
SW12V
SW12V
SW12V
SW12V
SW12V
Power Digital In
Pin 1 Pin 2
Brown White
SW12V C1
SW12V C1
SW12V C1
SW12V C1
2RA
1TB
Digital In Analog In
Pin 2 Pin 3
White Blue
C1 RS485_B
(1)
RS485_B
C1
C1
C1
C1
RS232 Rx
RS485_B
RS485_B
C1
7
C1 (Blue+White)
C1
C1
A1
C1 Orange
Figure 11 - M12 connector pin numbering
Analog In Ground
Pin 3 Pin 4
Blue Black
A1 GND
A2 GND
RS485_B GND
RS232 Rx GND
Ground Misc
Pin 4 Pin 5
Black Grey
GND RS485_A
(5) (2)
GND RS485_A
(E)
(C)
GND
GND
GND
GND
GND RS232 Tx
GND RS485_A
GND RS485_A
GND
GND
GND
GND
GND
GND Green
Misc
Pin 5
Grey
PSW
PSW
RS485_A
RS232 Tx
*
indicate
Ai1 Port
Usage
RS485
(6)
RS485
(D)
Port 1/2
Port 1/2
Port 1/2
Port 1/2
RS232
RS485
RS485
Port 1/2
Port 1/2
Port 1/2
Port 1/2
Port 1/2
6
RS232